From 0cec114e36606412908a35695a5db944cec2e3db Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Thu, 26 Dec 2019 15:36:47 -0700
Subject: scripts/dtc: Update to upstream version v1.5.1-22-gc40aeb60b47a

This adds the following commits from upstream:

c40aeb60b47a travis.yml: Run tests on the non-x86 builders, too
9f86aff444f4 Add .cirrus.yml for FreeBSD build
34c82275bae6 Avoid gnu_printf attribute when using Clang
743000931bc9 tests: default to 'cc' if CC not set
adcd676491cc Add test-case for trailing zero
d9c55f855b65 Remove trailing zero from the overlay path
7a22132c79ec pylibfdt: Adjust for deprecated test methods
dbe80d577ee2 tests: add extension to sed -i for GNU/BSD sed compatibility
af57d440d887 libfdt: Correct prototype for fdt_ro_probe_()
6ce585ac153b Use correct inttypes.h format specifier
715028622547 support byacc in addition to bison
fdf3f6d897ab pylibfdt: Correct the type for fdt_property_stub()
430419c28100 tests: fix some python warnings
588a29ff2e4e util: use gnu_printf format attribute
bc876708ab1d fstree: replace lstat with stat
4c3c4ccb9916 dumptrees: pass outputdir as first argument
aa522da9fff6 tests: allow out-of-tree test run
0d0d0fa51b1f fdtoverlay: Return non-zero exit code if overlays can't be applied
4605eb047b38 Add .editorconfig
18d7b2f4ee45 yamltree: Ensure consistent bracketing of properties with phandles
67f790c1adcc libfdt.h: add explicit cast from void* to uint8_t* in fdt(32|64)_st
b111122ea5eb pylibfdt: use python3 shebang
60e0db3d65a1 Ignore phandle properties in /aliases
95ce19c14064 README: update for Python 3
5345db19f615 livetree: simplify condition in get_node_by_path
b8d6eca78210 libfdt: Allow #size-cells of 0
184f51099471 Makefile: Add EXTRA_CFLAGS variable
812b1956a076 libfdt: Tweak data handling to satisfy Coverity
5c715a44776a fdtoverlay: Ignore symbols in overlays which don't apply to the target tree
b99353474850 fdtoverlay: Allow adding labels to __overlay__ nodes in overlays
d6de81b81b68 pylibfdt: Add support for fdt_get_alias()
1c17714dbb3a pylibfdt: Correct the FdtSw example
ad57e4574a37 tests: Add a failed test case for 'fdtoverlay' with long target path
bbe3b36f542b fdtoverlay: Rework output allocation
6c2e61f08396 fdtoverlay: Improve error messages
297f5abb362e fdtoverlay: Check for truncated overlay blobs

Cc: Frank Rowand <frowand.list@gmail.com>
Cc: clang-built-linux@googlegroups.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
 scripts/dtc/checks.c                 |  5 +++++
 scripts/dtc/dtc-parser.y             |  4 ++++
 scripts/dtc/fstree.c                 |  2 +-
 scripts/dtc/libfdt/fdt.c             |  9 +++++++--
 scripts/dtc/libfdt/fdt_addresses.c   |  8 +++++---
 scripts/dtc/libfdt/fdt_overlay.c     | 28 +++++++++++++++++++---------
 scripts/dtc/libfdt/fdt_ro.c          | 11 ++++++-----
 scripts/dtc/libfdt/libfdt.h          |  4 ++--
 scripts/dtc/libfdt/libfdt_internal.h | 12 ++++++------
 scripts/dtc/livetree.c               |  3 +--
 scripts/dtc/util.c                   |  3 ++-
 scripts/dtc/util.h                   |  4 ++++
 scripts/dtc/version_gen.h            |  2 +-
 scripts/dtc/yamltree.c               | 21 +++++++++++++++++++++
 14 files changed, 84 insertions(+), 32 deletions(-)

(limited to 'scripts')

diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index d7986ee18012..756f0fa9203f 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -691,6 +691,11 @@ static void check_alias_paths(struct check *c, struct dt_info *dti,
 		return;
 
 	for_each_property(node, prop) {
+		if (streq(prop->name, "phandle")
+		    || streq(prop->name, "linux,phandle")) {
+			continue;
+		}
+
 		if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
 			FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
 				  prop->val.val);
diff --git a/scripts/dtc/dtc-parser.y b/scripts/dtc/dtc-parser.y
index 2ed4dc1f07fd..40dcf4f149da 100644
--- a/scripts/dtc/dtc-parser.y
+++ b/scripts/dtc/dtc-parser.y
@@ -2,6 +2,8 @@
 /*
  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
  */
+%locations
+
 %{
 #include <stdio.h>
 #include <inttypes.h>
@@ -17,6 +19,8 @@ extern void yyerror(char const *s);
 		treesource_error = true; \
 	} while (0)
 
+#define YYERROR_CALL(msg) yyerror(msg)
+
 extern struct dt_info *parser_output;
 extern bool treesource_error;
 %}
diff --git a/scripts/dtc/fstree.c b/scripts/dtc/fstree.c
index 9871689b4afb..5e59594ab301 100644
--- a/scripts/dtc/fstree.c
+++ b/scripts/dtc/fstree.c
@@ -30,7 +30,7 @@ static struct node *read_fstree(const char *dirname)
 
 		tmpname = join_path(dirname, de->d_name);
 
-		if (lstat(tmpname, &st) < 0)
+		if (stat(tmpname, &st) < 0)
 			die("stat(%s): %s\n", tmpname, strerror(errno));
 
 		if (S_ISREG(st.st_mode)) {
diff --git a/scripts/dtc/libfdt/fdt.c b/scripts/dtc/libfdt/fdt.c
index 179168ec63e9..d6ce7c052dc8 100644
--- a/scripts/dtc/libfdt/fdt.c
+++ b/scripts/dtc/libfdt/fdt.c
@@ -15,8 +15,10 @@
  * that the given buffer contains what appears to be a flattened
  * device tree with sane information in its header.
  */
-int fdt_ro_probe_(const void *fdt)
+int32_t fdt_ro_probe_(const void *fdt)
 {
+	uint32_t totalsize = fdt_totalsize(fdt);
+
 	if (fdt_magic(fdt) == FDT_MAGIC) {
 		/* Complete tree */
 		if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
@@ -31,7 +33,10 @@ int fdt_ro_probe_(const void *fdt)
 		return -FDT_ERR_BADMAGIC;
 	}
 
-	return 0;
+	if (totalsize < INT32_MAX)
+		return totalsize;
+	else
+		return -FDT_ERR_TRUNCATED;
 }
 
 static int check_off_(uint32_t hdrsize, uint32_t totalsize, uint32_t off)
diff --git a/scripts/dtc/libfdt/fdt_addresses.c b/scripts/dtc/libfdt/fdt_addresses.c
index d8ba8ec60c6c..9a82cd0ba2f9 100644
--- a/scripts/dtc/libfdt/fdt_addresses.c
+++ b/scripts/dtc/libfdt/fdt_addresses.c
@@ -14,7 +14,7 @@
 static int fdt_cells(const void *fdt, int nodeoffset, const char *name)
 {
 	const fdt32_t *c;
-	int val;
+	uint32_t val;
 	int len;
 
 	c = fdt_getprop(fdt, nodeoffset, name, &len);
@@ -25,10 +25,10 @@ static int fdt_cells(const void *fdt, int nodeoffset, const char *name)
 		return -FDT_ERR_BADNCELLS;
 
 	val = fdt32_to_cpu(*c);
-	if ((val <= 0) || (val > FDT_MAX_NCELLS))
+	if (val > FDT_MAX_NCELLS)
 		return -FDT_ERR_BADNCELLS;
 
-	return val;
+	return (int)val;
 }
 
 int fdt_address_cells(const void *fdt, int nodeoffset)
@@ -36,6 +36,8 @@ int fdt_address_cells(const void *fdt, int nodeoffset)
 	int val;
 
 	val = fdt_cells(fdt, nodeoffset, "#address-cells");
+	if (val == 0)
+		return -FDT_ERR_BADNCELLS;
 	if (val == -FDT_ERR_NOTFOUND)
 		return 2;
 	return val;
diff --git a/scripts/dtc/libfdt/fdt_overlay.c b/scripts/dtc/libfdt/fdt_overlay.c
index e97f12b1a780..b310e49a698e 100644
--- a/scripts/dtc/libfdt/fdt_overlay.c
+++ b/scripts/dtc/libfdt/fdt_overlay.c
@@ -733,26 +733,36 @@ static int overlay_symbol_update(void *fdt, void *fdto)
 		/* keep end marker to avoid strlen() */
 		e = path + path_len;
 
-		/* format: /<fragment-name>/__overlay__/<relative-subnode-path> */
-
 		if (*path != '/')
 			return -FDT_ERR_BADVALUE;
 
 		/* get fragment name first */
 		s = strchr(path + 1, '/');
-		if (!s)
-			return -FDT_ERR_BADOVERLAY;
+		if (!s) {
+			/* Symbol refers to something that won't end
+			 * up in the target tree */
+			continue;
+		}
 
 		frag_name = path + 1;
 		frag_name_len = s - path - 1;
 
 		/* verify format; safe since "s" lies in \0 terminated prop */
 		len = sizeof("/__overlay__/") - 1;
-		if ((e - s) < len || memcmp(s, "/__overlay__/", len))
-			return -FDT_ERR_BADOVERLAY;
-
-		rel_path = s + len;
-		rel_path_len = e - rel_path;
+		if ((e - s) > len && (memcmp(s, "/__overlay__/", len) == 0)) {
+			/* /<fragment-name>/__overlay__/<relative-subnode-path> */
+			rel_path = s + len;
+			rel_path_len = e - rel_path - 1;
+		} else if ((e - s) == len
+			   && (memcmp(s, "/__overlay__", len - 1) == 0)) {
+			/* /<fragment-name>/__overlay__ */
+			rel_path = "";
+			rel_path_len = 0;
+		} else {
+			/* Symbol refers to something that won't end
+			 * up in the target tree */
+			continue;
+		}
 
 		/* find the fragment index in which the symbol lies */
 		ret = fdt_subnode_offset_namelen(fdto, 0, frag_name,
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
index 6fd9ec170dbe..a5c2797cde65 100644
--- a/scripts/dtc/libfdt/fdt_ro.c
+++ b/scripts/dtc/libfdt/fdt_ro.c
@@ -33,19 +33,20 @@ static int fdt_nodename_eq_(const void *fdt, int offset,
 
 const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
 {
+	int32_t totalsize = fdt_ro_probe_(fdt);
 	uint32_t absoffset = stroffset + fdt_off_dt_strings(fdt);
 	size_t len;
 	int err;
 	const char *s, *n;
 
-	err = fdt_ro_probe_(fdt);
-	if (err != 0)
+	err = totalsize;
+	if (totalsize < 0)
 		goto fail;
 
 	err = -FDT_ERR_BADOFFSET;
-	if (absoffset >= fdt_totalsize(fdt))
+	if (absoffset >= totalsize)
 		goto fail;
-	len = fdt_totalsize(fdt) - absoffset;
+	len = totalsize - absoffset;
 
 	if (fdt_magic(fdt) == FDT_MAGIC) {
 		if (stroffset < 0)
@@ -288,7 +289,7 @@ const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
 	const char *nameptr;
 	int err;
 
-	if (((err = fdt_ro_probe_(fdt)) != 0)
+	if (((err = fdt_ro_probe_(fdt)) < 0)
 	    || ((err = fdt_check_node_offset_(fdt, nodeoffset)) < 0))
 			goto fail;
 
diff --git a/scripts/dtc/libfdt/libfdt.h b/scripts/dtc/libfdt/libfdt.h
index 7b5ffd13a887..8907b09b86cc 100644
--- a/scripts/dtc/libfdt/libfdt.h
+++ b/scripts/dtc/libfdt/libfdt.h
@@ -136,7 +136,7 @@ static inline uint32_t fdt32_ld(const fdt32_t *p)
 
 static inline void fdt32_st(void *property, uint32_t value)
 {
-	uint8_t *bp = property;
+	uint8_t *bp = (uint8_t *)property;
 
 	bp[0] = value >> 24;
 	bp[1] = (value >> 16) & 0xff;
@@ -160,7 +160,7 @@ static inline uint64_t fdt64_ld(const fdt64_t *p)
 
 static inline void fdt64_st(void *property, uint64_t value)
 {
-	uint8_t *bp = property;
+	uint8_t *bp = (uint8_t *)property;
 
 	bp[0] = value >> 56;
 	bp[1] = (value >> 48) & 0xff;
diff --git a/scripts/dtc/libfdt/libfdt_internal.h b/scripts/dtc/libfdt/libfdt_internal.h
index 7830e550c37a..058c7358d441 100644
--- a/scripts/dtc/libfdt/libfdt_internal.h
+++ b/scripts/dtc/libfdt/libfdt_internal.h
@@ -10,12 +10,12 @@
 #define FDT_ALIGN(x, a)		(((x) + (a) - 1) & ~((a) - 1))
 #define FDT_TAGALIGN(x)		(FDT_ALIGN((x), FDT_TAGSIZE))
 
-int fdt_ro_probe_(const void *fdt);
-#define FDT_RO_PROBE(fdt)			\
-	{ \
-		int err_; \
-		if ((err_ = fdt_ro_probe_(fdt)) != 0)	\
-			return err_; \
+int32_t fdt_ro_probe_(const void *fdt);
+#define FDT_RO_PROBE(fdt)					\
+	{							\
+		int32_t totalsize_;				\
+		if ((totalsize_ = fdt_ro_probe_(fdt)) < 0)	\
+			return totalsize_;			\
 	}
 
 int fdt_check_node_offset_(const void *fdt, int offset);
diff --git a/scripts/dtc/livetree.c b/scripts/dtc/livetree.c
index 0c039993953a..032df5878ccc 100644
--- a/scripts/dtc/livetree.c
+++ b/scripts/dtc/livetree.c
@@ -526,8 +526,7 @@ struct node *get_node_by_path(struct node *tree, const char *path)
 	p = strchr(path, '/');
 
 	for_each_child(tree, child) {
-		if (p && (strlen(child->name) == p-path) &&
-		    strprefixeq(path, p - path, child->name))
+		if (p && strprefixeq(path, p - path, child->name))
 			return get_node_by_path(child, p+1);
 		else if (!p && streq(path, child->name))
 			return child;
diff --git a/scripts/dtc/util.c b/scripts/dtc/util.c
index 48af961dcc8c..40274fb79236 100644
--- a/scripts/dtc/util.c
+++ b/scripts/dtc/util.c
@@ -13,6 +13,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <assert.h>
+#include <inttypes.h>
 
 #include <errno.h>
 #include <fcntl.h>
@@ -393,7 +394,7 @@ void utilfdt_print_data(const char *data, int len)
 
 		printf(" = <");
 		for (i = 0, len /= 4; i < len; i++)
-			printf("0x%08x%s", fdt32_to_cpu(cell[i]),
+			printf("0x%08" PRIx32 "%s", fdt32_to_cpu(cell[i]),
 			       i < (len - 1) ? " " : "");
 		printf(">");
 	} else {
diff --git a/scripts/dtc/util.h b/scripts/dtc/util.h
index ca5cb52928e3..5a4172dd0f84 100644
--- a/scripts/dtc/util.h
+++ b/scripts/dtc/util.h
@@ -12,7 +12,11 @@
  */
 
 #ifdef __GNUC__
+#ifdef __clang__
 #define PRINTF(i, j)	__attribute__((format (printf, i, j)))
+#else
+#define PRINTF(i, j)	__attribute__((format (gnu_printf, i, j)))
+#endif
 #define NORETURN	__attribute__((noreturn))
 #else
 #define PRINTF(i, j)
diff --git a/scripts/dtc/version_gen.h b/scripts/dtc/version_gen.h
index f2761e24cf40..6dba95d23207 100644
--- a/scripts/dtc/version_gen.h
+++ b/scripts/dtc/version_gen.h
@@ -1 +1 @@
-#define DTC_VERSION "DTC 1.5.0-g702c1b6c"
+#define DTC_VERSION "DTC 1.5.0-gc40aeb60"
diff --git a/scripts/dtc/yamltree.c b/scripts/dtc/yamltree.c
index 5b6ea8ea862f..43ca869dd6a8 100644
--- a/scripts/dtc/yamltree.c
+++ b/scripts/dtc/yamltree.c
@@ -138,6 +138,27 @@ static void yaml_propval(yaml_emitter_t *emitter, struct property *prop)
 		(yaml_char_t *)YAML_SEQ_TAG, 1, YAML_FLOW_SEQUENCE_STYLE);
 	yaml_emitter_emit_or_die(emitter, &event);
 
+	/* Ensure we have a type marker before any phandle */
+	for_each_marker(m) {
+		int last_offset = 0;
+		struct marker *type_m;
+
+		if (m->type >= TYPE_UINT8)
+			last_offset = m->offset;
+
+		if (!(m->next && m->next->type == REF_PHANDLE &&
+		      last_offset < m->next->offset))
+			continue;
+
+		type_m = xmalloc(sizeof(*type_m));
+		type_m->offset = m->next->offset;
+		type_m->type = TYPE_UINT32;
+		type_m->ref = NULL;
+		type_m->next = m->next;
+		m->next = type_m;
+	}
+
+	m = prop->val.markers;
 	for_each_marker(m) {
 		int chunk_len;
 		char *data = &prop->val.val[m->offset];
-- 
cgit v1.2.3


From 56d5893615727bce4a8769c6b22340e20f9a3c33 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 19 Dec 2019 01:04:28 +0900
Subject: kbuild: do not create orphan built-in.a or obj-y objects

Both 'obj-y += foo/' and 'obj-m += foo/' request Kbuild to visit the
sub-directory foo/, but the difference is that only the former combines
foo/built-in.a into the built-in.a of the current directory because
everything in sub-directories visited by obj-m is supposed to be modular.

So, it makes sense to create built-in.a only if that sub-directory is
reachable by the chain of obj-y. Otherwise, built-in.a will not be
linked into vmlinux anyway. For the same reason, it is pointless to
compile obj-y objects in the directory visited by obj-m.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.build | 2 +-
 scripts/Makefile.lib   | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index b734ac8a654e..e46b4ee9a120 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -66,7 +66,7 @@ lib-target := $(obj)/lib.a
 real-obj-y += $(obj)/lib-ksyms.o
 endif
 
-ifneq ($(strip $(real-obj-y) $(need-builtin)),)
+ifdef need-builtin
 builtin-target := $(obj)/built-in.a
 endif
 
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 3fa32f83b2d7..724aa3e9b4a8 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -35,7 +35,11 @@ __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
 subdir-y	+= $(__subdir-y)
 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
 subdir-m	+= $(__subdir-m)
+ifdef need-builtin
 obj-y		:= $(patsubst %/, %/built-in.a, $(obj-y))
+else
+obj-y		:= $(filter-out %/, $(obj-y))
+endif
 obj-m		:= $(filter-out %/, $(obj-m))
 
 # Subdirectories we need to descend into
-- 
cgit v1.2.3


From a7499267976ce014fbc6f7defe9080367f94d6cc Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 19 Dec 2019 01:05:14 +0900
Subject: kbuild: use pattern rule for building built-in.a in sub-directories

The built-in.a in a sub-directory is created by descending into that
directory. It does not depend on the other sub-directories. Loosen
the dependency.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index e46b4ee9a120..a562d695f0fa 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -372,7 +372,7 @@ $(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
 # ---------------------------------------------------------------------------
 
 # To build objects in subdirs, we need to descend into the directories
-$(sort $(subdir-obj-y)): $(subdir-ym) ;
+$(obj)/%/built-in.a: $(obj)/% ;
 
 #
 # Rule to compile a set of .o files into one .a file (without symbol table)
-- 
cgit v1.2.3


From 7e826c44f5de3be00369d534dc38db485f6f26d5 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 19 Dec 2019 17:33:27 +0900
Subject: kbuild: add stringify helper to quote a string passed to C files

Make $(squote)$(quote)...$(quote)$(squote) a helper macro.
I will reuse it in the next commit.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Kbuild.include | 4 ++++
 scripts/Makefile.lib   | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index bc5f25763c1b..88c144787e57 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -32,6 +32,10 @@ real-prereqs = $(filter-out $(PHONY), $^)
 # Escape single quote for use in echo statements
 escsq = $(subst $(squote),'\$(squote)',$1)
 
+###
+# Quote a string to pass it to C files. foo => '"foo"'
+stringify = $(squote)$(quote)$1$(quote)$(squote)
+
 ###
 # Easy method for doing a status message
        kecho := :
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 724aa3e9b4a8..e5e5339bb575 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -97,7 +97,7 @@ target-stem = $(basename $(patsubst $(obj)/%,%,$@))
 # These flags are needed for modversions and compiling, so we define them here
 # $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
 # end up in (or would, if it gets compiled in)
-name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
+name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1)))
 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
 modname_flags  = -DKBUILD_MODNAME=$(call name-fix,$(modname))
 
-- 
cgit v1.2.3


From 1664a377908ed6096680e9d7cfd28facef2194f2 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 19 Dec 2019 17:33:28 +0900
Subject: kbuild: pass KBUILD_MODFILE when compiling builtin objects

When compiling, Kbuild passes KBUILD_BASENAME (basename of the object)
and KBUILD_MODNAME (basename of the module).

This commit adds another one, KBUILD_MODFILE, which is the path of
the module. (or, the path of the module it would end up in if it were
compiled as a module.)

The next commit will use this to generate modules.builtin without
tristate.conf.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.lib | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index e5e5339bb575..d10f7a03e0ee 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -84,12 +84,14 @@ multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))
 subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))
 
 # Finds the multi-part object the current object will be linked into.
-# If the object belongs to two or more multi-part objects, all of them are
-# concatenated with a colon separator.
-modname-multi = $(subst $(space),:,$(sort $(foreach m,$(multi-used),\
-		$(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=)))))
+# If the object belongs to two or more multi-part objects, list them all.
+modname-multi = $(sort $(foreach m,$(multi-used),\
+		$(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=))))
 
-modname = $(if $(modname-multi),$(modname-multi),$(basetarget))
+__modname = $(if $(modname-multi),$(modname-multi),$(basetarget))
+
+modname = $(subst $(space),:,$(__modname))
+modfile = $(addprefix $(obj)/,$(__modname))
 
 # target with $(obj)/ and its suffix stripped
 target-stem = $(basename $(patsubst $(obj)/%,%,$@))
@@ -100,6 +102,7 @@ target-stem = $(basename $(patsubst $(obj)/%,%,$@))
 name-fix = $(call stringify,$(subst $(comma),_,$(subst -,_,$1)))
 basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
 modname_flags  = -DKBUILD_MODNAME=$(call name-fix,$(modname))
+modfile_flags  = -DKBUILD_MODFILE=$(call stringify,$(modfile))
 
 orig_c_flags   = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \
                  $(ccflags-y) $(CFLAGS_$(target-stem).o)
@@ -158,7 +161,7 @@ quiet_modtag = $(if $(part-of-module),[M],   )
 modkern_cflags =                                          \
 	$(if $(part-of-module),                           \
 		$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
-		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
+		$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
 
 modkern_aflags = $(if $(part-of-module),				\
 			$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE),	\
-- 
cgit v1.2.3


From 8b41fc4454e36fbfdbb23f940d023d4dece2de29 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 19 Dec 2019 17:33:29 +0900
Subject: kbuild: create modules.builtin without Makefile.modbuiltin or
 tristate.conf

Commit bc081dd6e9f6 ("kbuild: generate modules.builtin") added
infrastructure to generate modules.builtin, the list of all
builtin modules.

Basically, it works like this:

  - Kconfig generates include/config/tristate.conf, the list of
    tristate CONFIG options with a value in a capital letter.

  - scripts/Makefile.modbuiltin makes Kbuild descend into
    directories to collect the information of builtin modules.

I am not a big fan of it because Kbuild ends up with traversing
the source tree twice.

I am not sure how perfectly it should work, but this approach cannot
avoid false positives; even if the relevant CONFIG option is tristate,
some Makefiles forces obj-m to obj-y.

Some examples are:

  arch/powerpc/platforms/powermac/Makefile:
    obj-$(CONFIG_NVRAM:m=y)         += nvram.o

  net/ipv6/Makefile:
    obj-$(subst m,y,$(CONFIG_IPV6)) += inet6_hashtables.o

  net/netlabel/Makefile:
    obj-$(subst m,y,$(CONFIG_IPV6)) += netlabel_calipso.o

Nobody has complained about (or noticed) it, so it is probably fine to
have false positives in modules.builtin.

This commit simplifies the implementation. Let's exploit the fact
that every module has MODULE_LICENSE(). (modpost shows a warning if
MODULE_LICENSE is missing. If so, 0-day bot would already have blocked
such a module.)

I added MODULE_FILE to <linux/module.h>. When the code is being compiled
as builtin, it will be filled with the file path of the module, and
collected into modules.builtin.info. Then, scripts/link-vmlinux.sh
extracts the list of builtin modules out of it.

This new approach fixes the false-positives above, but adds another
type of false-positives; non-modular code may have MODULE_LICENSE()
by mistake. This is not a big deal, it is just the code is always
orphan. We can clean it up if we like. You can see cleanup examples by:

  $ git log --grep='make.* explicitly non-modular'

To sum up, this commits deletes lots of code, but still produces almost
equivalent results. Please note it does not increase the vmlinux size at
all. As you can see in include/asm-generic/vmlinux.lds.h, the .modinfo
section is discarded in the link stage.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Documentation/kbuild/kconfig.rst |  5 ----
 Makefile                         | 21 ++++-----------
 include/linux/module.h           | 12 ++++++++-
 scripts/Kbuild.include           |  6 -----
 scripts/Makefile.modbuiltin      | 57 ----------------------------------------
 scripts/kconfig/confdata.c       | 45 ++-----------------------------
 scripts/link-vmlinux.sh          |  4 +++
 7 files changed, 22 insertions(+), 128 deletions(-)
 delete mode 100644 scripts/Makefile.modbuiltin

(limited to 'scripts')

diff --git a/Documentation/kbuild/kconfig.rst b/Documentation/kbuild/kconfig.rst
index a9a855f894b3..dce6801d66c9 100644
--- a/Documentation/kbuild/kconfig.rst
+++ b/Documentation/kbuild/kconfig.rst
@@ -154,11 +154,6 @@ KCONFIG_AUTOCONFIG
 This environment variable can be set to specify the path & name of the
 "auto.conf" file.  Its default value is "include/config/auto.conf".
 
-KCONFIG_TRISTATE
-----------------
-This environment variable can be set to specify the path & name of the
-"tristate.conf" file.  Its default value is "include/config/tristate.conf".
-
 KCONFIG_AUTOHEADER
 ------------------
 This environment variable can be set to specify the path & name of the
diff --git a/Makefile b/Makefile
index e4c2d0327d8c..4f01de6cd43c 100644
--- a/Makefile
+++ b/Makefile
@@ -674,7 +674,7 @@ $(KCONFIG_CONFIG):
 #
 # This exploits the 'multi-target pattern rule' trick.
 # The syncconfig should be executed only once to make all the targets.
-%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
+%/auto.conf %/auto.conf.cmd: $(KCONFIG_CONFIG)
 	$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
 else # !may-sync-config
 # External modules and some install targets need include/generated/autoconf.h
@@ -1278,24 +1278,13 @@ all: modules
 # using awk while concatenating to the final file.
 
 PHONY += modules
-modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
+modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
 
 modules.order: descend
 	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
 
-modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
-
-modules.builtin: $(modbuiltin-dirs)
-	$(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
-
-PHONY += $(modbuiltin-dirs)
-# tristate.conf is not included from this Makefile. Add it as a prerequisite
-# here to make it self-healing in case somebody accidentally removes it.
-$(modbuiltin-dirs): include/config/tristate.conf
-	$(Q)$(MAKE) $(modbuiltin)=$(patsubst _modbuiltin_%,%,$@)
-
 # Target to prepare building external modules
 PHONY += modules_prepare
 modules_prepare: prepare
@@ -1315,7 +1304,7 @@ _modinst_:
 		ln -s $(CURDIR) $(MODLIB)/build ; \
 	fi
 	@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
-	@sed 's:^:kernel/:' modules.builtin > $(MODLIB)/modules.builtin
+	@cp -f modules.builtin $(MODLIB)/
 	@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
@@ -1357,7 +1346,7 @@ endif # CONFIG_MODULES
 
 # Directories & files removed with 'make clean'
 CLEAN_DIRS  += include/ksym
-CLEAN_FILES += modules.builtin.modinfo modules.nsdeps
+CLEAN_FILES += modules.builtin modules.builtin.modinfo modules.nsdeps
 
 # Directories & files removed with 'make mrproper'
 MRPROPER_DIRS  += include/config include/generated          \
@@ -1712,7 +1701,7 @@ clean: $(clean-dirs)
 		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
 		-o -name '*.asn1.[ch]' \
 		-o -name '*.symtypes' -o -name 'modules.order' \
-		-o -name modules.builtin -o -name '.tmp_*.o.*' \
+		-o -name '.tmp_*.o.*' \
 		-o -name '*.c.[012]*.*' \
 		-o -name '*.ll' \
 		-o -name '*.gcno' \) -type f -print | xargs rm -f
diff --git a/include/linux/module.h b/include/linux/module.h
index bd165ba68617..6877b3b191d0 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -169,6 +169,16 @@ extern void cleanup_module(void);
  */
 #define MODULE_SOFTDEP(_softdep) MODULE_INFO(softdep, _softdep)
 
+/*
+ * MODULE_FILE is used for generating modules.builtin
+ * So, make it no-op when this is being built as a module
+ */
+#ifdef MODULE
+#define MODULE_FILE
+#else
+#define MODULE_FILE	MODULE_INFO(file, KBUILD_MODFILE);
+#endif
+
 /*
  * The following license idents are currently accepted as indicating free
  * software modules
@@ -213,7 +223,7 @@ extern void cleanup_module(void);
  * 2.	So the community can ignore bug reports including proprietary modules
  * 3.	So vendors can do likewise based on their own policies
  */
-#define MODULE_LICENSE(_license) MODULE_INFO(license, _license)
+#define MODULE_LICENSE(_license) MODULE_FILE MODULE_INFO(license, _license)
 
 /*
  * Author(s), use "Name <email>" or just "Name", for multiple
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 88c144787e57..3da8321efb74 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -163,12 +163,6 @@ ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
 # $(Q)$(MAKE) $(build)=dir
 build := -f $(srctree)/scripts/Makefile.build obj
 
-###
-# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
-# Usage:
-# $(Q)$(MAKE) $(modbuiltin)=dir
-modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
-
 ###
 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
 # Usage:
diff --git a/scripts/Makefile.modbuiltin b/scripts/Makefile.modbuiltin
deleted file mode 100644
index 7d4711b88656..000000000000
--- a/scripts/Makefile.modbuiltin
+++ /dev/null
@@ -1,57 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-# ==========================================================================
-# Generating modules.builtin
-# ==========================================================================
-
-src := $(obj)
-
-PHONY := __modbuiltin
-__modbuiltin:
-
-include include/config/auto.conf
-# tristate.conf sets tristate variables to uppercase 'Y' or 'M'
-# That way, we get the list of built-in modules in obj-Y
-include include/config/tristate.conf
-
-include scripts/Kbuild.include
-
-ifdef building_out_of_srctree
-# Create output directory if not already present
-_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
-endif
-
-# The filename Kbuild has precedence over Makefile
-kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
-kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
-include $(kbuild-file)
-
-include scripts/Makefile.lib
-__subdir-Y     := $(patsubst %/,%,$(filter %/, $(obj-Y)))
-subdir-Y       += $(__subdir-Y)
-subdir-ym      := $(sort $(subdir-y) $(subdir-Y) $(subdir-m))
-subdir-ym      := $(addprefix $(obj)/,$(subdir-ym))
-obj-Y          := $(addprefix $(obj)/,$(obj-Y))
-
-modbuiltin-subdirs := $(patsubst %,%/modules.builtin, $(subdir-ym))
-modbuiltin-mods    := $(filter %.ko, $(obj-Y:.o=.ko))
-modbuiltin-target  := $(obj)/modules.builtin
-
-__modbuiltin: $(modbuiltin-target) $(subdir-ym)
-	@:
-
-$(modbuiltin-target): $(subdir-ym) FORCE
-	$(Q)(for m in $(modbuiltin-mods); do echo $$m; done;	\
-	cat /dev/null $(modbuiltin-subdirs)) > $@
-
-PHONY += FORCE
-
-FORCE:
-
-# Descending
-# ---------------------------------------------------------------------------
-
-PHONY += $(subdir-ym)
-$(subdir-ym):
-	$(Q)$(MAKE) $(modbuiltin)=$@
-
-.PHONY: $(PHONY)
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 3569d2dec37c..fb675bd9a809 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -710,25 +710,6 @@ static struct conf_printer header_printer_cb =
 	.print_comment = header_print_comment,
 };
 
-/*
- * Tristate printer
- *
- * This printer is used when generating the `include/config/tristate.conf' file.
- */
-static void
-tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
-{
-
-	if (sym->type == S_TRISTATE && *value != 'n')
-		fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
-}
-
-static struct conf_printer tristate_printer_cb =
-{
-	.print_symbol = tristate_print_symbol,
-	.print_comment = kconfig_print_comment,
-};
-
 static void conf_write_symbol(FILE *fp, struct symbol *sym,
 			      struct conf_printer *printer, void *printer_arg)
 {
@@ -1062,7 +1043,7 @@ int conf_write_autoconf(int overwrite)
 	struct symbol *sym;
 	const char *name;
 	const char *autoconf_name = conf_get_autoconfig_name();
-	FILE *out, *tristate, *out_h;
+	FILE *out, *out_h;
 	int i;
 
 	if (!overwrite && is_present(autoconf_name))
@@ -1077,23 +1058,13 @@ int conf_write_autoconf(int overwrite)
 	if (!out)
 		return 1;
 
-	tristate = fopen(".tmpconfig_tristate", "w");
-	if (!tristate) {
-		fclose(out);
-		return 1;
-	}
-
 	out_h = fopen(".tmpconfig.h", "w");
 	if (!out_h) {
 		fclose(out);
-		fclose(tristate);
 		return 1;
 	}
 
 	conf_write_heading(out, &kconfig_printer_cb, NULL);
-
-	conf_write_heading(tristate, &tristate_printer_cb, NULL);
-
 	conf_write_heading(out_h, &header_printer_cb, NULL);
 
 	for_all_symbols(i, sym) {
@@ -1101,15 +1072,11 @@ int conf_write_autoconf(int overwrite)
 		if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
 			continue;
 
-		/* write symbol to auto.conf, tristate and header files */
+		/* write symbols to auto.conf and autoconf.h */
 		conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
-
-		conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
-
 		conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
 	}
 	fclose(out);
-	fclose(tristate);
 	fclose(out_h);
 
 	name = getenv("KCONFIG_AUTOHEADER");
@@ -1120,14 +1087,6 @@ int conf_write_autoconf(int overwrite)
 	if (rename(".tmpconfig.h", name))
 		return 1;
 
-	name = getenv("KCONFIG_TRISTATE");
-	if (!name)
-		name = "include/config/tristate.conf";
-	if (make_parent_dir(name))
-		return 1;
-	if (rename(".tmpconfig_tristate", name))
-		return 1;
-
 	if (make_parent_dir(autoconf_name))
 		return 1;
 	/*
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 436379940356..bf0bf9063aaf 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -250,6 +250,10 @@ ${MAKE} -f "${srctree}/scripts/Makefile.modpost" MODPOST_VMLINUX=1
 
 info MODINFO modules.builtin.modinfo
 ${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo
+info GEN modules.builtin
+# The second line aids cases where multiple modules share the same object.
+tr '\0' '\n' < modules.builtin.modinfo | sed -n 's/^[[:alnum:]:_]*\.file=//p' |
+	tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$/.ko/' > modules.builtin
 
 btf_vmlinux_bin_o=""
 if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
-- 
cgit v1.2.3


From f64048a20b0ce1bb1fd5c3f80e82556db73fe08b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:16 +0900
Subject: kconfig: remove the rootmenu check in menu_add_prop()

This reverts commit ba6ff60d5eb4 ("kconfig: don't emit warning upon
rootmenu's prompt redefinition").

At that time, rootmenu.prompt was always set first, then it was set
again if a "mainmenu" statement was specified in the Kconfig file.

This is no longer the case since commit 0724a7c32a54 ("kconfig: Don't
leak main menus during parsing"). Remove the unneeded check.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/menu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index d9d16469859a..b1b1ee8cf987 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -138,7 +138,7 @@ static struct property *menu_add_prop(enum prop_type type, char *prompt, struct
 			while (isspace(*prompt))
 				prompt++;
 		}
-		if (current_entry->prompt && current_entry != &rootmenu)
+		if (current_entry->prompt)
 			prop_warn(prop, "prompt redefined");
 
 		/* Apply all upper menus' visibilities to actual prompts. */
-- 
cgit v1.2.3


From de026ca9152c3b3d8c85b8884a29040975ac1424 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:17 +0900
Subject: kconfig: use parent->dep as the parentdep of 'menu'

In menu_finalize(), the dependency of a menu entry is propagated
downwards.

For the 'menu', parent->dep and parent->prompt->visible.expr have
the same expression. Both accumulate the 'depends on' of itself and
upper menu entries.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/menu.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index b1b1ee8cf987..bbabf0a59ac4 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -326,12 +326,10 @@ void menu_finalize(struct menu *parent)
 			 * choice value symbols.
 			 */
 			parentdep = expr_alloc_symbol(sym);
-		} else if (parent->prompt)
-			/* Menu node for 'menu' */
-			parentdep = parent->prompt->visible.expr;
-		else
-			/* Menu node for 'if' */
+		} else {
+			/* Menu node for 'menu', 'if' */
 			parentdep = parent->dep;
+		}
 
 		/* For each child menu node... */
 		for (menu = parent->list; menu; menu = menu->next) {
-- 
cgit v1.2.3


From 801b27db4638da1a7681865f2c6aab5270c5a29b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:18 +0900
Subject: kconfig: drop T_WORD from the RHS of 'prompt' symbol

Commit 8636a1f9677d ("treewide: surround Kconfig file paths with double
quotes") killed use-cases to reduce an unquoted string into the 'prompt'
symbol.

Kconfig still allows to use an unquoted string in the context of menu,
source, or prompt.

So, you can omit quoting if the prompt is a single word:

    bool foo

..., but I do not think this is so useful.

Let's require quoting:

    bool "foo"

All the Kconfig files in the kernel are written in this way.

Remove the T_WORD from the right-hand side of the symbol 'prompt'.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/parser.y | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/parser.y b/scripts/kconfig/parser.y
index b3eff9613cf8..57f1225214cb 100644
--- a/scripts/kconfig/parser.y
+++ b/scripts/kconfig/parser.y
@@ -434,9 +434,7 @@ prompt_stmt_opt:
 	menu_add_prompt(P_PROMPT, $1, $2);
 };
 
-prompt:	  T_WORD
-	| T_WORD_QUOTE
-;
+prompt:	  T_WORD_QUOTE
 
 end:	  T_ENDMENU T_EOL	{ $$ = "menu"; }
 	| T_ENDCHOICE T_EOL	{ $$ = "choice"; }
-- 
cgit v1.2.3


From 1be6e791383a92e168662089dc956828dd33f0ff Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:19 +0900
Subject: kconfig: remove 'prompt' symbol

Now that 'prompt' is only reduced from T_WORD_QUOTE without any action,
use T_WORD_QUOTE directly.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/parser.y | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/parser.y b/scripts/kconfig/parser.y
index 57f1225214cb..af770bf758ad 100644
--- a/scripts/kconfig/parser.y
+++ b/scripts/kconfig/parser.y
@@ -90,7 +90,6 @@ static struct menu *current_menu, *current_entry;
 %left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL
 %nonassoc T_NOT
 
-%type <string> prompt
 %type <symbol> nonconst_symbol
 %type <symbol> symbol
 %type <type> type logic_type default
@@ -113,7 +112,7 @@ input: mainmenu_stmt stmt_list | stmt_list;
 
 /* mainmenu entry */
 
-mainmenu_stmt: T_MAINMENU prompt T_EOL
+mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL
 {
 	menu_add_prompt(P_MENU, $2, NULL);
 };
@@ -181,7 +180,7 @@ config_option: type prompt_stmt_opt T_EOL
 		$1);
 };
 
-config_option: T_PROMPT prompt if_expr T_EOL
+config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
 {
 	menu_add_prompt(P_PROMPT, $2, $3);
 	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
@@ -265,7 +264,7 @@ choice_option_list:
 	| choice_option_list help
 ;
 
-choice_option: T_PROMPT prompt if_expr T_EOL
+choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL
 {
 	menu_add_prompt(P_PROMPT, $2, $3);
 	printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
@@ -334,7 +333,7 @@ if_stmt: if_entry stmt_list if_end
 
 /* menu entry */
 
-menu: T_MENU prompt T_EOL
+menu: T_MENU T_WORD_QUOTE T_EOL
 {
 	menu_add_entry(NULL);
 	menu_add_prompt(P_MENU, $2, NULL);
@@ -363,7 +362,7 @@ menu_option_list:
 	| menu_option_list depends
 ;
 
-source_stmt: T_SOURCE prompt T_EOL
+source_stmt: T_SOURCE T_WORD_QUOTE T_EOL
 {
 	printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
 	zconf_nextfile($2);
@@ -372,7 +371,7 @@ source_stmt: T_SOURCE prompt T_EOL
 
 /* comment entry */
 
-comment: T_COMMENT prompt T_EOL
+comment: T_COMMENT T_WORD_QUOTE T_EOL
 {
 	menu_add_entry(NULL);
 	menu_add_prompt(P_COMMENT, $2, NULL);
@@ -429,13 +428,11 @@ visible: T_VISIBLE if_expr T_EOL
 
 prompt_stmt_opt:
 	  /* empty */
-	| prompt if_expr
+	| T_WORD_QUOTE if_expr
 {
 	menu_add_prompt(P_PROMPT, $1, $2);
 };
 
-prompt:	  T_WORD_QUOTE
-
 end:	  T_ENDMENU T_EOL	{ $$ = "menu"; }
 	| T_ENDCHOICE T_EOL	{ $$ = "choice"; }
 	| T_ENDIF T_EOL		{ $$ = "if"; }
-- 
cgit v1.2.3


From 024352ff8d696e95a8601970f98a66d836e30549 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:20 +0900
Subject: kconfig: move prompt handling to menu_add_prompt() from
 menu_add_prop()

menu_add_prompt() is the only function that calls menu_add_prop() with
non-NULL prompt.

So, the code inside the if-conditional block of menu_add_prop() can be
moved to menu_add_prompt().

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/menu.c | 70 ++++++++++++++++++++++++--------------------------
 1 file changed, 34 insertions(+), 36 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index bbabf0a59ac4..45daece8d983 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -132,53 +132,51 @@ static struct property *menu_add_prop(enum prop_type type, char *prompt, struct
 	prop->expr = expr;
 	prop->visible.expr = dep;
 
-	if (prompt) {
-		if (isspace(*prompt)) {
-			prop_warn(prop, "leading whitespace ignored");
-			while (isspace(*prompt))
-				prompt++;
-		}
-		if (current_entry->prompt)
-			prop_warn(prop, "prompt redefined");
+	return prop;
+}
 
-		/* Apply all upper menus' visibilities to actual prompts. */
-		if(type == P_PROMPT) {
-			struct menu *menu = current_entry;
+struct property *menu_add_prompt(enum prop_type type, char *prompt,
+				 struct expr *dep)
+{
+	struct property *prop = menu_add_prop(type, prompt, NULL, dep);
 
-			while ((menu = menu->parent) != NULL) {
-				struct expr *dup_expr;
+	if (isspace(*prompt)) {
+		prop_warn(prop, "leading whitespace ignored");
+		while (isspace(*prompt))
+			prompt++;
+	}
+	if (current_entry->prompt)
+		prop_warn(prop, "prompt redefined");
 
-				if (!menu->visibility)
-					continue;
-				/*
-				 * Do not add a reference to the
-				 * menu's visibility expression but
-				 * use a copy of it.  Otherwise the
-				 * expression reduction functions
-				 * will modify expressions that have
-				 * multiple references which can
-				 * cause unwanted side effects.
-				 */
-				dup_expr = expr_copy(menu->visibility);
+	/* Apply all upper menus' visibilities to actual prompts. */
+	if (type == P_PROMPT) {
+		struct menu *menu = current_entry;
 
-				prop->visible.expr
-					= expr_alloc_and(prop->visible.expr,
-							 dup_expr);
-			}
-		}
+		while ((menu = menu->parent) != NULL) {
+			struct expr *dup_expr;
 
-		current_entry->prompt = prop;
+			if (!menu->visibility)
+				continue;
+			/*
+			 * Do not add a reference to the menu's visibility
+			 * expression but use a copy of it. Otherwise the
+			 * expression reduction functions will modify
+			 * expressions that have multiple references which
+			 * can cause unwanted side effects.
+			 */
+			dup_expr = expr_copy(menu->visibility);
+
+			prop->visible.expr = expr_alloc_and(prop->visible.expr,
+							    dup_expr);
+		}
 	}
+
+	current_entry->prompt = prop;
 	prop->text = prompt;
 
 	return prop;
 }
 
-struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep)
-{
-	return menu_add_prop(type, prompt, NULL, dep);
-}
-
 void menu_add_visibility(struct expr *expr)
 {
 	current_entry->visibility = expr_alloc_and(current_entry->visibility,
-- 
cgit v1.2.3


From 2ffeef615b5e6ac452f55fd6277dc44a667c7c8c Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:21 +0900
Subject: kconfig: remove 'prompt' argument from menu_add_prop()

This function no longer uses the 'prompt' argument.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/menu.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 45daece8d983..5a43784ded2c 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -124,7 +124,8 @@ void menu_set_type(int type)
 		sym_type_name(sym->type), sym_type_name(type));
 }
 
-static struct property *menu_add_prop(enum prop_type type, char *prompt, struct expr *expr, struct expr *dep)
+static struct property *menu_add_prop(enum prop_type type, struct expr *expr,
+				      struct expr *dep)
 {
 	struct property *prop = prop_alloc(type, current_entry->sym);
 
@@ -138,7 +139,7 @@ static struct property *menu_add_prop(enum prop_type type, char *prompt, struct
 struct property *menu_add_prompt(enum prop_type type, char *prompt,
 				 struct expr *dep)
 {
-	struct property *prop = menu_add_prop(type, prompt, NULL, dep);
+	struct property *prop = menu_add_prop(type, NULL, dep);
 
 	if (isspace(*prompt)) {
 		prop_warn(prop, "leading whitespace ignored");
@@ -185,12 +186,12 @@ void menu_add_visibility(struct expr *expr)
 
 void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep)
 {
-	menu_add_prop(type, NULL, expr, dep);
+	menu_add_prop(type, expr, dep);
 }
 
 void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep)
 {
-	menu_add_prop(type, NULL, expr_alloc_symbol(sym), dep);
+	menu_add_prop(type, expr_alloc_symbol(sym), dep);
 }
 
 void menu_add_option_modules(void)
-- 
cgit v1.2.3


From 6397d96ba5a52c57ee1831a4ddc3aab01bb02048 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:22 +0900
Subject: kconfig: remove sym from struct property

struct property can reference to the symbol that it is associated with
by prop->menu->sym.

Fix up the one usage of prop->sym, and remove sym from struct property.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/expr.h   | 1 -
 scripts/kconfig/parser.y | 2 +-
 scripts/kconfig/symbol.c | 1 -
 3 files changed, 1 insertion(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 017843c9a4f4..6e102a3b8bd5 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -191,7 +191,6 @@ enum prop_type {
 
 struct property {
 	struct property *next;     /* next property - null if last */
-	struct symbol *sym;        /* the symbol for which the property is associated */
 	enum prop_type type;       /* type of property */
 	const char *text;          /* the prompt value - P_PROMPT, P_MENU, P_COMMENT */
 	struct expr_value visible;
diff --git a/scripts/kconfig/parser.y b/scripts/kconfig/parser.y
index af770bf758ad..708b6c4b13ca 100644
--- a/scripts/kconfig/parser.y
+++ b/scripts/kconfig/parser.y
@@ -660,7 +660,7 @@ static void print_symbol(FILE *out, struct menu *menu)
 			break;
 		case P_SYMBOL:
 			fputs( "  symbol ", out);
-			fprintf(out, "%s\n", prop->sym->name);
+			fprintf(out, "%s\n", prop->menu->sym->name);
 			break;
 		default:
 			fprintf(out, "  unknown prop %d!\n", prop->type);
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index f56eec5ea4c7..dbc5365d8bbc 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -1281,7 +1281,6 @@ struct property *prop_alloc(enum prop_type type, struct symbol *sym)
 	prop = xmalloc(sizeof(*prop));
 	memset(prop, 0, sizeof(*prop));
 	prop->type = type;
-	prop->sym = sym;
 	prop->file = current_file;
 	prop->lineno = zconf_lineno();
 
-- 
cgit v1.2.3


From adf7c5bd0674b04588246e444efef9987b2f1a6b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:14:23 +0900
Subject: kconfig: squash prop_alloc() into menu_add_prop()

prop_alloc() is only called from menu_add_prop(). Squash it.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/lkc.h    |  1 -
 scripts/kconfig/menu.c   | 18 +++++++++++++++++-
 scripts/kconfig/symbol.c | 21 ---------------------
 3 files changed, 17 insertions(+), 23 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 4fb16f316626..73d3f01f1736 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -112,7 +112,6 @@ struct symbol *sym_choice_default(struct symbol *sym);
 struct property *sym_get_range_prop(struct symbol *sym);
 const char *sym_get_string_default(struct symbol *sym);
 struct symbol *sym_check_deps(struct symbol *sym);
-struct property *prop_alloc(enum prop_type type, struct symbol *sym);
 struct symbol *prop_get_symbol(struct property *prop);
 
 static inline tristate sym_get_tristate_value(struct symbol *sym)
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 5a43784ded2c..8b772ced755d 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -127,12 +127,28 @@ void menu_set_type(int type)
 static struct property *menu_add_prop(enum prop_type type, struct expr *expr,
 				      struct expr *dep)
 {
-	struct property *prop = prop_alloc(type, current_entry->sym);
+	struct property *prop;
 
+	prop = xmalloc(sizeof(*prop));
+	memset(prop, 0, sizeof(*prop));
+	prop->type = type;
+	prop->file = current_file;
+	prop->lineno = zconf_lineno();
 	prop->menu = current_entry;
 	prop->expr = expr;
 	prop->visible.expr = dep;
 
+	/* append property to the prop list of symbol */
+	if (current_entry->sym) {
+		struct property **propp;
+
+		for (propp = &current_entry->sym->prop;
+		     *propp;
+		     propp = &(*propp)->next)
+			;
+		*propp = prop;
+	}
+
 	return prop;
 }
 
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index dbc5365d8bbc..8d38b700b314 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -1273,27 +1273,6 @@ struct symbol *sym_check_deps(struct symbol *sym)
 	return sym2;
 }
 
-struct property *prop_alloc(enum prop_type type, struct symbol *sym)
-{
-	struct property *prop;
-	struct property **propp;
-
-	prop = xmalloc(sizeof(*prop));
-	memset(prop, 0, sizeof(*prop));
-	prop->type = type;
-	prop->file = current_file;
-	prop->lineno = zconf_lineno();
-
-	/* append property to the prop list of symbol */
-	if (sym) {
-		for (propp = &sym->prop; *propp; propp = &(*propp)->next)
-			;
-		*propp = prop;
-	}
-
-	return prop;
-}
-
 struct symbol *prop_get_symbol(struct property *prop)
 {
 	if (prop->expr && (prop->expr->type == E_SYMBOL ||
-- 
cgit v1.2.3


From 5edcef8454a4efb10a5cebdfbf284bcaf8b85451 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:16:36 +0900
Subject: kconfig: localmodconfig: remove unused $config

This is unused since commit cdfc47950a53 ("kconfig: search for a config
to base the local(mod|yes)config on").

Having unused $config is confusing because $config is used as a local
variable in various sub-routines.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/streamline_config.pl | 2 --
 1 file changed, 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 08d76d7b3b81..bbaa1e11a4e9 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -56,8 +56,6 @@ sub dprint {
     print STDERR @_;
 }
 
-my $config = ".config";
-
 my $uname = `uname -r`;
 chomp $uname;
 
-- 
cgit v1.2.3


From 68f0d62746bc7d20c10a565a562baaf968d86415 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:16:37 +0900
Subject: kconfig: localmodconfig: fix indentation for closing brace

This is the closing brace for the foreach loop. Fix the misleading
indentation.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/streamline_config.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index bbaa1e11a4e9..e2f8504f5a2d 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -372,7 +372,7 @@ if (defined($lsmod_file)) {
 	    $lsmod = "$dir/lsmod";
 	    last;
 	}
-}
+    }
     if (!defined($lsmod)) {
 	# try just the path
 	$lsmod = "lsmod";
-- 
cgit v1.2.3


From 1d1352373ebcc627172132f261ea46df0cec767e Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:18:18 +0900
Subject: kconfig: fix too deep indentation in Makefile

The indentation for if ... else ... fi is too deep. Fix it.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/Makefile | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 2f1a59fa5169..f826a257d576 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -48,15 +48,15 @@ build_xconfig: $(obj)/qconf
 
 localyesconfig localmodconfig: $(obj)/conf
 	$(Q)perl $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
-	$(Q)if [ -f .config ]; then 					\
-			cmp -s .tmp.config .config ||			\
-			(mv -f .config .config.old.1;			\
-			 mv -f .tmp.config .config;			\
-			 $< $(silent) --oldconfig $(Kconfig);		\
-			 mv -f .config.old.1 .config.old)		\
-	else								\
-			mv -f .tmp.config .config;			\
-			$< $(silent) --oldconfig $(Kconfig);		\
+	$(Q)if [ -f .config ]; then 				\
+		cmp -s .tmp.config .config ||			\
+		(mv -f .config .config.old.1;			\
+		 mv -f .tmp.config .config;			\
+		 $< $(silent) --oldconfig $(Kconfig);		\
+		 mv -f .config.old.1 .config.old)		\
+	else							\
+		mv -f .tmp.config .config;			\
+		$< $(silent) --oldconfig $(Kconfig);		\
 	fi
 	$(Q)rm -f .tmp.config
 
-- 
cgit v1.2.3


From c8138a57bbd1a13a2e23d34d3f8f338dd5b526ca Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 17 Dec 2019 13:18:19 +0900
Subject: kconfig: use $(PERL) in Makefile

The top Makefile defines and exports the variable 'PERL'. Use it in
case somebody wants to specify a particular version of perl from the
command line.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index f826a257d576..953a2859302c 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -47,7 +47,7 @@ build_gconfig: $(obj)/gconf
 build_xconfig: $(obj)/qconf
 
 localyesconfig localmodconfig: $(obj)/conf
-	$(Q)perl $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
+	$(Q)$(PERL) $(srctree)/$(src)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config
 	$(Q)if [ -f .config ]; then 				\
 		cmp -s .tmp.config .config ||			\
 		(mv -f .config .config.old.1;			\
-- 
cgit v1.2.3


From 89b9060987d988333de59dd218c9666bd7ee95a5 Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Date: Tue, 17 Dec 2019 18:42:06 +0900
Subject: kconfig: Add yes2modconfig and mod2yesconfig targets.

Since kernel configs provided by syzbot are close to "make allyesconfig",
it takes long time to rebuild. This is especially waste of time when we
need to rebuild for many times (e.g. doing manual printk() inspection,
bisect operations).

We can save time if we can exclude modules which are irrelevant to each
problem. But "make localmodconfig" cannot exclude modules which are built
into vmlinux because /sbin/lsmod output is used as the source of modules.

Therefore, this patch adds "make yes2modconfig" which converts from =y
to =m if possible. After confirming that the interested problem is still
reproducible, we can try "make localmodconfig" (and/or manually tune
based on "Modules linked in:" line) in order to exclude modules which are
irrelevant to the interested problem. While we are at it, this patch also
adds "make mod2yesconfig" which converts from =m to =y in case someone
wants to convert from =m to =y after "make localmodconfig".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/Makefile   |  4 +++-
 scripts/kconfig/conf.c     | 16 ++++++++++++++++
 scripts/kconfig/confdata.c | 16 ++++++++++++++++
 scripts/kconfig/lkc.h      |  3 +++
 4 files changed, 38 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 953a2859302c..fbeb62ae3401 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -67,7 +67,7 @@ localyesconfig localmodconfig: $(obj)/conf
 #  deprecated for external use
 simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
 	alldefconfig randconfig listnewconfig olddefconfig syncconfig \
-	helpnewconfig
+	helpnewconfig yes2modconfig mod2yesconfig
 
 PHONY += $(simple-targets)
 
@@ -135,6 +135,8 @@ help:
 	@echo  '  allmodconfig	  - New config selecting modules when possible'
 	@echo  '  alldefconfig    - New config with all symbols set to default'
 	@echo  '  randconfig	  - New config with random answer to all options'
+	@echo  '  yes2modconfig	  - Change answers from yes to mod if possible'
+	@echo  '  mod2yesconfig	  - Change answers from mod to yes if possible'
 	@echo  '  listnewconfig   - List new options'
 	@echo  '  helpnewconfig   - List new options and help text'
 	@echo  '  olddefconfig	  - Same as oldconfig but sets new symbols to their'
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 1f89bf1558ce..f6e548b8f795 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -34,6 +34,8 @@ enum input_mode {
 	listnewconfig,
 	helpnewconfig,
 	olddefconfig,
+	yes2modconfig,
+	mod2yesconfig,
 };
 static enum input_mode input_mode = oldaskconfig;
 
@@ -467,6 +469,8 @@ static struct option long_opts[] = {
 	{"listnewconfig",   no_argument,       NULL, listnewconfig},
 	{"helpnewconfig",   no_argument,       NULL, helpnewconfig},
 	{"olddefconfig",    no_argument,       NULL, olddefconfig},
+	{"yes2modconfig",   no_argument,       NULL, yes2modconfig},
+	{"mod2yesconfig",   no_argument,       NULL, mod2yesconfig},
 	{NULL, 0, NULL, 0}
 };
 
@@ -489,6 +493,8 @@ static void conf_usage(const char *progname)
 	printf("  --allmodconfig          New config where all options are answered with mod\n");
 	printf("  --alldefconfig          New config with all symbols set to default\n");
 	printf("  --randconfig            New config with random answer to all options\n");
+	printf("  --yes2modconfig         Change answers from yes to mod if possible\n");
+	printf("  --mod2yesconfig         Change answers from mod to yes if possible\n");
 }
 
 int main(int ac, char **av)
@@ -553,6 +559,8 @@ int main(int ac, char **av)
 		case listnewconfig:
 		case helpnewconfig:
 		case olddefconfig:
+		case yes2modconfig:
+		case mod2yesconfig:
 			break;
 		case '?':
 			conf_usage(progname);
@@ -587,6 +595,8 @@ int main(int ac, char **av)
 	case listnewconfig:
 	case helpnewconfig:
 	case olddefconfig:
+	case yes2modconfig:
+	case mod2yesconfig:
 		conf_read(NULL);
 		break;
 	case allnoconfig:
@@ -660,6 +670,12 @@ int main(int ac, char **av)
 		break;
 	case savedefconfig:
 		break;
+	case yes2modconfig:
+		conf_rewrite_mod_or_yes(def_y2m);
+		break;
+	case mod2yesconfig:
+		conf_rewrite_mod_or_yes(def_m2y);
+		break;
 	case oldaskconfig:
 		rootEntry = &rootmenu;
 		conf(&rootmenu);
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 3569d2dec37c..99f2418baa6c 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -1362,3 +1362,19 @@ bool conf_set_all_new_symbols(enum conf_def_mode mode)
 
 	return has_changed;
 }
+
+void conf_rewrite_mod_or_yes(enum conf_def_mode mode)
+{
+	struct symbol *sym;
+	int i;
+	tristate old_val = (mode == def_y2m) ? yes : mod;
+	tristate new_val = (mode == def_y2m) ? mod : yes;
+
+	for_all_symbols(i, sym) {
+		if (sym_get_type(sym) == S_TRISTATE &&
+		    sym->def[S_DEF_USER].tri == old_val) {
+			sym->def[S_DEF_USER].tri = new_val;
+			sym_add_change_count(1);
+		}
+	}
+}
diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index 73d3f01f1736..d4ca8297364f 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -34,6 +34,8 @@ enum conf_def_mode {
 	def_default,
 	def_yes,
 	def_mod,
+	def_y2m,
+	def_m2y,
 	def_no,
 	def_random
 };
@@ -52,6 +54,7 @@ const char *conf_get_configname(void);
 void sym_set_change_count(int count);
 void sym_add_change_count(int count);
 bool conf_set_all_new_symbols(enum conf_def_mode mode);
+void conf_rewrite_mod_or_yes(enum conf_def_mode mode);
 void set_all_choice_values(struct symbol *csym);
 
 /* confdata.c and expr.c */
-- 
cgit v1.2.3


From edda15f2197425c1aca8d1dd24a9bb3144686c7b Mon Sep 17 00:00:00 2001
From: Thomas Hebb <tommyhebb@gmail.com>
Date: Tue, 17 Dec 2019 08:15:43 -0800
Subject: kconfig: list all definitions of a symbol in help text

In Kconfig, each symbol (representing a config option) can be defined in
multiple places. Each definition may or may not have a prompt, which
allows the option to be set via an interface like menuconfig. Each
definition has a set of dependencies, which determine whether its prompt
is visible and whether other pieces of the definition, like a default
value, take effect.

Historically, a symbol's help text (i.e. what's shown when a user
presses '?' in menuconfig) contained some symbol-wide information not
tied to any particular definition (e.g. what other symbols it selects)
as well as the location (file name and line number) and dependencies of
each prompt. Notably, the help text did not show the location or
dependencies of definitions without prompts.

Because this made it hard to reason about symbols that had no prompts,
commit bcdedcc1afd6 ("menuconfig: print more info for symbol without
prompts") changed the help text so that, instead of containing the
location and dependencies of each prompt, it contained the location and
dependencies of the symbol's first definition, regardless of whether or
not that definition had a prompt.

For symbols with only one definition, that change makes sense. However,
it breaks down for symbols with multiple definitions: each definition
has its own set of dependencies (the `dep` field of `struct menu`), and
those dependencies are ORed together to get the symbol's dependency list
(the `dir_dep` field of `struct symbol`). By printing only the
dependencies of the first definition, the help text misleads users into
believing that an option is more narrowly-applicable than it actually
is.

For an extreme example of this, we can look at the SYS_TEXT_BASE symbol
in the Das U-Boot project (version 2019.10), which also uses Kconfig. (I
unfortunately could not find an illustrative example in Linux.) This
config option specifies the load address of the built binary and, as
such, is applicable to basically every configuration possible. And yet,
without this patch, its help text is as follows:

  Symbol: SYS_TEXT_BASE [=]
  Type  : hex
  Prompt: U-Boot base address
    Location:
      -> ARM architecture
  Prompt: Text Base
    Location:
      -> Boot images
    Defined at arch/arm/mach-aspeed/Kconfig:9
    Depends on: ARM [=n] && ARCH_ASPEED [=n]

The help text indicates that the option is applicable only for a
specific unselected architecture (aspeed), because that architecture's
promptless definition (which just sets a default value), happens to be
the first one seen. No definition or dependency information is printed
for either of the two prompts listed.

Because source locations and dependencies are fundamentally properties
of definitions and not of symbols, we should treat them as such. This
patch brings back the pre-bcdedcc1afd6 behavior for definitions with
prompts but also separately prints the location and dependencies of
those without prompts, solving the original problem in a different way.
With this change, our SYS_TEXT_BASE example becomes

   Symbol: SYS_TEXT_BASE [=]
   Type  : hex
   Defined at arch/arm/mach-stm32mp/Kconfig:83
     Prompt: U-Boot base address
     Depends on: ARM [=n] && ARCH_STM32MP [=n]
     Location:
       -> ARM architecture
   Defined at Kconfig:532
     Prompt: Text Base
     Depends on: !NIOS2 [=n] && !XTENSA [=n] && !EFI_APP [=n]
     Location:
       -> Boot images
   Defined at arch/arm/mach-aspeed/Kconfig:9
     Depends on: ARM [=n] && ARCH_ASPEED [=n]
   Defined  at arch/arm/mach-socfpga/Kconfig:25
     Depends on: ARM [=n] && ARCH_SOCFPGA [=n]
   <snip>
   Defined at board/sifive/fu540/Kconfig:15
     Depends on: RISCV [=n] && TARGET_SIFIVE_FU540 [=n]

which is a much more accurate representation.

Note that there is one notable difference between what gets printed for
prompts after this change and what got printed before bcdedcc1afd6: the
"Depends on" line now accurately represents the prompt's dependencies
instead of conflating those with the prompt's visibility (which can
include extra conditions). See the patch later in this series titled
"kconfig: distinguish between dependencies and visibility in help text"
for more details and better handling of that nuance.

Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/menu.c | 55 ++++++++++++++++++++++++++++----------------------
 1 file changed, 31 insertions(+), 24 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index 8b772ced755d..b4fb0c88b6e0 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -711,6 +711,21 @@ const char *menu_get_help(struct menu *menu)
 		return "";
 }
 
+static void get_def_str(struct gstr *r, struct menu *menu)
+{
+	str_printf(r, "Defined at %s:%d\n",
+		   menu->file->name, menu->lineno);
+}
+
+static void get_dep_str(struct gstr *r, struct expr *expr, const char *prefix)
+{
+	if (!expr_is_yes(expr)) {
+		str_append(r, prefix);
+		expr_gstr_print(expr, r);
+		str_append(r, "\n");
+	}
+}
+
 static void get_prompt_str(struct gstr *r, struct property *prop,
 			   struct list_head *head)
 {
@@ -718,7 +733,9 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
 	struct menu *submenu[8], *menu, *location = NULL;
 	struct jump_key *jump = NULL;
 
-	str_printf(r, "Prompt: %s\n", prop->text);
+	str_printf(r, "  Prompt: %s\n", prop->text);
+
+	get_dep_str(r, prop->menu->dep, "  Depends on: ");
 	menu = prop->menu->parent;
 	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 		bool accessible = menu_is_visible(menu);
@@ -768,18 +785,6 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
 	}
 }
 
-/*
- * get property of type P_SYMBOL
- */
-static struct property *get_symbol_prop(struct symbol *sym)
-{
-	struct property *prop = NULL;
-
-	for_all_properties(sym, prop, P_SYMBOL)
-		break;
-	return prop;
-}
-
 static void get_symbol_props_str(struct gstr *r, struct symbol *sym,
 				 enum prop_type tok, const char *prefix)
 {
@@ -819,17 +824,19 @@ static void get_symbol_str(struct gstr *r, struct symbol *sym,
 			}
 		}
 	}
-	for_all_prompts(sym, prop)
-		get_prompt_str(r, prop, head);
-
-	prop = get_symbol_prop(sym);
-	if (prop) {
-		str_printf(r, "  Defined at %s:%d\n", prop->menu->file->name,
-			prop->menu->lineno);
-		if (!expr_is_yes(prop->visible.expr)) {
-			str_append(r, "  Depends on: ");
-			expr_gstr_print(prop->visible.expr, r);
-			str_append(r, "\n");
+
+	/* Print the definitions with prompts before the ones without */
+	for_all_properties(sym, prop, P_SYMBOL) {
+		if (prop->menu->prompt) {
+			get_def_str(r, prop->menu);
+			get_prompt_str(r, prop->menu->prompt, head);
+		}
+	}
+
+	for_all_properties(sym, prop, P_SYMBOL) {
+		if (!prop->menu->prompt) {
+			get_def_str(r, prop->menu);
+			get_dep_str(r, prop->menu->dep, "  Depends on: ");
 		}
 	}
 
-- 
cgit v1.2.3


From 3460d0bc256a50b71dbdae8227c600761c502022 Mon Sep 17 00:00:00 2001
From: Thomas Hebb <tommyhebb@gmail.com>
Date: Tue, 17 Dec 2019 08:15:44 -0800
Subject: kconfig: distinguish between dependencies and visibility in help text

Kconfig makes a distinction between dependencies (defined by "depends
on" expressions and enclosing "if" blocks) and visibility (which
includes all dependencies, but also includes inline "if" expressions of
individual properties as well as, for prompts, "visible if" expressions
of enclosing menus).

Before commit bcdedcc1afd6 ("menuconfig: print more info for symbol
without prompts"), the "Depends on" lines of a symbol's help text
indicated the visibility of the prompt property they appeared under.
After bcdedcc1afd, there was always only a single "Depends on" line,
which indicated the visibility of the first P_SYMBOL property of the
symbol. Since P_SYMBOLs never have inline if expressions, this was in
effect the same as the dependencies of the menu item that the P_SYMBOL
was attached to.

Neither of these situations accurately conveyed the dependencies of a
symbol--the first because it was actually the visibility, and the second
because it only showed the dependencies from a single definition.

With this series, we are back to printing separate dependencies for each
definition, but we print the actual dependencies (rather than the
visibility) in the "Depends on" line. However, it can still be useful to
know the visibility of a prompt, so this patch adds a "Visible if" line
that shows the visibility only if the visibility is different from the
dependencies (which it isn't for most prompts in Linux).

Before:

  Symbol: THUMB2_KERNEL [=n]
  Type  : bool
  Defined at arch/arm/Kconfig:1417
    Prompt: Compile the kernel in Thumb-2 mode
    Depends on: (CPU_V7 [=y] || CPU_V7M [=n]) && !CPU_V6 [=n] && !CPU_V6K [=n]
    Location:
      -> Kernel Features
    Selects: ARM_UNWIND [=n]

After:

   Symbol: THUMB2_KERNEL [=n]
   Type  : bool
   Defined at arch/arm/Kconfig:1417
     Prompt: Compile the kernel in Thumb-2 mode
     Depends on: (CPU_V7 [=y] || CPU_V7M [=n]) && !CPU_V6 [=n] && !CPU_V6K [=n]
     Visible if: (CPU_V7 [=y] || CPU_V7M [=n]) && !CPU_V6 [=n] && !CPU_V6K [=n] && !CPU_THUMBONLY [=n]
     Location:
       -> Kernel Features
     Selects: ARM_UNWIND [=n]

Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/expr.c |  3 +--
 scripts/kconfig/expr.h |  1 +
 scripts/kconfig/menu.c | 11 +++++++++++
 3 files changed, 13 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/expr.c b/scripts/kconfig/expr.c
index 9f1de58e9f0c..81ebf8108ca7 100644
--- a/scripts/kconfig/expr.c
+++ b/scripts/kconfig/expr.c
@@ -13,7 +13,6 @@
 
 #define DEBUG_EXPR	0
 
-static int expr_eq(struct expr *e1, struct expr *e2);
 static struct expr *expr_eliminate_yn(struct expr *e);
 
 struct expr *expr_alloc_symbol(struct symbol *sym)
@@ -250,7 +249,7 @@ void expr_eliminate_eq(struct expr **ep1, struct expr **ep2)
  * equals some operand in the other (operands do not need to appear in the same
  * order), recursively.
  */
-static int expr_eq(struct expr *e1, struct expr *e2)
+int expr_eq(struct expr *e1, struct expr *e2)
 {
 	int res, old_count;
 
diff --git a/scripts/kconfig/expr.h b/scripts/kconfig/expr.h
index 6e102a3b8bd5..5c3443692f34 100644
--- a/scripts/kconfig/expr.h
+++ b/scripts/kconfig/expr.h
@@ -300,6 +300,7 @@ struct expr *expr_alloc_or(struct expr *e1, struct expr *e2);
 struct expr *expr_copy(const struct expr *org);
 void expr_free(struct expr *e);
 void expr_eliminate_eq(struct expr **ep1, struct expr **ep2);
+int expr_eq(struct expr *e1, struct expr *e2);
 tristate expr_calc_value(struct expr *e);
 struct expr *expr_trans_bool(struct expr *e);
 struct expr *expr_eliminate_dups(struct expr *e);
diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index b4fb0c88b6e0..da50f79a8e8d 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -736,6 +736,17 @@ static void get_prompt_str(struct gstr *r, struct property *prop,
 	str_printf(r, "  Prompt: %s\n", prop->text);
 
 	get_dep_str(r, prop->menu->dep, "  Depends on: ");
+	/*
+	 * Most prompts in Linux have visibility that exactly matches their
+	 * dependencies. For these, we print only the dependencies to improve
+	 * readability. However, prompts with inline "if" expressions and
+	 * prompts with a parent that has a "visible if" expression have
+	 * differing dependencies and visibility. In these rare cases, we
+	 * print both.
+	 */
+	if (!expr_eq(prop->menu->dep, prop->visible.expr))
+		get_dep_str(r, prop->visible.expr, "  Visible if: ");
+
 	menu = prop->menu->parent;
 	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent) {
 		bool accessible = menu_is_visible(menu);
-- 
cgit v1.2.3


From a9609686042b887baa636c77646b7614074c180a Mon Sep 17 00:00:00 2001
From: Thomas Hebb <tommyhebb@gmail.com>
Date: Tue, 17 Dec 2019 08:15:45 -0800
Subject: kconfig: fix nesting of symbol help text

When we generate the help text of a symbol (e.g. when a user presses '?'
in menuconfig), we do two things:

 1. We iterate through every prompt that belongs to that symbol,
    printing its text and its location in the menu tree.
 2. We print symbol-wide information that's not linked to a particular
    prompt, such as what it selects/is selected by and what it
    implies/is implied by.

Each prompt we print for 1 starts with a line that's not indented
indicating where the prompt is defined, then continues with indented
lines that describe properties of that particular definition.

Once we get to 2, however, we print all the global data indented as
well! Visually, this makes it look like the symbol-wide data is
associated with the last prompt we happened to print rather than
the symbol as a whole.

Fix this by removing the indentation for symbol-wide information.

Before:

  Symbol: CPU_FREQ [=n]
  Type  : bool
  Defined at drivers/cpufreq/Kconfig:4
    Prompt: CPU Frequency scaling
    Location:
      -> CPU Power Management
        -> CPU Frequency scaling
    Selects: SRCU [=n]
    Selected by [n]:
    - ARCH_SA1100 [=n] && <choice>

After:

  Symbol: CPU_FREQ [=n]
  Type  : bool
  Defined at drivers/cpufreq/Kconfig:4
    Prompt: CPU Frequency scaling
    Location:
      -> CPU Power Management
        -> CPU Frequency scaling
  Selects: SRCU [=n]
  Selected by [n]:
    - ARCH_SA1100 [=n] && <choice>

Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/menu.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
index da50f79a8e8d..e436ba44c9c5 100644
--- a/scripts/kconfig/menu.c
+++ b/scripts/kconfig/menu.c
@@ -851,18 +851,18 @@ static void get_symbol_str(struct gstr *r, struct symbol *sym,
 		}
 	}
 
-	get_symbol_props_str(r, sym, P_SELECT, "  Selects: ");
+	get_symbol_props_str(r, sym, P_SELECT, "Selects: ");
 	if (sym->rev_dep.expr) {
-		expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "  Selected by [y]:\n");
-		expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "  Selected by [m]:\n");
-		expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "  Selected by [n]:\n");
+		expr_gstr_print_revdep(sym->rev_dep.expr, r, yes, "Selected by [y]:\n");
+		expr_gstr_print_revdep(sym->rev_dep.expr, r, mod, "Selected by [m]:\n");
+		expr_gstr_print_revdep(sym->rev_dep.expr, r, no, "Selected by [n]:\n");
 	}
 
-	get_symbol_props_str(r, sym, P_IMPLY, "  Implies: ");
+	get_symbol_props_str(r, sym, P_IMPLY, "Implies: ");
 	if (sym->implied.expr) {
-		expr_gstr_print_revdep(sym->implied.expr, r, yes, "  Implied by [y]:\n");
-		expr_gstr_print_revdep(sym->implied.expr, r, mod, "  Implied by [m]:\n");
-		expr_gstr_print_revdep(sym->implied.expr, r, no, "  Implied by [n]:\n");
+		expr_gstr_print_revdep(sym->implied.expr, r, yes, "Implied by [y]:\n");
+		expr_gstr_print_revdep(sym->implied.expr, r, mod, "Implied by [m]:\n");
+		expr_gstr_print_revdep(sym->implied.expr, r, no, "Implied by [n]:\n");
 	}
 
 	str_append(r, "\n\n");
-- 
cgit v1.2.3


From ba82f52e2287f55ae10f4123980198b6ea8a8dc6 Mon Sep 17 00:00:00 2001
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date: Thu, 9 Jan 2020 17:16:36 +0100
Subject: kconfig: fix an "implicit declaration of function" warning
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

strncasecmp() & strcasecmp() functions are declared in strings.h, not
string.h. On most environments the former is implicitly included by
the latter but on some setups, building menuconfig results in the
following warning:

  HOSTCC  scripts/kconfig/mconf.o
scripts/kconfig/mconf.c: In function ‘search_conf’:
scripts/kconfig/mconf.c:423:6: warning: implicit declaration of function ‘strncasecmp’ [-Wimplicit-function-declaration]
  if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
      ^~~~~~~~~~~
scripts/kconfig/mconf.c: In function ‘main’:
scripts/kconfig/mconf.c:1021:8: warning: implicit declaration of function ‘strcasecmp’ [-Wimplicit-function-declaration]
   if (!strcasecmp(mode, "single_menu"))
        ^~~~~~~~~~

Fix it by explicitly including strings.h.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/gconf.c | 1 +
 scripts/kconfig/mconf.c | 1 +
 scripts/kconfig/nconf.c | 1 +
 3 files changed, 3 insertions(+)

(limited to 'scripts')

diff --git a/scripts/kconfig/gconf.c b/scripts/kconfig/gconf.c
index e36b342f1065..5527482c3077 100644
--- a/scripts/kconfig/gconf.c
+++ b/scripts/kconfig/gconf.c
@@ -18,6 +18,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <strings.h>
 #include <unistd.h>
 #include <time.h>
 
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index 49c26ea9dd98..4063dbc1b927 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -15,6 +15,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 #include <signal.h>
 #include <unistd.h>
 
diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index b7c1ef757178..daf1c1506ec4 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -8,6 +8,7 @@
 #define _GNU_SOURCE
 #endif
 #include <string.h>
+#include <strings.h>
 #include <stdlib.h>
 
 #include "lkc.h"
-- 
cgit v1.2.3


From 9945722afdc3443eab826b2da1122509a13a50a5 Mon Sep 17 00:00:00 2001
From: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Date: Sat, 4 Jan 2020 10:55:56 +0100
Subject: builddeb: make headers package thinner
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Remove a bunch of files not used during external module builds:
 - foreign architecture headers
 - subtree Makefiles
 - Kconfig files
 - perl scripts

On amd64 system this looses a third of the resulting .deb size.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index c4c580f547ef..b60388051c7f 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -165,8 +165,8 @@ EOF
 done
 
 # Build kernel header package
-(cd $srctree; find . -name Makefile\* -o -name Kconfig\* -o -name \*.pl) > "$objtree/debian/hdrsrcfiles"
-(cd $srctree; find arch/*/include include scripts -type f -o -type l) >> "$objtree/debian/hdrsrcfiles"
+(cd $srctree; find . arch/$SRCARCH -maxdepth 1 -name Makefile\*) > "$objtree/debian/hdrsrcfiles"
+(cd $srctree; find include scripts -type f -o -type l) >> "$objtree/debian/hdrsrcfiles"
 (cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$objtree/debian/hdrsrcfiles"
 (cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$objtree/debian/hdrsrcfiles"
 if is_enabled CONFIG_STACK_VALIDATION; then
-- 
cgit v1.2.3


From 5370d4acc590e5992ca4a1b9f606714fad69e88a Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 5 Jan 2020 00:36:51 +0900
Subject: modpost: assume STT_SPARC_REGISTER is defined

Commit 8d5290149ee1 ("[SPARC]: Deal with glibc changing macro names in
modpost.c") was more than 14 years ago. STT_SPARC_REGISTER is hopefully
defined in elf.h of recent C libraries.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
---
 scripts/mod/modpost.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

(limited to 'scripts')

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 6e892c93d104..7edfdb2f4497 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -12,6 +12,7 @@
  */
 
 #define _GNU_SOURCE
+#include <elf.h>
 #include <stdio.h>
 #include <ctype.h>
 #include <string.h>
@@ -729,12 +730,6 @@ static void handle_symbol(struct module *mod, struct elf_info *info,
 			break;
 		if (ignore_undef_symbol(info, symname))
 			break;
-/* cope with newer glibc (2.3.4 or higher) STT_ definition in elf.h */
-#if defined(STT_REGISTER) || defined(STT_SPARC_REGISTER)
-/* add compatibility with older glibc */
-#ifndef STT_SPARC_REGISTER
-#define STT_SPARC_REGISTER STT_REGISTER
-#endif
 		if (info->hdr->e_machine == EM_SPARC ||
 		    info->hdr->e_machine == EM_SPARCV9) {
 			/* Ignore register directives. */
@@ -747,7 +742,6 @@ static void handle_symbol(struct module *mod, struct elf_info *info,
 				symname = munged;
 			}
 		}
-#endif
 
 		mod->unres = alloc_symbol(symname,
 					  ELF_ST_BIND(sym->st_info) == STB_WEAK,
-- 
cgit v1.2.3


From 88fe89a47153facd8cb2d06d5c8727f7224c43c2 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Fri, 10 Jan 2020 14:02:24 +0900
Subject: kbuild: remove *.tmp file when filechk fails

Bartosz Golaszewski reports that when "make {menu,n,g,x}config" fails
due to missing packages, a temporary file is left over, which is not
ignored by git.

For example, if GTK+ is not installed:

  $ make gconfig
  *
  * Unable to find the GTK+ installation. Please make sure that
  * the GTK+ 2.0 development package is correctly installed.
  * You need gtk+-2.0 gmodule-2.0 libglade-2.0
  *
  scripts/kconfig/Makefile:208: recipe for target 'scripts/kconfig/gconf-cfg' failed
  make[1]: *** [scripts/kconfig/gconf-cfg] Error 1
  Makefile:567: recipe for target 'gconfig' failed
  make: *** [gconfig] Error 2
  $ git status
  HEAD detached at v5.4
  Untracked files:
    (use "git add <file>..." to include in what will be committed)

          scripts/kconfig/gconf-cfg.tmp

  nothing added to commit but untracked files present (use "git add" to track)

This is because the check scripts are run with filechk, which misses
to clean up the temporary file on failure.

When the line

  { $(filechk_$(1)); } > $@.tmp;

... fails, it exits immediately due to the 'set -e'. Use trap to make
sure to delete the temporary file on exit.

For extra safety, I replaced $@.tmp with $(dot-target).tmp to make it
a hidden file.

Reported-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Kbuild.include | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 3da8321efb74..6cabf20ce66a 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -59,14 +59,13 @@ kecho := $($(quiet)kecho)
 # - stdin is piped in from the first prerequisite ($<) so one has
 #   to specify a valid file as first prerequisite (often the kbuild file)
 define filechk
-	$(Q)set -e;				\
-	mkdir -p $(dir $@);			\
-	{ $(filechk_$(1)); } > $@.tmp;		\
-	if [ -r $@ ] && cmp -s $@ $@.tmp; then	\
-		rm -f $@.tmp;			\
-	else					\
-		$(kecho) '  UPD     $@';	\
-		mv -f $@.tmp $@;		\
+	$(Q)set -e;						\
+	mkdir -p $(dir $@);					\
+	trap "rm -f $(dot-target).tmp" EXIT;			\
+	{ $(filechk_$(1)); } > $(dot-target).tmp;		\
+	if [ ! -r $@ ] || ! cmp -s $@ $(dot-target).tmp; then	\
+		$(kecho) '  UPD     $@';			\
+		mv -f $(dot-target).tmp $@;			\
 	fi
 endef
 
-- 
cgit v1.2.3


From 9c9aa8fdf306cd7329e0a68bbcbe2f71b397dac1 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Mon, 13 Jan 2020 16:30:17 +0900
Subject: kbuild: remove 'Building modules, stage 2.' log

This log is displayed every time modules are built, but it is not
so important.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.modpost | 1 -
 1 file changed, 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 69897d5d3a70..b4d3f2d122ac 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -90,7 +90,6 @@ quiet_cmd_modpost = MODPOST $(words $(modules)) modules
       cmd_modpost = sed 's/ko$$/o/' $(MODORDER) | $(MODPOST)
 
 __modpost:
-	@$(kecho) '  Building modules, stage 2.'
 	$(call cmd,modpost)
 ifneq ($(KBUILD_MODPOST_NOFINAL),1)
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
-- 
cgit v1.2.3


From 1a7f0a34ea7d05d1ffcd32c9b1b4e07ac0687538 Mon Sep 17 00:00:00 2001
From: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Date: Tue, 14 Jan 2020 19:11:26 +0100
Subject: builddeb: allow selection of .deb compressor
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Select deb compression using KDEB_COMPRESS make variable. This allows to
use gzip compression for local or test builds, and that's way faster
than now-default xz compression.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index b60388051c7f..f903ba947daf 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -43,7 +43,7 @@ create_package() {
 
 	# Create the package
 	dpkg-gencontrol -p$pname -P"$pdir"
-	dpkg --build "$pdir" ..
+	dpkg-deb ${KDEB_COMPRESS:+-Z$KDEB_COMPRESS} --build "$pdir" ..
 }
 
 version=$KERNELRELEASE
-- 
cgit v1.2.3


From 3bed1b7b9d79ca40e41e3af130931a3225e951a3 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 18 Jan 2020 02:14:35 +0900
Subject: kbuild: use -S instead of -E for precise cc-option test in Kconfig
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Currently, -E (stop after the preprocessing stage) is used to check
whether the given compiler flag is supported.

While it is faster than -S (or -c), it can be false-positive. You need
to run the compilation proper to check the flag more precisely.

For example, -E and -S disagree about the support of
"--param asan-instrument-allocas=1".

$ gcc -Werror --param asan-instrument-allocas=1 -E -x c /dev/null -o /dev/null
$ echo $?
0

$ gcc -Werror --param asan-instrument-allocas=1 -S -x c /dev/null -o /dev/null
cc1: error: invalid --param name ‘asan-instrument-allocas’; did you mean ‘asan-instrument-writes’?
$ echo $?
1

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Kconfig.include | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index d4adfbe42690..bfb44b265a94 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -25,7 +25,7 @@ failure = $(if-success,$(1),n,y)
 
 # $(cc-option,<flag>)
 # Return y if the compiler supports <flag>, n otherwise
-cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -E -x c /dev/null -o /dev/null)
+cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -S -x c /dev/null -o /dev/null)
 
 # $(ld-option,<flag>)
 # Return y if the linker supports <flag>, n otherwise
-- 
cgit v1.2.3


From 1630146db2111412e7524d05d812ff8f2c75977e Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Mon, 27 Jan 2020 10:31:07 +0100
Subject: scripts/find-unused-docs: Fix massive false positives

scripts/find-unused-docs.sh invokes scripts/kernel-doc to find out if a
source file contains kerneldoc or not.

However, as it passes the no longer supported "-text" option to
scripts/kernel-doc, the latter prints out its help text, causing all
files to be considered containing kerneldoc.

Get rid of these false positives by removing the no longer supported
"-text" option from the scripts/kernel-doc invocation.

Cc: stable@vger.kernel.org  # 4.16+
Fixes: b05142675310d2ac ("scripts: kernel-doc: get rid of unused output formats")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200127093107.26401-1-geert+renesas@glider.be
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 scripts/find-unused-docs.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/find-unused-docs.sh b/scripts/find-unused-docs.sh
index 3f46f8977dc4..ee6a50e33aba 100755
--- a/scripts/find-unused-docs.sh
+++ b/scripts/find-unused-docs.sh
@@ -54,7 +54,7 @@ for file in `find $1 -name '*.c'`; do
 	if [[ ${FILES_INCLUDED[$file]+_} ]]; then
 	continue;
 	fi
-	str=$(scripts/kernel-doc -text -export "$file" 2>/dev/null)
+	str=$(scripts/kernel-doc -export "$file" 2>/dev/null)
 	if [[ -n "$str" ]]; then
 	echo "$file"
 	fi
-- 
cgit v1.2.3


From e9a3bfe38e393e1d8bd74986cdc9b99b8f9d1efc Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Tue, 28 Jan 2020 10:16:45 -0600
Subject: scripts/dtc: Revert "yamltree: Ensure consistent bracketing of
 properties with phandles"

This reverts upstream commit 18d7b2f4ee45fec422b7d82bab0b3c762ee907e4. A
revert in upstream dtc is pending.

This commit didn't work for properties such as 'interrupt-map' that have
phandle in the middle of an entry. It would also not work for a 0 or -1
phandle value that acts as a NULL.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 scripts/dtc/yamltree.c | 21 ---------------------
 1 file changed, 21 deletions(-)

(limited to 'scripts')

diff --git a/scripts/dtc/yamltree.c b/scripts/dtc/yamltree.c
index 43ca869dd6a8..5b6ea8ea862f 100644
--- a/scripts/dtc/yamltree.c
+++ b/scripts/dtc/yamltree.c
@@ -138,27 +138,6 @@ static void yaml_propval(yaml_emitter_t *emitter, struct property *prop)
 		(yaml_char_t *)YAML_SEQ_TAG, 1, YAML_FLOW_SEQUENCE_STYLE);
 	yaml_emitter_emit_or_die(emitter, &event);
 
-	/* Ensure we have a type marker before any phandle */
-	for_each_marker(m) {
-		int last_offset = 0;
-		struct marker *type_m;
-
-		if (m->type >= TYPE_UINT8)
-			last_offset = m->offset;
-
-		if (!(m->next && m->next->type == REF_PHANDLE &&
-		      last_offset < m->next->offset))
-			continue;
-
-		type_m = xmalloc(sizeof(*type_m));
-		type_m->offset = m->next->offset;
-		type_m->type = TYPE_UINT32;
-		type_m->ref = NULL;
-		type_m->next = m->next;
-		m->next = type_m;
-	}
-
-	m = prop->val.markers;
 	for_each_marker(m) {
 		int chunk_len;
 		char *data = &prop->val.val[m->offset];
-- 
cgit v1.2.3


From 7e61b167eb29f949f74a465aa135c69fac3d1c8f Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:29 +0900
Subject: builddeb: remove unneeded files in hdrobjfiles for headers package

- We do not need tools/objtool/fixdep or tools/objtool/sync-check.sh
   for building external modules. Including tools/objtool/objtool is
   enough.

 - gcc-common.h is a check-in file. I do not see any point to search
   for it in objtree.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index f903ba947daf..d4bb28fbd3de 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -170,11 +170,11 @@ done
 (cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$objtree/debian/hdrsrcfiles"
 (cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$objtree/debian/hdrsrcfiles"
 if is_enabled CONFIG_STACK_VALIDATION; then
-	(cd $objtree; find tools/objtool -type f -executable) >> "$objtree/debian/hdrobjfiles"
+	echo tools/objtool/objtool >> "$objtree/debian/hdrobjfiles"
 fi
 (cd $objtree; find arch/$SRCARCH/include Module.symvers include scripts -type f) >> "$objtree/debian/hdrobjfiles"
 if is_enabled CONFIG_GCC_PLUGINS; then
-	(cd $objtree; find scripts/gcc-plugins -name \*.so -o -name gcc-common.h) >> "$objtree/debian/hdrobjfiles"
+	(cd $objtree; find scripts/gcc-plugins -name \*.so) >> "$objtree/debian/hdrobjfiles"
 fi
 destdir=$kernel_headers_dir/usr/src/linux-headers-$version
 mkdir -p "$destdir"
-- 
cgit v1.2.3


From 1694e94e4f4698b7fdd37e6700ca6c5b7e01d25a Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:30 +0900
Subject: builddeb: match temporary directory name to the package name

The temporary directory names, debian/hdrtmp (linux-headers package)
vs debian/headertmp (linux-libc-dev package), are confusing.

Matching the directory name to the package name is clearer, IMHO.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index d4bb28fbd3de..d72267835373 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -47,10 +47,10 @@ create_package() {
 }
 
 version=$KERNELRELEASE
-tmpdir="$objtree/debian/tmp"
-kernel_headers_dir="$objtree/debian/hdrtmp"
-libc_headers_dir="$objtree/debian/headertmp"
-dbg_dir="$objtree/debian/dbgtmp"
+tmpdir="$objtree/debian/linux-image"
+kernel_headers_dir="$objtree/debian/linux-headers"
+libc_headers_dir="$objtree/debian/linux-libc-dev"
+dbg_dir="$objtree/debian/linux-image-dbg"
 packagename=linux-image-$version
 kernel_headers_packagename=linux-headers-$version
 libc_headers_packagename=linux-libc-dev
-- 
cgit v1.2.3


From f9a4711ebb248ad37c830b2715342ec60edb1330 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:31 +0900
Subject: builddeb: remove redundant $objtree/

This script works only when it is invoked in the $objtree, that is,
it is already relying on $objtree is '.'

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index d72267835373..15a76817e4ac 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -47,10 +47,10 @@ create_package() {
 }
 
 version=$KERNELRELEASE
-tmpdir="$objtree/debian/linux-image"
-kernel_headers_dir="$objtree/debian/linux-headers"
-libc_headers_dir="$objtree/debian/linux-libc-dev"
-dbg_dir="$objtree/debian/linux-image-dbg"
+tmpdir=debian/linux-image
+kernel_headers_dir=debian/linux-headers
+libc_headers_dir=debian/linux-libc-dev
+dbg_dir=debian/linux-image-dbg
 packagename=linux-image-$version
 kernel_headers_packagename=linux-headers-$version
 libc_headers_packagename=linux-libc-dev
@@ -77,7 +77,7 @@ esac
 BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
 
 # Setup the directory structure
-rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" $objtree/debian/files
+rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" debian/files
 mkdir -m 755 -p "$tmpdir/DEBIAN"
 mkdir -p "$tmpdir/lib" "$tmpdir/boot"
 mkdir -p "$kernel_headers_dir/lib/modules/$version/"
@@ -165,24 +165,24 @@ EOF
 done
 
 # Build kernel header package
-(cd $srctree; find . arch/$SRCARCH -maxdepth 1 -name Makefile\*) > "$objtree/debian/hdrsrcfiles"
-(cd $srctree; find include scripts -type f -o -type l) >> "$objtree/debian/hdrsrcfiles"
-(cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$objtree/debian/hdrsrcfiles"
-(cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$objtree/debian/hdrsrcfiles"
+(cd $srctree; find . arch/$SRCARCH -maxdepth 1 -name Makefile\*) > debian/hdrsrcfiles
+(cd $srctree; find include scripts -type f -o -type l) >> debian/hdrsrcfiles
+(cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> debian/hdrsrcfiles
+(cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> debian/hdrsrcfiles
 if is_enabled CONFIG_STACK_VALIDATION; then
-	echo tools/objtool/objtool >> "$objtree/debian/hdrobjfiles"
+	echo tools/objtool/objtool >> debian/hdrobjfiles
 fi
-(cd $objtree; find arch/$SRCARCH/include Module.symvers include scripts -type f) >> "$objtree/debian/hdrobjfiles"
+find arch/$SRCARCH/include Module.symvers include scripts -type f >> debian/hdrobjfiles
 if is_enabled CONFIG_GCC_PLUGINS; then
-	(cd $objtree; find scripts/gcc-plugins -name \*.so) >> "$objtree/debian/hdrobjfiles"
+	find scripts/gcc-plugins -name \*.so >> debian/hdrobjfiles
 fi
 destdir=$kernel_headers_dir/usr/src/linux-headers-$version
 mkdir -p "$destdir"
-(cd $srctree; tar -c -f - -T -) < "$objtree/debian/hdrsrcfiles" | (cd $destdir; tar -xf -)
-(cd $objtree; tar -c -f - -T -) < "$objtree/debian/hdrobjfiles" | (cd $destdir; tar -xf -)
-(cd $objtree; cp $KCONFIG_CONFIG $destdir/.config) # copy .config manually to be where it's expected to be
+(cd $srctree; tar -c -f - -T -) < debian/hdrsrcfiles | (cd $destdir; tar -xf -)
+tar -c -f - -T - < debian/hdrobjfiles | (cd $destdir; tar -xf -)
+cp $KCONFIG_CONFIG $destdir/.config # copy .config manually to be where it's expected to be
 ln -sf "/usr/src/linux-headers-$version" "$kernel_headers_dir/lib/modules/$version/build"
-rm -f "$objtree/debian/hdrsrcfiles" "$objtree/debian/hdrobjfiles"
+rm -f debian/hdrsrcfiles debian/hdrobjfiles
 
 if [ "$ARCH" != "um" ]; then
 	create_package "$kernel_headers_packagename" "$kernel_headers_dir"
-- 
cgit v1.2.3


From 9a92eee38790c63b45b32876cb1967154f8b9ee5 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:32 +0900
Subject: builddeb: avoid invoking sub-shells where possible

The commands surrounded by ( ... ) is run in a sub-shell, but you do
not have to spawn a sub-shell for every single line.

Use just one ( ... ) for creating debian/hdrsrcfiles.

For tar, use -C option instead.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 35 ++++++++++++++++++++++-------------
 1 file changed, 22 insertions(+), 13 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 15a76817e4ac..a73e0d5377e9 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -165,21 +165,30 @@ EOF
 done
 
 # Build kernel header package
-(cd $srctree; find . arch/$SRCARCH -maxdepth 1 -name Makefile\*) > debian/hdrsrcfiles
-(cd $srctree; find include scripts -type f -o -type l) >> debian/hdrsrcfiles
-(cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> debian/hdrsrcfiles
-(cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> debian/hdrsrcfiles
-if is_enabled CONFIG_STACK_VALIDATION; then
-	echo tools/objtool/objtool >> debian/hdrobjfiles
-fi
-find arch/$SRCARCH/include Module.symvers include scripts -type f >> debian/hdrobjfiles
-if is_enabled CONFIG_GCC_PLUGINS; then
-	find scripts/gcc-plugins -name \*.so >> debian/hdrobjfiles
-fi
+(
+	cd $srctree
+	find . arch/$SRCARCH -maxdepth 1 -name Makefile\*
+	find include scripts -type f -o -type l
+	find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform
+	find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f
+) > debian/hdrsrcfiles
+
+{
+	if is_enabled CONFIG_STACK_VALIDATION; then
+		echo tools/objtool/objtool
+	fi
+
+	find arch/$SRCARCH/include Module.symvers include scripts -type f
+
+	if is_enabled CONFIG_GCC_PLUGINS; then
+		find scripts/gcc-plugins -name \*.so
+	fi
+} > debian/hdrobjfiles
+
 destdir=$kernel_headers_dir/usr/src/linux-headers-$version
 mkdir -p "$destdir"
-(cd $srctree; tar -c -f - -T -) < debian/hdrsrcfiles | (cd $destdir; tar -xf -)
-tar -c -f - -T - < debian/hdrobjfiles | (cd $destdir; tar -xf -)
+tar -c -f - -C $srctree -T debian/hdrsrcfiles | tar -xf - -C $destdir
+tar -c -f - -T debian/hdrobjfiles | tar -xf - -C $destdir
 cp $KCONFIG_CONFIG $destdir/.config # copy .config manually to be where it's expected to be
 ln -sf "/usr/src/linux-headers-$version" "$kernel_headers_dir/lib/modules/$version/build"
 rm -f debian/hdrsrcfiles debian/hdrobjfiles
-- 
cgit v1.2.3


From aae6a6712440d566ae148fc3af223dc25fbd9794 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:33 +0900
Subject: builddeb: remove redundant make for ARCH=um

The kernel build has already been done before builddeb is invoked.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index a73e0d5377e9..731b5d0b2422 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -82,10 +82,9 @@ mkdir -m 755 -p "$tmpdir/DEBIAN"
 mkdir -p "$tmpdir/lib" "$tmpdir/boot"
 mkdir -p "$kernel_headers_dir/lib/modules/$version/"
 
-# Build and install the kernel
+# Install the kernel
 if [ "$ARCH" = "um" ] ; then
 	mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin" "$tmpdir/usr/share/doc/$packagename"
-	$MAKE linux
 	cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map"
 	cp $KCONFIG_CONFIG "$tmpdir/usr/share/doc/$packagename/config"
 	gzip "$tmpdir/usr/share/doc/$packagename/config"
-- 
cgit v1.2.3


From 3126c17d28b696ba555bb959888fe4b5143bb389 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:34 +0900
Subject: builddeb: split kernel headers deployment out into a function

Deploy kernel headers (linux-headers package) in a separate function
for readability.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 76 ++++++++++++++++++++++++++----------------------
 1 file changed, 42 insertions(+), 34 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 731b5d0b2422..c9287e57d398 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -46,13 +46,49 @@ create_package() {
 	dpkg-deb ${KDEB_COMPRESS:+-Z$KDEB_COMPRESS} --build "$pdir" ..
 }
 
+deploy_kernel_headers () {
+	pdir=$1
+
+	rm -rf $pdir
+
+	(
+		cd $srctree
+		find . arch/$SRCARCH -maxdepth 1 -name Makefile\*
+		find include scripts -type f -o -type l
+		find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform
+		find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f
+	) > debian/hdrsrcfiles
+
+	{
+		if is_enabled CONFIG_STACK_VALIDATION; then
+			echo tools/objtool/objtool
+		fi
+
+		find arch/$SRCARCH/include Module.symvers include scripts -type f
+
+		if is_enabled CONFIG_GCC_PLUGINS; then
+			find scripts/gcc-plugins -name \*.so
+		fi
+	} > debian/hdrobjfiles
+
+	destdir=$pdir/usr/src/linux-headers-$version
+	mkdir -p $destdir
+	tar -c -f - -C $srctree -T debian/hdrsrcfiles | tar -xf - -C $destdir
+	tar -c -f - -T debian/hdrobjfiles | tar -xf - -C $destdir
+	rm -f debian/hdrsrcfiles debian/hdrobjfiles
+
+	# copy .config manually to be where it's expected to be
+	cp $KCONFIG_CONFIG $destdir/.config
+
+	mkdir -p $pdir/lib/modules/$version/
+	ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build
+}
+
 version=$KERNELRELEASE
 tmpdir=debian/linux-image
-kernel_headers_dir=debian/linux-headers
 libc_headers_dir=debian/linux-libc-dev
 dbg_dir=debian/linux-image-dbg
 packagename=linux-image-$version
-kernel_headers_packagename=linux-headers-$version
 libc_headers_packagename=linux-libc-dev
 dbg_packagename=$packagename-dbg
 
@@ -77,10 +113,9 @@ esac
 BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
 
 # Setup the directory structure
-rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" debian/files
+rm -rf "$tmpdir" "$libc_headers_dir" "$dbg_dir" debian/files
 mkdir -m 755 -p "$tmpdir/DEBIAN"
 mkdir -p "$tmpdir/lib" "$tmpdir/boot"
-mkdir -p "$kernel_headers_dir/lib/modules/$version/"
 
 # Install the kernel
 if [ "$ARCH" = "um" ] ; then
@@ -163,37 +198,10 @@ EOF
 	chmod 755 "$tmpdir/DEBIAN/$script"
 done
 
-# Build kernel header package
-(
-	cd $srctree
-	find . arch/$SRCARCH -maxdepth 1 -name Makefile\*
-	find include scripts -type f -o -type l
-	find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform
-	find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f
-) > debian/hdrsrcfiles
-
-{
-	if is_enabled CONFIG_STACK_VALIDATION; then
-		echo tools/objtool/objtool
-	fi
-
-	find arch/$SRCARCH/include Module.symvers include scripts -type f
-
-	if is_enabled CONFIG_GCC_PLUGINS; then
-		find scripts/gcc-plugins -name \*.so
-	fi
-} > debian/hdrobjfiles
-
-destdir=$kernel_headers_dir/usr/src/linux-headers-$version
-mkdir -p "$destdir"
-tar -c -f - -C $srctree -T debian/hdrsrcfiles | tar -xf - -C $destdir
-tar -c -f - -T debian/hdrobjfiles | tar -xf - -C $destdir
-cp $KCONFIG_CONFIG $destdir/.config # copy .config manually to be where it's expected to be
-ln -sf "/usr/src/linux-headers-$version" "$kernel_headers_dir/lib/modules/$version/build"
-rm -f debian/hdrsrcfiles debian/hdrobjfiles
-
 if [ "$ARCH" != "um" ]; then
-	create_package "$kernel_headers_packagename" "$kernel_headers_dir"
+	deploy_kernel_headers debian/linux-headers
+	create_package linux-headers-$version debian/linux-headers
+
 	create_package "$libc_headers_packagename" "$libc_headers_dir"
 fi
 
-- 
cgit v1.2.3


From 451dff37f0752cc8ad6f1bb82081a98d7b760310 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 25 Jan 2020 13:12:35 +0900
Subject: builddeb: split libc headers deployment out into a function

Deploy user-space headers (linux-libc-dev package) in a separate
function for readability.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/builddeb | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

(limited to 'scripts')

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index c9287e57d398..6df3c9f8b2da 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -84,12 +84,25 @@ deploy_kernel_headers () {
 	ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build
 }
 
+deploy_libc_headers () {
+	pdir=$1
+
+	rm -rf $pdir
+
+	$MAKE -f $srctree/Makefile headers
+	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH=$pdir/usr
+
+	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
+	# used by Debian-based distros (to support multi-arch)
+	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
+	mkdir $pdir/usr/include/$host_arch
+	mv $pdir/usr/include/asm $pdir/usr/include/$host_arch/
+}
+
 version=$KERNELRELEASE
 tmpdir=debian/linux-image
-libc_headers_dir=debian/linux-libc-dev
 dbg_dir=debian/linux-image-dbg
 packagename=linux-image-$version
-libc_headers_packagename=linux-libc-dev
 dbg_packagename=$packagename-dbg
 
 if [ "$ARCH" = "um" ] ; then
@@ -113,7 +126,7 @@ esac
 BUILD_DEBUG=$(if_enabled_echo CONFIG_DEBUG_INFO Yes)
 
 # Setup the directory structure
-rm -rf "$tmpdir" "$libc_headers_dir" "$dbg_dir" debian/files
+rm -rf "$tmpdir" "$dbg_dir" debian/files
 mkdir -m 755 -p "$tmpdir/DEBIAN"
 mkdir -p "$tmpdir/lib" "$tmpdir/boot"
 
@@ -163,16 +176,6 @@ if is_enabled CONFIG_MODULES; then
 	fi
 fi
 
-if [ "$ARCH" != "um" ]; then
-	$MAKE -f $srctree/Makefile headers
-	$MAKE -f $srctree/Makefile headers_install INSTALL_HDR_PATH="$libc_headers_dir/usr"
-	# move asm headers to /usr/include/<libc-machine>/asm to match the structure
-	# used by Debian-based distros (to support multi-arch)
-	host_arch=$(dpkg-architecture -a$(cat debian/arch) -qDEB_HOST_MULTIARCH)
-	mkdir $libc_headers_dir/usr/include/$host_arch
-	mv $libc_headers_dir/usr/include/asm $libc_headers_dir/usr/include/$host_arch/
-fi
-
 # Install the maintainer scripts
 # Note: hook scripts under /etc/kernel are also executed by official Debian
 # kernel packages, as well as kernel packages built using make-kpkg.
@@ -202,7 +205,8 @@ if [ "$ARCH" != "um" ]; then
 	deploy_kernel_headers debian/linux-headers
 	create_package linux-headers-$version debian/linux-headers
 
-	create_package "$libc_headers_packagename" "$libc_headers_dir"
+	deploy_libc_headers debian/linux-libc-dev
+	create_package linux-libc-dev debian/linux-libc-dev
 fi
 
 create_package "$packagename" "$tmpdir"
-- 
cgit v1.2.3


From 2ab1278fe401af3cbb52c4492068b3cae2375959 Mon Sep 17 00:00:00 2001
From: Xiong <xndchn@gmail.com>
Date: Thu, 30 Jan 2020 22:11:27 -0800
Subject: scripts/spelling.txt: add more spellings to spelling.txt

Here are some of the common spelling mistakes and typos that I've found
while fixing up spelling mistakes in the kernel.  Most of them still
exist in more than two source files.

Link: http://lkml.kernel.org/r/20191229143626.51238-1-xndchn@gmail.com
Signed-off-by: Xiong <xndchn@gmail.com>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Chris Paterson <chris.paterson2@renesas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/spelling.txt | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'scripts')

diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index 672b5931bc8d..e95aea25f975 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -39,6 +39,8 @@ accout||account
 accquire||acquire
 accquired||acquired
 accross||across
+accumalate||accumulate
+accumalator||accumulator
 acessable||accessible
 acess||access
 acessing||accessing
@@ -106,6 +108,7 @@ alogrithm||algorithm
 alot||a lot
 alow||allow
 alows||allows
+alreay||already
 alredy||already
 altough||although
 alue||value
@@ -241,6 +244,7 @@ calender||calendar
 calescing||coalescing
 calle||called
 callibration||calibration
+callled||called
 calucate||calculate
 calulate||calculate
 cancelation||cancellation
@@ -311,6 +315,7 @@ compaibility||compatibility
 comparsion||comparison
 compatability||compatibility
 compatable||compatible
+compatibililty||compatibility
 compatibiliy||compatibility
 compatibilty||compatibility
 compatiblity||compatibility
@@ -330,6 +335,7 @@ comunication||communication
 conbination||combination
 conditionaly||conditionally
 conditon||condition
+condtion||condition
 conected||connected
 conector||connector
 connecetd||connected
@@ -388,6 +394,8 @@ dafault||default
 deafult||default
 deamon||daemon
 debouce||debounce
+decendant||descendant
+decendants||descendants
 decompres||decompress
 decsribed||described
 decription||description
@@ -411,11 +419,13 @@ delare||declare
 delares||declares
 delaring||declaring
 delemiter||delimiter
+delievered||delivered
 demodualtor||demodulator
 demension||dimension
 dependancies||dependencies
 dependancy||dependency
 dependant||dependent
+dependend||dependent
 depreacted||deprecated
 depreacte||deprecate
 desactivate||deactivate
@@ -995,6 +1005,7 @@ peice||piece
 pendantic||pedantic
 peprocessor||preprocessor
 perfoming||performing
+perfomring||performing
 peripherial||peripheral
 permissons||permissions
 peroid||period
@@ -1166,6 +1177,8 @@ retreive||retrieve
 retreiving||retrieving
 retrive||retrieve
 retrived||retrieved
+retrun||return
+retun||return
 retuned||returned
 reudce||reduce
 reuest||request
-- 
cgit v1.2.3


From 4efc61c798cd7725a47ec1e9c2a2f755891dcaa3 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli <luca@lucaceresoli.net>
Date: Thu, 30 Jan 2020 22:11:30 -0800
Subject: scripts/spelling.txt: add "issus" typo

Add "issus" and correct it as "issues".

Link: http://lkml.kernel.org/r/20200105221950.8384-1-luca@lucaceresoli.net
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/spelling.txt | 1 +
 1 file changed, 1 insertion(+)

(limited to 'scripts')

diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index e95aea25f975..ffa838f3a2b5 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -801,6 +801,7 @@ ireelevant||irrelevant
 irrelevent||irrelevant
 isnt||isn't
 isssue||issue
+issus||issues
 iternations||iterations
 itertation||iteration
 itslef||itself
-- 
cgit v1.2.3


From c8fb7d7e48d11520ad24808cfce7afb7b9c9f798 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 1 Feb 2020 14:03:11 +0900
Subject: kconfig: fix broken dependency in randconfig-generated .config

Running randconfig on arm64 using KCONFIG_SEED=0x40C5E904 (e.g. on v5.5)
produces the .config with CONFIG_EFI=y and CONFIG_CPU_BIG_ENDIAN=y,
which does not meet the !CONFIG_CPU_BIG_ENDIAN dependency.

This is because the user choice for CONFIG_CPU_LITTLE_ENDIAN vs
CONFIG_CPU_BIG_ENDIAN is set by randomize_choice_values() after the
value of CONFIG_EFI is calculated.

When this happens, the has_changed flag should be set.

Currently, it takes the result from the last iteration. It should
accumulate all the results of the loop.

Fixes: 3b9a19e08960 ("kconfig: loop as long as we changed some symbols in randconfig")
Reported-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/confdata.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 11f6c72c2eee..63d307b0d1ac 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -1312,7 +1312,7 @@ bool conf_set_all_new_symbols(enum conf_def_mode mode)
 
 		sym_calc_value(csym);
 		if (mode == def_random)
-			has_changed = randomize_choice_values(csym);
+			has_changed |= randomize_choice_values(csym);
 		else {
 			set_all_choice_values(csym);
 			has_changed = true;
-- 
cgit v1.2.3


From 5f2fb52fac15a8a8e10ce020dd532504a8abfc4e Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 2 Feb 2020 01:49:24 +0900
Subject: kbuild: rename hostprogs-y/always to hostprogs/always-y

In old days, the "host-progs" syntax was used for specifying host
programs. It was renamed to the current "hostprogs-y" in 2004.

It is typically useful in scripts/Makefile because it allows Kbuild to
selectively compile host programs based on the kernel configuration.

This commit renames like follows:

  always       ->  always-y
  hostprogs-y  ->  hostprogs

So, scripts/Makefile will look like this:

  always-$(CONFIG_BUILD_BIN2C) += ...
  always-$(CONFIG_KALLSYMS)    += ...
      ...
  hostprogs := $(always-y) $(always-m)

I think this makes more sense because a host program is always a host
program, irrespective of the kernel configuration. We want to specify
which ones to compile by CONFIG options, so always-y will be handier.

The "always", "hostprogs-y", "hostprogs-m" will be kept for backward
compatibility for a while.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Documentation/kbuild/makefiles.rst  |  49 +++++----------
 Kbuild                              |   8 +--
 arch/alpha/boot/Makefile            |   2 +-
 arch/arm/vdso/Makefile              |   2 +-
 arch/arm64/kernel/vdso32/Makefile   |   4 +-
 arch/mips/boot/Makefile             |   2 +-
 arch/mips/boot/compressed/Makefile  |   4 +-
 arch/mips/boot/tools/Makefile       |   2 +-
 arch/mips/tools/Makefile            |   4 +-
 arch/mips/vdso/Makefile             |   2 +-
 arch/powerpc/boot/Makefile          |   4 +-
 arch/s390/tools/Makefile            |   4 +-
 arch/sparc/boot/Makefile            |   2 +-
 arch/sparc/vdso/Makefile            |   2 +-
 arch/x86/boot/Makefile              |   4 +-
 arch/x86/boot/compressed/Makefile   |   2 +-
 arch/x86/entry/vdso/Makefile        |   2 +-
 arch/x86/realmode/rm/Makefile       |   2 +-
 arch/x86/tools/Makefile             |   4 +-
 drivers/gpu/drm/radeon/Makefile     |   2 +-
 drivers/tty/vt/Makefile             |   2 +-
 drivers/video/logo/Makefile         |   2 +-
 drivers/zorro/Makefile              |   2 +-
 fs/unicode/Makefile                 |   2 +-
 lib/Makefile                        |   4 +-
 lib/raid6/Makefile                  |   2 +-
 net/bpfilter/Makefile               |   2 +-
 samples/bpf/Makefile                | 118 ++++++++++++++++++------------------
 samples/connector/Makefile          |   8 +--
 samples/hidraw/Makefile             |   6 +-
 samples/mei/Makefile                |   4 +-
 samples/pidfd/Makefile              |   4 +-
 samples/seccomp/Makefile            |   4 +-
 samples/uhid/Makefile               |   4 +-
 samples/vfs/Makefile                |   5 +-
 scripts/Makefile                    |  22 +++----
 scripts/Makefile.build              |   8 ++-
 scripts/Makefile.clean              |   4 +-
 scripts/Makefile.host               |   8 +--
 scripts/Makefile.lib                |   6 +-
 scripts/basic/Makefile              |   4 +-
 scripts/dtc/Makefile                |   4 +-
 scripts/gcc-plugins/Makefile        |   2 +-
 scripts/genksyms/Makefile           |   4 +-
 scripts/kconfig/Makefile            |  10 +--
 scripts/mod/Makefile                |   4 +-
 scripts/selinux/genheaders/Makefile |   4 +-
 scripts/selinux/mdp/Makefile        |   4 +-
 usr/Makefile                        |   2 +-
 49 files changed, 172 insertions(+), 190 deletions(-)

(limited to 'scripts')

diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst
index b1733b877025..0e0eb2c8da7d 100644
--- a/Documentation/kbuild/makefiles.rst
+++ b/Documentation/kbuild/makefiles.rst
@@ -28,7 +28,6 @@ This document describes the Linux kernel Makefiles.
 	   --- 4.3 Using C++ for host programs
 	   --- 4.4 Controlling compiler options for host programs
 	   --- 4.5 When host programs are actually built
-	   --- 4.6 Using hostprogs-$(CONFIG_FOO)
 
 	=== 5 Kbuild clean infrastructure
 
@@ -595,11 +594,11 @@ compilation stage.
 Two steps are required in order to use a host executable.
 
 The first step is to tell kbuild that a host program exists. This is
-done utilising the variable hostprogs-y.
+done utilising the variable "hostprogs".
 
 The second step is to add an explicit dependency to the executable.
 This can be done in two ways. Either add the dependency in a rule,
-or utilise the variable $(always).
+or utilise the variable "always-y".
 Both possibilities are described in the following.
 
 4.1 Simple Host Program
@@ -612,7 +611,7 @@ Both possibilities are described in the following.
 
 	Example::
 
-		hostprogs-y := bin2hex
+		hostprogs := bin2hex
 
 	Kbuild assumes in the above example that bin2hex is made from a single
 	c-source file named bin2hex.c located in the same directory as
@@ -630,7 +629,7 @@ Both possibilities are described in the following.
 	Example::
 
 		#scripts/lxdialog/Makefile
-		hostprogs-y   := lxdialog
+		hostprogs     := lxdialog
 		lxdialog-objs := checklist.o lxdialog.o
 
 	Objects with extension .o are compiled from the corresponding .c
@@ -650,7 +649,7 @@ Both possibilities are described in the following.
 	Example::
 
 		#scripts/kconfig/Makefile
-		hostprogs-y   := qconf
+		hostprogs     := qconf
 		qconf-cxxobjs := qconf.o
 
 	In the example above the executable is composed of the C++ file
@@ -662,7 +661,7 @@ Both possibilities are described in the following.
 	Example::
 
 		#scripts/kconfig/Makefile
-		hostprogs-y   := qconf
+		hostprogs     := qconf
 		qconf-cxxobjs := qconf.o
 		qconf-objs    := check.o
 
@@ -710,7 +709,7 @@ Both possibilities are described in the following.
 	Example::
 
 		#drivers/pci/Makefile
-		hostprogs-y := gen-devlist
+		hostprogs := gen-devlist
 		$(obj)/devlist.h: $(src)/pci.ids $(obj)/gen-devlist
 			( cd $(obj); ./gen-devlist ) < $<
 
@@ -718,47 +717,31 @@ Both possibilities are described in the following.
 	$(obj)/gen-devlist is updated. Note that references to
 	the host programs in special rules must be prefixed with $(obj).
 
-	(2) Use $(always)
+	(2) Use always-y
 
 	When there is no suitable special rule, and the host program
-	shall be built when a makefile is entered, the $(always)
+	shall be built when a makefile is entered, the always-y
 	variable shall be used.
 
 	Example::
 
 		#scripts/lxdialog/Makefile
-		hostprogs-y   := lxdialog
-		always        := $(hostprogs-y)
+		hostprogs     := lxdialog
+		always-y      := $(hostprogs)
 
 	This will tell kbuild to build lxdialog even if not referenced in
 	any rule.
 
-4.6 Using hostprogs-$(CONFIG_FOO)
----------------------------------
-
-	A typical pattern in a Kbuild file looks like this:
-
-	Example::
-
-		#scripts/Makefile
-		hostprogs-$(CONFIG_KALLSYMS) += kallsyms
-
-	Kbuild knows about both 'y' for built-in and 'm' for module.
-	So if a config symbol evaluates to 'm', kbuild will still build
-	the binary. In other words, Kbuild handles hostprogs-m exactly
-	like hostprogs-y. But only hostprogs-y is recommended to be used
-	when no CONFIG symbols are involved.
-
 5 Kbuild clean infrastructure
 =============================
 
 "make clean" deletes most generated files in the obj tree where the kernel
 is compiled. This includes generated files such as host programs.
-Kbuild knows targets listed in $(hostprogs-y), $(hostprogs-m), $(always),
-$(extra-y) and $(targets). They are all deleted during "make clean".
-Files matching the patterns "*.[oas]", "*.ko", plus some additional files
-generated by kbuild are deleted all over the kernel src tree when
-"make clean" is executed.
+Kbuild knows targets listed in $(hostprogs), $(always-y), $(always-m),
+$(always-), $(extra-y), $(extra-) and $(targets). They are all deleted
+during "make clean". Files matching the patterns "*.[oas]", "*.ko", plus
+some additional files generated by kbuild are deleted all over the kernel
+source tree when "make clean" is executed.
 
 Additional files or directories can be specified in kbuild makefiles by use of
 $(clean-files).
diff --git a/Kbuild b/Kbuild
index 3109ac786e76..fa441b98c9f6 100644
--- a/Kbuild
+++ b/Kbuild
@@ -7,7 +7,7 @@
 
 bounds-file := include/generated/bounds.h
 
-always  := $(bounds-file)
+always-y := $(bounds-file)
 targets := kernel/bounds.s
 
 $(bounds-file): kernel/bounds.s FORCE
@@ -28,7 +28,7 @@ $(timeconst-file): kernel/time/timeconst.bc FORCE
 
 offsets-file := include/generated/asm-offsets.h
 
-always  += $(offsets-file)
+always-y += $(offsets-file)
 targets += arch/$(SRCARCH)/kernel/asm-offsets.s
 
 arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
@@ -39,7 +39,7 @@ $(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
 #####
 # Check for missing system calls
 
-always += missing-syscalls
+always-y += missing-syscalls
 
 quiet_cmd_syscalls = CALL    $<
       cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
@@ -50,7 +50,7 @@ missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
 #####
 # Check atomic headers are up-to-date
 
-always += old-atomics
+always-y += old-atomics
 
 quiet_cmd_atomics = CALL    $<
       cmd_atomics = $(CONFIG_SHELL) $<
diff --git a/arch/alpha/boot/Makefile b/arch/alpha/boot/Makefile
index 991e023a6fc4..d8dba85e606c 100644
--- a/arch/alpha/boot/Makefile
+++ b/arch/alpha/boot/Makefile
@@ -8,7 +8,7 @@
 # Copyright (C) 1994 by Linus Torvalds
 #
 
-hostprogs-y	:= tools/mkbb tools/objstrip
+hostprogs	:= tools/mkbb tools/objstrip
 targets		:= vmlinux.gz vmlinux \
 		   vmlinux.nh tools/lxboot tools/bootlx tools/bootph \
 		   tools/bootpzh bootloader bootpheader bootpzheader 
diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
index 1babb392e70a..d3c9f03e7e79 100644
--- a/arch/arm/vdso/Makefile
+++ b/arch/arm/vdso/Makefile
@@ -5,7 +5,7 @@
 ARCH_REL_TYPE_ABS := R_ARM_JUMP_SLOT|R_ARM_GLOB_DAT|R_ARM_ABS32
 include $(srctree)/lib/vdso/Makefile
 
-hostprogs-y := vdsomunge
+hostprogs := vdsomunge
 
 obj-vdso := vgettimeofday.o datapage.o note.o
 
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 76b327f88fbb..04df57b43cb1 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -115,9 +115,9 @@ VDSO_LDFLAGS += $(call cc32-ldoption,-fuse-ld=bfd)
 
 # Borrow vdsomunge.c from the arm vDSO
 # We have to use a relative path because scripts/Makefile.host prefixes
-# $(hostprogs-y) with $(obj)
+# $(hostprogs) with $(obj)
 munge := ../../../arm/vdso/vdsomunge
-hostprogs-y := $(munge)
+hostprogs := $(munge)
 
 c-obj-vdso := note.o
 c-obj-vdso-gettimeofday := vgettimeofday.o
diff --git a/arch/mips/boot/Makefile b/arch/mips/boot/Makefile
index 4ed45ade32a1..a3da2c5d63c2 100644
--- a/arch/mips/boot/Makefile
+++ b/arch/mips/boot/Makefile
@@ -21,7 +21,7 @@ endif
 drop-sections := .reginfo .mdebug .comment .note .pdr .options .MIPS.options
 strip-flags   := $(addprefix --remove-section=,$(drop-sections))
 
-hostprogs-y := elf2ecoff
+hostprogs := elf2ecoff
 
 suffix-y			:= bin
 suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
index d859f079b771..0df0ee8a298d 100644
--- a/arch/mips/boot/compressed/Makefile
+++ b/arch/mips/boot/compressed/Makefile
@@ -84,7 +84,7 @@ $(obj)/piggy.o: $(obj)/dummy.o $(obj)/vmlinux.bin.z FORCE
 HOSTCFLAGS_calc_vmlinuz_load_addr.o += $(LINUXINCLUDE)
 
 # Calculate the load address of the compressed kernel image
-hostprogs-y := calc_vmlinuz_load_addr
+hostprogs := calc_vmlinuz_load_addr
 
 ifneq ($(zload-y),)
 VMLINUZ_LOAD_ADDRESS := $(zload-y)
@@ -112,7 +112,7 @@ ifdef CONFIG_MACH_DECSTATION
 endif
 
 # elf2ecoff can only handle 32bit image
-hostprogs-y += ../elf2ecoff
+hostprogs += ../elf2ecoff
 
 ifdef CONFIG_32BIT
 	VMLINUZ = vmlinuz
diff --git a/arch/mips/boot/tools/Makefile b/arch/mips/boot/tools/Makefile
index 5f8e737348eb..592e05a51a4a 100644
--- a/arch/mips/boot/tools/Makefile
+++ b/arch/mips/boot/tools/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-hostprogs-y	+= relocs
+hostprogs	+= relocs
 relocs-objs	+= relocs_32.o
 relocs-objs	+= relocs_64.o
 relocs-objs	+= relocs_main.o
diff --git a/arch/mips/tools/Makefile b/arch/mips/tools/Makefile
index aaef688749f5..b851e5dcc65a 100644
--- a/arch/mips/tools/Makefile
+++ b/arch/mips/tools/Makefile
@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
-hostprogs-y := elf-entry
+hostprogs := elf-entry
 PHONY += elf-entry
 elf-entry: $(obj)/elf-entry
 	@:
 
-hostprogs-$(CONFIG_CPU_LOONGSON3_WORKAROUNDS) += loongson3-llsc-check
+hostprogs += loongson3-llsc-check
 PHONY += loongson3-llsc-check
 loongson3-llsc-check: $(obj)/loongson3-llsc-check
 	@:
diff --git a/arch/mips/vdso/Makefile b/arch/mips/vdso/Makefile
index b2a2e032dc99..aa89a41dc5dd 100644
--- a/arch/mips/vdso/Makefile
+++ b/arch/mips/vdso/Makefile
@@ -100,7 +100,7 @@ $(obj)/%.so.raw: OBJCOPYFLAGS := -S
 $(obj)/%.so.raw: $(obj)/%.so.dbg.raw FORCE
 	$(call if_changed,objcopy)
 
-hostprogs-y := genvdso
+hostprogs := genvdso
 
 quiet_cmd_genvdso = GENVDSO $@
 define cmd_genvdso
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index dfbd7f22eef5..0556bf4fc9e9 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -224,7 +224,7 @@ $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S FORCE
 $(obj)/wrapper.a: $(obj-wlib) FORCE
 	$(call if_changed,bootar)
 
-hostprogs-y	:= addnote hack-coff mktree
+hostprogs	:= addnote hack-coff mktree
 
 targets		+= $(patsubst $(obj)/%,%,$(obj-boot) wrapper.a)
 extra-y		:= $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
@@ -464,7 +464,7 @@ WRAPPER_BINDIR := /usr/sbin
 INSTALL := install
 
 extra-installed		:= $(patsubst $(obj)/%, $(DESTDIR)$(WRAPPER_OBJDIR)/%, $(extra-y))
-hostprogs-installed	:= $(patsubst %, $(DESTDIR)$(WRAPPER_BINDIR)/%, $(hostprogs-y))
+hostprogs-installed	:= $(patsubst %, $(DESTDIR)$(WRAPPER_BINDIR)/%, $(hostprogs))
 wrapper-installed	:= $(DESTDIR)$(WRAPPER_BINDIR)/wrapper
 dts-installed		:= $(patsubst $(dtstree)/%, $(DESTDIR)$(WRAPPER_DTSDIR)/%, $(wildcard $(dtstree)/*.dts))
 
diff --git a/arch/s390/tools/Makefile b/arch/s390/tools/Makefile
index b5e35e8f999a..f9dd47ff9ac4 100644
--- a/arch/s390/tools/Makefile
+++ b/arch/s390/tools/Makefile
@@ -10,8 +10,8 @@ PHONY += kapi
 
 kapi:	$(kapi-hdrs-y)
 
-hostprogs-y		    += gen_facilities
-hostprogs-y		    += gen_opcode_table
+hostprogs		    += gen_facilities
+hostprogs		    += gen_opcode_table
 
 HOSTCFLAGS_gen_facilities.o += $(LINUXINCLUDE)
 
diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
index ec8cd703b708..380e2b018992 100644
--- a/arch/sparc/boot/Makefile
+++ b/arch/sparc/boot/Makefile
@@ -7,7 +7,7 @@
 ROOT_IMG	:= /usr/src/root.img
 ELFTOAOUT	:= elftoaout
 
-hostprogs-y	:= piggyback
+hostprogs	:= piggyback
 targets		:= tftpboot.img image zImage vmlinux.aout
 clean-files	:= System.map
 
diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 997ffe46e953..708cb6304c2d 100644
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -41,7 +41,7 @@ $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
 	$(call if_changed,vdso)
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
-hostprogs-y			+= vdso2c
+hostprogs += vdso2c
 
 quiet_cmd_vdso2c = VDSO2C  $@
       cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 748b6d28a91d..012b82fc8617 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -45,8 +45,8 @@ setup-y		+= video-vesa.o
 setup-y		+= video-bios.o
 
 targets		+= $(setup-y)
-hostprogs-y	:= tools/build
-hostprogs-$(CONFIG_X86_FEATURE_NAMES) += mkcpustr
+hostprogs	:= tools/build
+hostprogs	+= mkcpustr
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include \
 		    -include include/generated/autoconf.h \
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 56aa5fa0a66b..26050ae0b27e 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -58,7 +58,7 @@ KBUILD_LDFLAGS += $(shell $(LD) --help 2>&1 | grep -q "\-z noreloc-overflow" \
 endif
 LDFLAGS_vmlinux := -T
 
-hostprogs-y	:= mkpiggy
+hostprogs	:= mkpiggy
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 
 sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(_text\|__bss_start\|_end\)$$/\#define VO_\2 _AC(0x\1,UL)/p'
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 2b75e80f6b41..433a1259f61d 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -59,7 +59,7 @@ $(obj)/vdso64.so.dbg: $(obj)/vdso.lds $(vobjs) FORCE
 	$(call if_changed,vdso_and_check)
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include -I$(srctree)/include/uapi -I$(srctree)/arch/$(SUBARCH)/include/uapi
-hostprogs-y			+= vdso2c
+hostprogs += vdso2c
 
 quiet_cmd_vdso2c = VDSO2C  $@
       cmd_vdso2c = $(obj)/vdso2c $< $(<:%.dbg=%) $@
diff --git a/arch/x86/realmode/rm/Makefile b/arch/x86/realmode/rm/Makefile
index f60501a384f9..99b6332ba540 100644
--- a/arch/x86/realmode/rm/Makefile
+++ b/arch/x86/realmode/rm/Makefile
@@ -12,7 +12,7 @@ OBJECT_FILES_NON_STANDARD	:= y
 # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
 KCOV_INSTRUMENT		:= n
 
-always := realmode.bin realmode.relocs
+always-y := realmode.bin realmode.relocs
 
 wakeup-objs	:= wakeup_asm.o wakemain.o video-mode.o
 wakeup-objs	+= copy.o bioscall.o regs.o
diff --git a/arch/x86/tools/Makefile b/arch/x86/tools/Makefile
index 09af7ff53044..55b1ab378974 100644
--- a/arch/x86/tools/Makefile
+++ b/arch/x86/tools/Makefile
@@ -26,7 +26,7 @@ posttest: $(obj)/insn_decoder_test vmlinux $(obj)/insn_sanity
 	$(call cmd,posttest)
 	$(call cmd,sanitytest)
 
-hostprogs-y	+= insn_decoder_test insn_sanity
+hostprogs += insn_decoder_test insn_sanity
 
 # -I needed for generated C source and C source which in the kernel tree.
 HOSTCFLAGS_insn_decoder_test.o := -Wall -I$(objtree)/arch/x86/lib/ -I$(srctree)/arch/x86/include/uapi/ -I$(srctree)/arch/x86/include/ -I$(srctree)/arch/x86/lib/ -I$(srctree)/include/uapi/
@@ -39,7 +39,7 @@ $(obj)/insn_decoder_test.o: $(srctree)/arch/x86/lib/insn.c $(srctree)/arch/x86/l
 $(obj)/insn_sanity.o: $(srctree)/arch/x86/lib/insn.c $(srctree)/arch/x86/lib/inat.c $(srctree)/arch/x86/include/asm/inat_types.h $(srctree)/arch/x86/include/asm/inat.h $(srctree)/arch/x86/include/asm/insn.h $(objtree)/arch/x86/lib/inat-tables.c
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
-hostprogs-y	+= relocs
+hostprogs	+= relocs
 relocs-objs     := relocs_32.o relocs_64.o relocs_common.o
 PHONY += relocs
 relocs: $(obj)/relocs
diff --git a/drivers/gpu/drm/radeon/Makefile b/drivers/gpu/drm/radeon/Makefile
index 92ccd7aed0d4..c693b2ca0329 100644
--- a/drivers/gpu/drm/radeon/Makefile
+++ b/drivers/gpu/drm/radeon/Makefile
@@ -5,7 +5,7 @@
 
 ccflags-y := -Idrivers/gpu/drm/amd/include
 
-hostprogs-y := mkregtable
+hostprogs := mkregtable
 clean-files := rn50_reg_safe.h r100_reg_safe.h r200_reg_safe.h rv515_reg_safe.h r300_reg_safe.h r420_reg_safe.h rs600_reg_safe.h r600_reg_safe.h evergreen_reg_safe.h cayman_reg_safe.h
 
 quiet_cmd_mkregtable = MKREGTABLE $@
diff --git a/drivers/tty/vt/Makefile b/drivers/tty/vt/Makefile
index 329ca336b8ee..fe30ce512819 100644
--- a/drivers/tty/vt/Makefile
+++ b/drivers/tty/vt/Makefile
@@ -12,7 +12,7 @@ obj-$(CONFIG_HW_CONSOLE)		+= vt.o defkeymap.o
 # Files generated that shall be removed upon make clean
 clean-files := consolemap_deftbl.c defkeymap.c
 
-hostprogs-y += conmakehash
+hostprogs += conmakehash
 
 quiet_cmd_conmk = CONMK   $@
       cmd_conmk = $(obj)/conmakehash $< > $@
diff --git a/drivers/video/logo/Makefile b/drivers/video/logo/Makefile
index bcda657493a4..895c60b8402e 100644
--- a/drivers/video/logo/Makefile
+++ b/drivers/video/logo/Makefile
@@ -18,7 +18,7 @@ obj-$(CONFIG_SPU_BASE)			+= logo_spe_clut224.o
 
 # How to generate logo's
 
-hostprogs-y := pnmtologo
+hostprogs := pnmtologo
 
 # Create commands like "pnmtologo -t mono -n logo_mac_mono -o ..."
 quiet_cmd_logo = LOGO    $@
diff --git a/drivers/zorro/Makefile b/drivers/zorro/Makefile
index b360ac4ea846..91ba82e633e7 100644
--- a/drivers/zorro/Makefile
+++ b/drivers/zorro/Makefile
@@ -7,7 +7,7 @@ obj-$(CONFIG_ZORRO)	+= zorro.o zorro-driver.o zorro-sysfs.o
 obj-$(CONFIG_PROC_FS)	+= proc.o
 obj-$(CONFIG_ZORRO_NAMES) +=  names.o
 
-hostprogs-y 		:= gen-devlist
+hostprogs		:= gen-devlist
 
 # Files generated that shall be removed upon make clean
 clean-files := devlist.h
diff --git a/fs/unicode/Makefile b/fs/unicode/Makefile
index d46e9baee285..b88aecc86550 100644
--- a/fs/unicode/Makefile
+++ b/fs/unicode/Makefile
@@ -35,4 +35,4 @@ $(obj)/utf8data.h: $(src)/utf8data.h_shipped FORCE
 endif
 
 targets += utf8data.h
-hostprogs-y += mkutf8data
+hostprogs += mkutf8data
diff --git a/lib/Makefile b/lib/Makefile
index 23ca78d43d24..8508143d3b76 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -239,8 +239,8 @@ obj-$(CONFIG_ASN1) += asn1_decoder.o
 
 obj-$(CONFIG_FONT_SUPPORT) += fonts/
 
-hostprogs-y	:= gen_crc32table
-hostprogs-y	+= gen_crc64table
+hostprogs	:= gen_crc32table
+hostprogs	+= gen_crc64table
 clean-files	:= crc32table.h
 clean-files	+= crc64table.h
 
diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile
index 0083b5cc646c..b4c0df6d706d 100644
--- a/lib/raid6/Makefile
+++ b/lib/raid6/Makefile
@@ -10,7 +10,7 @@ raid6_pq-$(CONFIG_ALTIVEC) += altivec1.o altivec2.o altivec4.o altivec8.o \
 raid6_pq-$(CONFIG_KERNEL_MODE_NEON) += neon.o neon1.o neon2.o neon4.o neon8.o recov_neon.o recov_neon_inner.o
 raid6_pq-$(CONFIG_S390) += s390vx8.o recov_s390xc.o
 
-hostprogs-y	+= mktables
+hostprogs	+= mktables
 
 ifeq ($(CONFIG_ALTIVEC),y)
 altivec_flags := -maltivec $(call cc-option,-mabi=altivec)
diff --git a/net/bpfilter/Makefile b/net/bpfilter/Makefile
index aa945ab5b655..36580301da70 100644
--- a/net/bpfilter/Makefile
+++ b/net/bpfilter/Makefile
@@ -3,7 +3,7 @@
 # Makefile for the Linux BPFILTER layer.
 #
 
-hostprogs-y := bpfilter_umh
+hostprogs := bpfilter_umh
 bpfilter_umh-objs := main.o
 KBUILD_HOSTCFLAGS += -I $(srctree)/tools/include/ -I $(srctree)/tools/include/uapi
 HOSTCC := $(CC)
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index b0e8adf7eb01..79b0fee6943b 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -111,65 +111,65 @@ ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
 hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
 
 # Tell kbuild to always build the programs
-always := $(tprogs-y)
-always += sockex1_kern.o
-always += sockex2_kern.o
-always += sockex3_kern.o
-always += tracex1_kern.o
-always += tracex2_kern.o
-always += tracex3_kern.o
-always += tracex4_kern.o
-always += tracex5_kern.o
-always += tracex6_kern.o
-always += tracex7_kern.o
-always += sock_flags_kern.o
-always += test_probe_write_user_kern.o
-always += trace_output_kern.o
-always += tcbpf1_kern.o
-always += tc_l2_redirect_kern.o
-always += lathist_kern.o
-always += offwaketime_kern.o
-always += spintest_kern.o
-always += map_perf_test_kern.o
-always += test_overhead_tp_kern.o
-always += test_overhead_raw_tp_kern.o
-always += test_overhead_kprobe_kern.o
-always += parse_varlen.o parse_simple.o parse_ldabs.o
-always += test_cgrp2_tc_kern.o
-always += xdp1_kern.o
-always += xdp2_kern.o
-always += xdp_router_ipv4_kern.o
-always += test_current_task_under_cgroup_kern.o
-always += trace_event_kern.o
-always += sampleip_kern.o
-always += lwt_len_hist_kern.o
-always += xdp_tx_iptunnel_kern.o
-always += test_map_in_map_kern.o
-always += tcp_synrto_kern.o
-always += tcp_rwnd_kern.o
-always += tcp_bufs_kern.o
-always += tcp_cong_kern.o
-always += tcp_iw_kern.o
-always += tcp_clamp_kern.o
-always += tcp_basertt_kern.o
-always += tcp_tos_reflect_kern.o
-always += tcp_dumpstats_kern.o
-always += xdp_redirect_kern.o
-always += xdp_redirect_map_kern.o
-always += xdp_redirect_cpu_kern.o
-always += xdp_monitor_kern.o
-always += xdp_rxq_info_kern.o
-always += xdp2skb_meta_kern.o
-always += syscall_tp_kern.o
-always += cpustat_kern.o
-always += xdp_adjust_tail_kern.o
-always += xdp_fwd_kern.o
-always += task_fd_query_kern.o
-always += xdp_sample_pkts_kern.o
-always += ibumad_kern.o
-always += hbm_out_kern.o
-always += hbm_edt_kern.o
-always += xdpsock_kern.o
+always-y := $(tprogs-y)
+always-y += sockex1_kern.o
+always-y += sockex2_kern.o
+always-y += sockex3_kern.o
+always-y += tracex1_kern.o
+always-y += tracex2_kern.o
+always-y += tracex3_kern.o
+always-y += tracex4_kern.o
+always-y += tracex5_kern.o
+always-y += tracex6_kern.o
+always-y += tracex7_kern.o
+always-y += sock_flags_kern.o
+always-y += test_probe_write_user_kern.o
+always-y += trace_output_kern.o
+always-y += tcbpf1_kern.o
+always-y += tc_l2_redirect_kern.o
+always-y += lathist_kern.o
+always-y += offwaketime_kern.o
+always-y += spintest_kern.o
+always-y += map_perf_test_kern.o
+always-y += test_overhead_tp_kern.o
+always-y += test_overhead_raw_tp_kern.o
+always-y += test_overhead_kprobe_kern.o
+always-y += parse_varlen.o parse_simple.o parse_ldabs.o
+always-y += test_cgrp2_tc_kern.o
+always-y += xdp1_kern.o
+always-y += xdp2_kern.o
+always-y += xdp_router_ipv4_kern.o
+always-y += test_current_task_under_cgroup_kern.o
+always-y += trace_event_kern.o
+always-y += sampleip_kern.o
+always-y += lwt_len_hist_kern.o
+always-y += xdp_tx_iptunnel_kern.o
+always-y += test_map_in_map_kern.o
+always-y += tcp_synrto_kern.o
+always-y += tcp_rwnd_kern.o
+always-y += tcp_bufs_kern.o
+always-y += tcp_cong_kern.o
+always-y += tcp_iw_kern.o
+always-y += tcp_clamp_kern.o
+always-y += tcp_basertt_kern.o
+always-y += tcp_tos_reflect_kern.o
+always-y += tcp_dumpstats_kern.o
+always-y += xdp_redirect_kern.o
+always-y += xdp_redirect_map_kern.o
+always-y += xdp_redirect_cpu_kern.o
+always-y += xdp_monitor_kern.o
+always-y += xdp_rxq_info_kern.o
+always-y += xdp2skb_meta_kern.o
+always-y += syscall_tp_kern.o
+always-y += cpustat_kern.o
+always-y += xdp_adjust_tail_kern.o
+always-y += xdp_fwd_kern.o
+always-y += task_fd_query_kern.o
+always-y += xdp_sample_pkts_kern.o
+always-y += ibumad_kern.o
+always-y += hbm_out_kern.o
+always-y += hbm_edt_kern.o
+always-y += xdpsock_kern.o
 
 ifeq ($(ARCH), arm)
 # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
diff --git a/samples/connector/Makefile b/samples/connector/Makefile
index 6ad71620e503..b785cbde5ffa 100644
--- a/samples/connector/Makefile
+++ b/samples/connector/Makefile
@@ -2,12 +2,8 @@
 obj-$(CONFIG_SAMPLE_CONNECTOR) += cn_test.o
 
 # List of programs to build
-ifdef CONFIG_SAMPLE_CONNECTOR
-hostprogs-y := ucon
-endif
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
+hostprogs := ucon
+always-y := $(hostprogs)
 
 HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
 
diff --git a/samples/hidraw/Makefile b/samples/hidraw/Makefile
index dec1b22adf54..8bd25f77671f 100644
--- a/samples/hidraw/Makefile
+++ b/samples/hidraw/Makefile
@@ -1,9 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 # List of programs to build
-hostprogs-y := hid-example
-
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
+hostprogs := hid-example
+always-y := $(hostprogs)
 
 HOSTCFLAGS_hid-example.o += -I$(objtree)/usr/include
 
diff --git a/samples/mei/Makefile b/samples/mei/Makefile
index 27f37efdadb4..f5b9d02be2cd 100644
--- a/samples/mei/Makefile
+++ b/samples/mei/Makefile
@@ -1,10 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 # Copyright (c) 2012-2019, Intel Corporation. All rights reserved.
 
-hostprogs-y := mei-amt-version
+hostprogs := mei-amt-version
 
 HOSTCFLAGS_mei-amt-version.o += -I$(objtree)/usr/include
 
-always := $(hostprogs-y)
+always-y := $(hostprogs)
 
 all: mei-amt-version
diff --git a/samples/pidfd/Makefile b/samples/pidfd/Makefile
index 0ff97784177a..ee2979849d92 100644
--- a/samples/pidfd/Makefile
+++ b/samples/pidfd/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-hostprogs-y := pidfd-metadata
-always := $(hostprogs-y)
+hostprogs := pidfd-metadata
+always-y := $(hostprogs)
 HOSTCFLAGS_pidfd-metadata.o += -I$(objtree)/usr/include
 all: pidfd-metadata
diff --git a/samples/seccomp/Makefile b/samples/seccomp/Makefile
index 009775b52538..89279e8b87df 100644
--- a/samples/seccomp/Makefile
+++ b/samples/seccomp/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 ifndef CROSS_COMPILE
-hostprogs-y := bpf-fancy dropper bpf-direct user-trap
+hostprogs := bpf-fancy dropper bpf-direct user-trap
 
 HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include
 HOSTCFLAGS_bpf-fancy.o += -idirafter $(objtree)/include
@@ -40,5 +40,5 @@ HOSTLDLIBS_bpf-fancy += $(MFLAG)
 HOSTLDLIBS_dropper += $(MFLAG)
 HOSTLDLIBS_user-trap += $(MFLAG)
 endif
-always := $(hostprogs-y)
+always-y := $(hostprogs)
 endif
diff --git a/samples/uhid/Makefile b/samples/uhid/Makefile
index 8c9bc9f98d37..5f44ea40d6d5 100644
--- a/samples/uhid/Makefile
+++ b/samples/uhid/Makefile
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 # List of programs to build
-hostprogs-y := uhid-example
+hostprogs := uhid-example
 
 # Tell kbuild to always build the programs
-always := $(hostprogs-y)
+always-y := $(hostprogs)
 
 HOSTCFLAGS_uhid-example.o += -I$(objtree)/usr/include
diff --git a/samples/vfs/Makefile b/samples/vfs/Makefile
index e21c9f6fe9be..65acdde5c117 100644
--- a/samples/vfs/Makefile
+++ b/samples/vfs/Makefile
@@ -1,11 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0-only
 # List of programs to build
-hostprogs-y := \
+hostprogs := \
 	test-fsmount \
 	test-statx
 
-# Tell kbuild to always build the programs
-always := $(hostprogs-y)
+always-y := $(hostprogs)
 
 HOSTCFLAGS_test-fsmount.o += -I$(objtree)/usr/include
 HOSTCFLAGS_test-statx.o += -I$(objtree)/usr/include
diff --git a/scripts/Makefile b/scripts/Makefile
index 4d41f48e7376..5e75802b1a44 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -7,14 +7,14 @@
 
 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 
-hostprogs-$(CONFIG_BUILD_BIN2C)  += bin2c
-hostprogs-$(CONFIG_KALLSYMS)     += kallsyms
-hostprogs-$(BUILD_C_RECORDMCOUNT) += recordmcount
-hostprogs-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
-hostprogs-$(CONFIG_ASN1)	 += asn1_compiler
-hostprogs-$(CONFIG_MODULE_SIG_FORMAT) += sign-file
-hostprogs-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += extract-cert
-hostprogs-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
+always-$(CONFIG_BUILD_BIN2C)			+= bin2c
+always-$(CONFIG_KALLSYMS)			+= kallsyms
+always-$(BUILD_C_RECORDMCOUNT)			+= recordmcount
+always-$(CONFIG_BUILDTIME_TABLE_SORT)		+= sorttable
+always-$(CONFIG_ASN1)				+= asn1_compiler
+always-$(CONFIG_MODULE_SIG_FORMAT)		+= sign-file
+always-$(CONFIG_SYSTEM_TRUSTED_KEYRING)		+= extract-cert
+always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE)	+= insert-sys-cert
 
 HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
 HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
@@ -30,10 +30,10 @@ HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED
 HOSTLDLIBS_sorttable = -lpthread
 endif
 
-always		:= $(hostprogs-y) $(hostprogs-m)
+hostprogs := $(always-y) $(always-m)
 
-# The following hostprogs-y programs are only build on demand
-hostprogs-y += unifdef
+# The following programs are only built on demand
+hostprogs += unifdef
 
 subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins
 subdir-$(CONFIG_MODVERSIONS) += genksyms
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index a562d695f0fa..a1730d42e5f3 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -16,6 +16,8 @@ obj-m :=
 lib-y :=
 lib-m :=
 always :=
+always-y :=
+always-m :=
 targets :=
 subdir-y :=
 subdir-m :=
@@ -44,7 +46,7 @@ include $(kbuild-file)
 include scripts/Makefile.lib
 
 # Do not include host rules unless needed
-ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
+ifneq ($(hostprogs)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
 include scripts/Makefile.host
 endif
 
@@ -348,7 +350,7 @@ $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE
 	$(call if_changed_rule,as_o_S)
 
 targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y)
-targets += $(extra-y) $(MAKECMDGOALS) $(always)
+targets += $(extra-y) $(always-y) $(MAKECMDGOALS)
 
 # Linker scripts preprocessor (.lds.S -> .lds)
 # ---------------------------------------------------------------------------
@@ -490,7 +492,7 @@ else
 
 __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
 	 $(if $(KBUILD_MODULES),$(obj-m) $(mod-targets) $(modorder-target)) \
-	 $(subdir-ym) $(always)
+	 $(subdir-ym) $(always-y)
 	@:
 
 endif
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index e367eb95c5c0..1e4206566a82 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -28,8 +28,8 @@ subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
 # directory
 
 __clean-files	:= $(extra-y) $(extra-m) $(extra-)       \
-		   $(always) $(targets) $(clean-files)   \
-		   $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
+		   $(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files)   \
+		   $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
 		   $(hostlibs-y) $(hostlibs-m) $(hostlibs-) \
 		   $(hostcxxlibs-y) $(hostcxxlibs-m)
 
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 4c51c95d40f4..3b7121d43324 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -24,21 +24,21 @@ $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
 # Both C and C++ are supported, but preferred language is C for such utilities.
 #
 # Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
-# hostprogs-y := bin2hex
+# hostprogs := bin2hex
 # Will compile bin2hex.c and create an executable named bin2hex
 #
-# hostprogs-y    := lxdialog
+# hostprogs     := lxdialog
 # lxdialog-objs := checklist.o lxdialog.o
 # Will compile lxdialog.c and checklist.c, and then link the executable
 # lxdialog, based on checklist.o and lxdialog.o
 #
-# hostprogs-y      := qconf
+# hostprogs       := qconf
 # qconf-cxxobjs   := qconf.o
 # qconf-objs      := menu.o
 # Will compile qconf as a C++ program, and menu as a C program.
 # They are linked as C++ code to the executable qconf
 
-__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
+__hostprogs := $(sort $(hostprogs))
 host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
 
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index d10f7a03e0ee..bae62549e3d2 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -4,6 +4,8 @@ asflags-y  += $(EXTRA_AFLAGS)
 ccflags-y  += $(EXTRA_CFLAGS)
 cppflags-y += $(EXTRA_CPPFLAGS)
 ldflags-y  += $(EXTRA_LDFLAGS)
+always-y   += $(always)
+hostprogs  += $(hostprogs-y) $(hostprogs-m)
 
 # flags that take effect in current and sub directories
 KBUILD_AFLAGS += $(subdir-asflags-y)
@@ -59,6 +61,8 @@ subdir-obj-y := $(filter %/built-in.a, $(obj-y))
 real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
 real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)) $($(m:.o=-))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
 
+always-y += $(always-m)
+
 # DTB
 # If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
 extra-y				+= $(dtb-y)
@@ -72,7 +76,7 @@ endif
 # Add subdir path
 
 extra-y		:= $(addprefix $(obj)/,$(extra-y))
-always		:= $(addprefix $(obj)/,$(always))
+always-y	:= $(addprefix $(obj)/,$(always-y))
 targets		:= $(addprefix $(obj)/,$(targets))
 modorder	:= $(addprefix $(obj)/,$(modorder))
 obj-m		:= $(addprefix $(obj)/,$(obj-m))
diff --git a/scripts/basic/Makefile b/scripts/basic/Makefile
index 7c9cb80d097b..290dd27d2809 100644
--- a/scripts/basic/Makefile
+++ b/scripts/basic/Makefile
@@ -2,5 +2,5 @@
 #
 # fixdep: used to generate dependency information during build process
 
-hostprogs-y	:= fixdep
-always		:= $(hostprogs-y)
+hostprogs	:= fixdep
+always-y	:= $(hostprogs)
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index b5a5b1c548c9..3acbb410904c 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 # scripts/dtc makefile
 
-hostprogs-$(CONFIG_DTC) := dtc
-always		:= $(hostprogs-y)
+hostprogs		:= dtc
+always-$(CONFIG_DTC)	:= $(hostprogs)
 
 dtc-objs	:= dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
 		   srcpos.o checks.o util.o
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index aa0d0ec6936d..f2ee8bd7abc6 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -23,7 +23,7 @@ $(objtree)/$(obj)/randomize_layout_seed.h: FORCE
 targets = randomize_layout_seed.h randomize_layout_hash.h
 
 $(HOSTLIBS)-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
-always := $($(HOSTLIBS)-y)
+always-y := $($(HOSTLIBS)-y)
 
 $(foreach p,$($(HOSTLIBS)-y:%.so=%),$(eval $(p)-objs := $(p).o))
 
diff --git a/scripts/genksyms/Makefile b/scripts/genksyms/Makefile
index 78629f515e78..d328de1e10ee 100644
--- a/scripts/genksyms/Makefile
+++ b/scripts/genksyms/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
-hostprogs-y	:= genksyms
-always		:= $(hostprogs-y)
+hostprogs	:= genksyms
+always-y	:= $(hostprogs)
 
 genksyms-objs	:= genksyms.o parse.tab.o lex.lex.o
 
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index fbeb62ae3401..5887ceb6229e 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -157,11 +157,11 @@ HOSTCFLAGS_lexer.lex.o	:= -I $(srctree)/$(src)
 HOSTCFLAGS_parser.tab.o	:= -I $(srctree)/$(src)
 
 # conf: Used for defconfig, oldconfig and related targets
-hostprogs-y	+= conf
+hostprogs	+= conf
 conf-objs	:= conf.o $(common-objs)
 
 # nconf: Used for the nconfig target based on ncurses
-hostprogs-y	+= nconf
+hostprogs	+= nconf
 nconf-objs	:= nconf.o nconf.gui.o $(common-objs)
 
 HOSTLDLIBS_nconf	= $(shell . $(obj)/nconf-cfg && echo $$libs)
@@ -171,7 +171,7 @@ HOSTCFLAGS_nconf.gui.o	= $(shell . $(obj)/nconf-cfg && echo $$cflags)
 $(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/nconf-cfg
 
 # mconf: Used for the menuconfig target based on lxdialog
-hostprogs-y	+= mconf
+hostprogs	+= mconf
 lxdialog	:= $(addprefix lxdialog/, \
 		     checklist.o inputbox.o menubox.o textbox.o util.o yesno.o)
 mconf-objs	:= mconf.o $(lxdialog) $(common-objs)
@@ -183,7 +183,7 @@ $(foreach f, mconf.o $(lxdialog), \
 $(addprefix $(obj)/, mconf.o $(lxdialog)): $(obj)/mconf-cfg
 
 # qconf: Used for the xconfig target based on Qt
-hostprogs-y	+= qconf
+hostprogs	+= qconf
 qconf-cxxobjs	:= qconf.o
 qconf-objs	:= images.o $(common-objs)
 
@@ -199,7 +199,7 @@ $(obj)/%.moc: $(src)/%.h $(obj)/qconf-cfg
 	$(call cmd,moc)
 
 # gconf: Used for the gconfig target based on GTK+
-hostprogs-y	+= gconf
+hostprogs	+= gconf
 gconf-objs	:= gconf.o images.o $(common-objs)
 
 HOSTLDLIBS_gconf    = $(shell . $(obj)/gconf-cfg && echo $$libs)
diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
index 42c5d50f2bcc..296b6a3878b2 100644
--- a/scripts/mod/Makefile
+++ b/scripts/mod/Makefile
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
 OBJECT_FILES_NON_STANDARD := y
 
-hostprogs-y	:= modpost mk_elfconfig
-always		:= $(hostprogs-y) empty.o
+hostprogs	:= modpost mk_elfconfig
+always-y	:= $(hostprogs) empty.o
 
 modpost-objs	:= modpost.o file2alias.o sumversion.o
 
diff --git a/scripts/selinux/genheaders/Makefile b/scripts/selinux/genheaders/Makefile
index e8c533140981..70cf8d95d07c 100644
--- a/scripts/selinux/genheaders/Makefile
+++ b/scripts/selinux/genheaders/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
-hostprogs-y	:= genheaders
+hostprogs	:= genheaders
 HOST_EXTRACFLAGS += \
 	-I$(srctree)/include/uapi -I$(srctree)/include \
 	-I$(srctree)/security/selinux/include
 
-always		:= $(hostprogs-y)
+always-y	:= $(hostprogs)
diff --git a/scripts/selinux/mdp/Makefile b/scripts/selinux/mdp/Makefile
index 8a1269a9d0ba..3026f3c2aa2b 100644
--- a/scripts/selinux/mdp/Makefile
+++ b/scripts/selinux/mdp/Makefile
@@ -1,8 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0
-hostprogs-y	:= mdp
+hostprogs	:= mdp
 HOST_EXTRACFLAGS += \
 	-I$(srctree)/include/uapi -I$(srctree)/include \
 	-I$(srctree)/security/selinux/include -I$(objtree)/include
 
-always		:= $(hostprogs-y)
+always-y	:= $(hostprogs)
 clean-files	:= policy.* file_contexts
diff --git a/usr/Makefile b/usr/Makefile
index 244862bfb765..18aed2ab98da 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -52,7 +52,7 @@ ifeq ($(cpio-data),)
 
 cpio-data := $(obj)/initramfs_data.cpio
 
-hostprogs-y := gen_init_cpio
+hostprogs := gen_init_cpio
 
 # .initramfs_data.cpio.d is used to identify all files included
 # in initramfs and to detect if any files are added/removed.
-- 
cgit v1.2.3


From be9f6133f8770bb9c5f4a3cb3df6d30d7d3f7e5b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 2 Feb 2020 14:09:20 +0900
Subject: scripts/kallsyms: rename local variables in read_symbol()

I will use 'sym' for the point to struce sym_entry in the next commit.
Rename 'sym', 'stype' to 'name', 'type', which are more intuitive.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kallsyms.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 94153732ec00..5c34edd98b3e 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -176,43 +176,43 @@ static void check_symbol_range(const char *sym, unsigned long long addr,
 
 static int read_symbol(FILE *in, struct sym_entry *s)
 {
-	char sym[500], stype;
+	char name[500], type;
 	int rc;
 
-	rc = fscanf(in, "%llx %c %499s\n", &s->addr, &stype, sym);
+	rc = fscanf(in, "%llx %c %499s\n", &s->addr, &type, name);
 	if (rc != 3) {
-		if (rc != EOF && fgets(sym, 500, in) == NULL)
+		if (rc != EOF && fgets(name, 500, in) == NULL)
 			fprintf(stderr, "Read error or end of file.\n");
 		return -1;
 	}
-	if (strlen(sym) >= KSYM_NAME_LEN) {
+	if (strlen(name) >= KSYM_NAME_LEN) {
 		fprintf(stderr, "Symbol %s too long for kallsyms (%zu >= %d).\n"
 				"Please increase KSYM_NAME_LEN both in kernel and kallsyms.c\n",
-			sym, strlen(sym), KSYM_NAME_LEN);
+			name, strlen(name), KSYM_NAME_LEN);
 		return -1;
 	}
 
-	if (is_ignored_symbol(sym, stype))
+	if (is_ignored_symbol(name, type))
 		return -1;
 
 	/* Ignore most absolute/undefined (?) symbols. */
-	if (strcmp(sym, "_text") == 0)
+	if (strcmp(name, "_text") == 0)
 		_text = s->addr;
 
-	check_symbol_range(sym, s->addr, text_ranges, ARRAY_SIZE(text_ranges));
-	check_symbol_range(sym, s->addr, &percpu_range, 1);
+	check_symbol_range(name, s->addr, text_ranges, ARRAY_SIZE(text_ranges));
+	check_symbol_range(name, s->addr, &percpu_range, 1);
 
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */
-	s->len = strlen(sym) + 1;
+	s->len = strlen(name) + 1;
 	s->sym = malloc(s->len + 1);
 	if (!s->sym) {
 		fprintf(stderr, "kallsyms failure: "
 			"unable to allocate required amount of memory\n");
 		exit(EXIT_FAILURE);
 	}
-	strcpy(sym_name(s), sym);
-	s->sym[0] = stype;
+	strcpy(sym_name(s), name);
+	s->sym[0] = type;
 
 	s->percpu_absolute = 0;
 
-- 
cgit v1.2.3


From 8d60526999aace135de37220ec94ba40bc792234 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 2 Feb 2020 14:09:21 +0900
Subject: scripts/kallsyms: change table to store (strcut sym_entry *)

The symbol table is extended every 10000 addition by using realloc(),
where data copy might occur to the new buffer.

To decrease the amount of possible data copy, let's change the table
to store the pointer.

The symbol type + symbol name part is appended at the end of
(struct sym_entry), and allocated together with the struct body.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kallsyms.c | 121 ++++++++++++++++++++++++++++-------------------------
 1 file changed, 65 insertions(+), 56 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 5c34edd98b3e..a566d8201b56 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -33,8 +33,8 @@ struct sym_entry {
 	unsigned long long addr;
 	unsigned int len;
 	unsigned int start_pos;
-	unsigned char *sym;
 	unsigned int percpu_absolute;
+	unsigned char sym[0];
 };
 
 struct addr_range {
@@ -55,7 +55,7 @@ static struct addr_range percpu_range = {
 	"__per_cpu_start", "__per_cpu_end", -1ULL, 0
 };
 
-static struct sym_entry *table;
+static struct sym_entry **table;
 static unsigned int table_size, table_cnt;
 static int all_symbols;
 static int absolute_percpu;
@@ -174,49 +174,55 @@ static void check_symbol_range(const char *sym, unsigned long long addr,
 	}
 }
 
-static int read_symbol(FILE *in, struct sym_entry *s)
+static struct sym_entry *read_symbol(FILE *in)
 {
 	char name[500], type;
+	unsigned long long addr;
+	unsigned int len;
+	struct sym_entry *sym;
 	int rc;
 
-	rc = fscanf(in, "%llx %c %499s\n", &s->addr, &type, name);
+	rc = fscanf(in, "%llx %c %499s\n", &addr, &type, name);
 	if (rc != 3) {
 		if (rc != EOF && fgets(name, 500, in) == NULL)
 			fprintf(stderr, "Read error or end of file.\n");
-		return -1;
+		return NULL;
 	}
 	if (strlen(name) >= KSYM_NAME_LEN) {
 		fprintf(stderr, "Symbol %s too long for kallsyms (%zu >= %d).\n"
 				"Please increase KSYM_NAME_LEN both in kernel and kallsyms.c\n",
 			name, strlen(name), KSYM_NAME_LEN);
-		return -1;
+		return NULL;
 	}
 
 	if (is_ignored_symbol(name, type))
-		return -1;
+		return NULL;
 
 	/* Ignore most absolute/undefined (?) symbols. */
 	if (strcmp(name, "_text") == 0)
-		_text = s->addr;
+		_text = addr;
 
-	check_symbol_range(name, s->addr, text_ranges, ARRAY_SIZE(text_ranges));
-	check_symbol_range(name, s->addr, &percpu_range, 1);
+	check_symbol_range(name, addr, text_ranges, ARRAY_SIZE(text_ranges));
+	check_symbol_range(name, addr, &percpu_range, 1);
 
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */
-	s->len = strlen(name) + 1;
-	s->sym = malloc(s->len + 1);
-	if (!s->sym) {
+
+	len = strlen(name) + 1;
+
+	sym = malloc(sizeof(*sym) + len);
+	if (!sym) {
 		fprintf(stderr, "kallsyms failure: "
 			"unable to allocate required amount of memory\n");
 		exit(EXIT_FAILURE);
 	}
-	strcpy(sym_name(s), name);
-	s->sym[0] = type;
-
-	s->percpu_absolute = 0;
+	sym->addr = addr;
+	sym->len = len;
+	sym->sym[0] = type;
+	memcpy(sym_name(sym), name, len);
+	sym->percpu_absolute = 0;
 
-	return 0;
+	return sym;
 }
 
 static int symbol_in_range(const struct sym_entry *s,
@@ -268,12 +274,12 @@ static void shrink_table(void)
 
 	pos = 0;
 	for (i = 0; i < table_cnt; i++) {
-		if (symbol_valid(&table[i])) {
+		if (symbol_valid(table[i])) {
 			if (pos != i)
 				table[pos] = table[i];
 			pos++;
 		} else {
-			free(table[i].sym);
+			free(table[i]);
 		}
 	}
 	table_cnt = pos;
@@ -287,7 +293,15 @@ static void shrink_table(void)
 
 static void read_map(FILE *in)
 {
+	struct sym_entry *sym;
+
 	while (!feof(in)) {
+		sym = read_symbol(in);
+		if (!sym)
+			continue;
+
+		sym->start_pos = table_cnt;
+
 		if (table_cnt >= table_size) {
 			table_size += 10000;
 			table = realloc(table, sizeof(*table) * table_size);
@@ -296,10 +310,8 @@ static void read_map(FILE *in)
 				exit (1);
 			}
 		}
-		if (read_symbol(in, &table[table_cnt]) == 0) {
-			table[table_cnt].start_pos = table_cnt;
-			table_cnt++;
-		}
+
+		table[table_cnt++] = sym;
 	}
 }
 
@@ -387,27 +399,27 @@ static void write_src(void)
 			int overflow;
 
 			if (!absolute_percpu) {
-				offset = table[i].addr - relative_base;
+				offset = table[i]->addr - relative_base;
 				overflow = (offset < 0 || offset > UINT_MAX);
-			} else if (symbol_absolute(&table[i])) {
-				offset = table[i].addr;
+			} else if (symbol_absolute(table[i])) {
+				offset = table[i]->addr;
 				overflow = (offset < 0 || offset > INT_MAX);
 			} else {
-				offset = relative_base - table[i].addr - 1;
+				offset = relative_base - table[i]->addr - 1;
 				overflow = (offset < INT_MIN || offset >= 0);
 			}
 			if (overflow) {
 				fprintf(stderr, "kallsyms failure: "
 					"%s symbol value %#llx out of range in relative mode\n",
-					symbol_absolute(&table[i]) ? "absolute" : "relative",
-					table[i].addr);
+					symbol_absolute(table[i]) ? "absolute" : "relative",
+					table[i]->addr);
 				exit(EXIT_FAILURE);
 			}
 			printf("\t.long\t%#x\n", (int)offset);
-		} else if (!symbol_absolute(&table[i])) {
-			output_address(table[i].addr);
+		} else if (!symbol_absolute(table[i])) {
+			output_address(table[i]->addr);
 		} else {
-			printf("\tPTR\t%#llx\n", table[i].addr);
+			printf("\tPTR\t%#llx\n", table[i]->addr);
 		}
 	}
 	printf("\n");
@@ -437,12 +449,12 @@ static void write_src(void)
 		if ((i & 0xFF) == 0)
 			markers[i >> 8] = off;
 
-		printf("\t.byte 0x%02x", table[i].len);
-		for (k = 0; k < table[i].len; k++)
-			printf(", 0x%02x", table[i].sym[k]);
+		printf("\t.byte 0x%02x", table[i]->len);
+		for (k = 0; k < table[i]->len; k++)
+			printf(", 0x%02x", table[i]->sym[k]);
 		printf("\n");
 
-		off += table[i].len + 1;
+		off += table[i]->len + 1;
 	}
 	printf("\n");
 
@@ -496,7 +508,7 @@ static void build_initial_tok_table(void)
 	unsigned int i;
 
 	for (i = 0; i < table_cnt; i++)
-		learn_symbol(table[i].sym, table[i].len);
+		learn_symbol(table[i]->sym, table[i]->len);
 }
 
 static unsigned char *find_token(unsigned char *str, int len,
@@ -520,15 +532,15 @@ static void compress_symbols(const unsigned char *str, int idx)
 
 	for (i = 0; i < table_cnt; i++) {
 
-		len = table[i].len;
-		p1 = table[i].sym;
+		len = table[i]->len;
+		p1 = table[i]->sym;
 
 		/* find the token on the symbol */
 		p2 = find_token(p1, len, str);
 		if (!p2) continue;
 
 		/* decrease the counts for this symbol's tokens */
-		forget_symbol(table[i].sym, len);
+		forget_symbol(table[i]->sym, len);
 
 		size = len;
 
@@ -547,10 +559,10 @@ static void compress_symbols(const unsigned char *str, int idx)
 
 		} while (p2);
 
-		table[i].len = len;
+		table[i]->len = len;
 
 		/* increase the counts for this symbol's new tokens */
-		learn_symbol(table[i].sym, len);
+		learn_symbol(table[i]->sym, len);
 	}
 }
 
@@ -606,8 +618,8 @@ static void insert_real_symbols_in_table(void)
 	unsigned int i, j, c;
 
 	for (i = 0; i < table_cnt; i++) {
-		for (j = 0; j < table[i].len; j++) {
-			c = table[i].sym[j];
+		for (j = 0; j < table[i]->len; j++) {
+			c = table[i]->sym[j];
 			best_table[c][0]=c;
 			best_table_len[c]=1;
 		}
@@ -660,13 +672,10 @@ static int may_be_linker_script_provide_symbol(const struct sym_entry *se)
 
 static int compare_symbols(const void *a, const void *b)
 {
-	const struct sym_entry *sa;
-	const struct sym_entry *sb;
+	const struct sym_entry *sa = *(const struct sym_entry **)a;
+	const struct sym_entry *sb = *(const struct sym_entry **)b;
 	int wa, wb;
 
-	sa = a;
-	sb = b;
-
 	/* sort by address first */
 	if (sa->addr > sb->addr)
 		return 1;
@@ -697,7 +706,7 @@ static int compare_symbols(const void *a, const void *b)
 
 static void sort_symbols(void)
 {
-	qsort(table, table_cnt, sizeof(struct sym_entry), compare_symbols);
+	qsort(table, table_cnt, sizeof(table[0]), compare_symbols);
 }
 
 static void make_percpus_absolute(void)
@@ -705,14 +714,14 @@ static void make_percpus_absolute(void)
 	unsigned int i;
 
 	for (i = 0; i < table_cnt; i++)
-		if (symbol_in_range(&table[i], &percpu_range, 1)) {
+		if (symbol_in_range(table[i], &percpu_range, 1)) {
 			/*
 			 * Keep the 'A' override for percpu symbols to
 			 * ensure consistent behavior compared to older
 			 * versions of this tool.
 			 */
-			table[i].sym[0] = 'A';
-			table[i].percpu_absolute = 1;
+			table[i]->sym[0] = 'A';
+			table[i]->percpu_absolute = 1;
 		}
 }
 
@@ -722,12 +731,12 @@ static void record_relative_base(void)
 	unsigned int i;
 
 	for (i = 0; i < table_cnt; i++)
-		if (!symbol_absolute(&table[i])) {
+		if (!symbol_absolute(table[i])) {
 			/*
 			 * The table is sorted by address.
 			 * Take the first non-absolute symbol value.
 			 */
-			relative_base = table[i].addr;
+			relative_base = table[i]->addr;
 			return;
 		}
 }
-- 
cgit v1.2.3


From 1c948715a159d0d02c1e1c9228327ba3c408795c Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Mon, 3 Feb 2020 17:34:58 -0800
Subject: mm: remove __krealloc

Since 5.5-rc1 the last user of this function is gone, so remove the
functionality.

See commit
2ad9d7747c10 ("netfilter: conntrack: free extension area immediately")
for details.

Link: http://lkml.kernel.org/r/20191212223442.22141-1-fw@strlen.de
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/slab.h                    |  1 -
 mm/slab_common.c                        | 22 ----------------------
 scripts/coccinelle/free/devm_free.cocci |  4 ----
 3 files changed, 27 deletions(-)

(limited to 'scripts')

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 877a95c6a2d2..03a389358562 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -184,7 +184,6 @@ void memcg_deactivate_kmem_caches(struct mem_cgroup *, struct mem_cgroup *);
 /*
  * Common kmalloc functions provided by all allocators
  */
-void * __must_check __krealloc(const void *, size_t, gfp_t);
 void * __must_check krealloc(const void *, size_t, gfp_t);
 void kfree(const void *);
 void kzfree(const void *);
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 0d95ddea13b0..0c63c0d3dd38 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1676,28 +1676,6 @@ static __always_inline void *__do_krealloc(const void *p, size_t new_size,
 	return ret;
 }
 
-/**
- * __krealloc - like krealloc() but don't free @p.
- * @p: object to reallocate memory for.
- * @new_size: how many bytes of memory are required.
- * @flags: the type of memory to allocate.
- *
- * This function is like krealloc() except it never frees the originally
- * allocated buffer. Use this if you don't want to free the buffer immediately
- * like, for example, with RCU.
- *
- * Return: pointer to the allocated memory or %NULL in case of error
- */
-void *__krealloc(const void *p, size_t new_size, gfp_t flags)
-{
-	if (unlikely(!new_size))
-		return ZERO_SIZE_PTR;
-
-	return __do_krealloc(p, new_size, flags);
-
-}
-EXPORT_SYMBOL(__krealloc);
-
 /**
  * krealloc - reallocate memory. The contents will remain unchanged.
  * @p: object to reallocate memory for.
diff --git a/scripts/coccinelle/free/devm_free.cocci b/scripts/coccinelle/free/devm_free.cocci
index 9330d4294b74..3357bf4dbd7c 100644
--- a/scripts/coccinelle/free/devm_free.cocci
+++ b/scripts/coccinelle/free/devm_free.cocci
@@ -90,8 +90,6 @@ position p;
  kfree@p(x)
 |
  kzfree@p(x)
-|
- __krealloc@p(x, ...)
 |
  krealloc@p(x, ...)
 |
@@ -116,8 +114,6 @@ position p != safe.p;
 |
 * kzfree@p(x)
 |
-* __krealloc@p(x, ...)
-|
 * krealloc@p(x, ...)
 |
 * free_pages@p(x, ...)
-- 
cgit v1.2.3


From 089b7d890f972f6b649fedc9259f6b93a18fb970 Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Date: Tue, 4 Feb 2020 13:08:44 +0900
Subject: kconfig: Invalidate all symbols after changing to y or m.

Since commit 89b9060987d9 ("kconfig: Add yes2modconfig and
mod2yesconfig targets.") forgot to clear SYMBOL_VALID bit after
changing to y or m, these targets did not save the changes.
Call sym_clear_all_valid() so that all symbols are revalidated.

Fixes: 89b9060987d9 ("kconfig: Add yes2modconfig and mod2yesconfig targets.")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/confdata.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 63d307b0d1ac..a39d93e3c6ae 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -1331,9 +1331,8 @@ void conf_rewrite_mod_or_yes(enum conf_def_mode mode)
 
 	for_all_symbols(i, sym) {
 		if (sym_get_type(sym) == S_TRISTATE &&
-		    sym->def[S_DEF_USER].tri == old_val) {
+		    sym->def[S_DEF_USER].tri == old_val)
 			sym->def[S_DEF_USER].tri = new_val;
-			sym_add_change_count(1);
-		}
 	}
+	sym_clear_all_valid();
 }
-- 
cgit v1.2.3


From d1c9038ab5c1c96c0fd9d13ec56f2d650fe4c59f Mon Sep 17 00:00:00 2001
From: Stephen Kitt <steve@sk2.org>
Date: Fri, 24 Jan 2020 19:33:16 +0100
Subject: Allow git builds of Sphinx

When using a non-release version of Sphinx, from a local build (with
improvements for kernel doc handling, why not),

	sphinx-build --version

reports versions of the form

	sphinx-build 3.0.0+/4703d9119972

i.e. base version, a plus symbol, slash, and the start of the git hash
of whatever repository the command is run in (no, not the hash that
was used to build Sphinx!).

This patch fixes the installation check in sphinx-pre-install to
recognise such version output.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Link: https://lore.kernel.org/r/20200124183316.1719218-1-steve@sk2.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 scripts/sphinx-pre-install | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index 470ccfe678aa..a8f0c002a340 100755
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -272,7 +272,7 @@ sub check_sphinx()
 
 	open IN, "$sphinx --version 2>&1 |" or die "$sphinx returned an error";
 	while (<IN>) {
-		if (m/^\s*sphinx-build\s+([\d\.]+)$/) {
+		if (m/^\s*sphinx-build\s+([\d\.]+)(\+\/[\da-f]+)?$/) {
 			$cur_version=$1;
 			last;
 		}
-- 
cgit v1.2.3


From 9d1b38958b077f6c8d4bd196a115b643d7bd6717 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 11 Feb 2020 01:18:52 +0900
Subject: scripts/kallsyms: fix memory corruption caused by write over-run

memcpy() writes one more byte than allocated.

Fixes: 8d60526999aa ("scripts/kallsyms: change table to store (strcut sym_entry *)")
Reported-by: youling257 <youling257@gmail.com>
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Pavel Machek <pavel@ucw.cz>
---
 scripts/kallsyms.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index a566d8201b56..0133dfaaf352 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -210,7 +210,7 @@ static struct sym_entry *read_symbol(FILE *in)
 
 	len = strlen(name) + 1;
 
-	sym = malloc(sizeof(*sym) + len);
+	sym = malloc(sizeof(*sym) + len + 1);
 	if (!sym) {
 		fprintf(stderr, "kallsyms failure: "
 			"unable to allocate required amount of memory\n");
@@ -219,7 +219,7 @@ static struct sym_entry *read_symbol(FILE *in)
 	sym->addr = addr;
 	sym->len = len;
 	sym->sym[0] = type;
-	memcpy(sym_name(sym), name, len);
+	strcpy(sym_name(sym), name);
 	sym->percpu_absolute = 0;
 
 	return sym;
-- 
cgit v1.2.3


From 083bc0e1ce91e2a65a1aecdf8d2c5045e5d46c55 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 11 Feb 2020 05:06:34 +0900
Subject: kbuild: fix mismatch between .version and include/generated/compile.h

Since commit 56d589361572 ("kbuild: do not create orphan built-in.a or
obj-y objects"), scripts/link-vmlinux.sh does nothing when descending
into init/.

Once the version number becomes out of sync between .version and
include/generated/compile.h, it is not self-healing.

[How to reproduce]

 $ echo 100 > .version
 $ make

You will see the number in the .version is always bigger than that in
compile.h by one. After this, every time you run 'make', the vmlinux is
re-linked even when none of source files is updated.

Fixes: 56d589361572 ("kbuild: do not create orphan built-in.a or obj-y objects")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/link-vmlinux.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 1919c311c149..dd484e92752e 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -239,7 +239,7 @@ else
 fi;
 
 # final build of init/
-${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init
+${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1
 
 #link vmlinux.o
 info LD vmlinux.o
-- 
cgit v1.2.3


From ff5cd9accbc724a793904c6e401040c85be89748 Mon Sep 17 00:00:00 2001
From: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Date: Sun, 9 Feb 2020 16:00:57 +0200
Subject: ver_linux: Query ld cache for versions of libc/libcpp run-time

Query ld cache for versions of both libc and libcpp run-time, instead
of querying /proc/self/maps for libc run-time, and ld cache for libcpp
run-time, thus reducing code size and complexity.

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Link: https://lore.kernel.org/r/20200209140057.20181-1-alexander.kapshuk@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 scripts/ver_linux | 24 +++++++-----------------
 1 file changed, 7 insertions(+), 17 deletions(-)

(limited to 'scripts')

diff --git a/scripts/ver_linux b/scripts/ver_linux
index 85005d6b7f10..0968a3070eff 100755
--- a/scripts/ver_linux
+++ b/scripts/ver_linux
@@ -14,6 +14,8 @@ BEGIN {
 	printf("\n")
 
 	vernum = "[0-9]+([.]?[0-9]+)+"
+	libc = "libc[.]so[.][0-9]+$"
+	libcpp = "(libg|stdc)[+]+[.]so[.][0-9]+$"
 
 	printversion("GNU C", version("gcc -dumpversion"))
 	printversion("GNU Make", version("make --version"))
@@ -35,26 +37,14 @@ BEGIN {
 	printversion("Bison", version("bison --version"))
 	printversion("Flex", version("flex --version"))
 
-	while (getline <"/proc/self/maps" > 0) {
-		if (/libc.*\.so$/) {
-			n = split($0, procmaps, "/")
-			if (match(procmaps[n], vernum)) {
-				ver = substr(procmaps[n], RSTART, RLENGTH)
-				printversion("Linux C Library", ver)
-				break
-			}
-		}
+	while ("ldconfig -p 2>/dev/null" | getline > 0) {
+		if ($NF ~ libc && !seen[ver = version("readlink " $NF)]++)
+			printversion("Linux C Library", ver)
+		else if ($NF ~ libcpp && !seen[ver = version("readlink " $NF)]++)
+			printversion("Linux C++ Library", ver)
 	}
 
 	printversion("Dynamic linker (ldd)", version("ldd --version"))
-
-	while ("ldconfig -p 2>/dev/null" | getline > 0) {
-		if (/(libg|stdc)[+]+\.so/) {
-			libcpp = $NF
-			break
-		}
-	}
-	printversion("Linux C++ Library", version("readlink " libcpp))
 	printversion("Procps", version("ps --version"))
 	printversion("Net-tools", version("ifconfig --version"))
 	printversion("Kbd", version("loadkeys -V"))
-- 
cgit v1.2.3


From ef0c08192ac09e29ddd676b3ca6c4a501f277f10 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Thu, 20 Feb 2020 20:04:09 -0800
Subject: get_maintainer: remove uses of P: for maintainer name

Commit 1ca84ed6425f ("MAINTAINERS: Reclaim the P: tag for Maintainer
Entry Profile") changed the use of the "P:" tag from "Person" to
"Profile (ie: special subsystem coding styles and characteristics)"

Change how get_maintainer.pl parses the "P:" tag to match.

Link: http://lkml.kernel.org/r/ca53823fc5d25c0be32ad937d0207a0589c08643.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Dan Williams <dan.j.william@intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/get_maintainer.pl | 24 ------------------------
 1 file changed, 24 deletions(-)

(limited to 'scripts')

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index 34085d146fa2..a00156855354 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -1341,35 +1341,11 @@ sub add_categories {
 		    }
 		}
 	    } elsif ($ptype eq "M") {
-		my ($name, $address) = parse_email($pvalue);
-		if ($name eq "") {
-		    if ($i > 0) {
-			my $tv = $typevalue[$i - 1];
-			if ($tv =~ m/^([A-Z]):\s*(.*)/) {
-			    if ($1 eq "P") {
-				$name = $2;
-				$pvalue = format_email($name, $address, $email_usename);
-			    }
-			}
-		    }
-		}
 		if ($email_maintainer) {
 		    my $role = get_maintainer_role($i);
 		    push_email_addresses($pvalue, $role);
 		}
 	    } elsif ($ptype eq "R") {
-		my ($name, $address) = parse_email($pvalue);
-		if ($name eq "") {
-		    if ($i > 0) {
-			my $tv = $typevalue[$i - 1];
-			if ($tv =~ m/^([A-Z]):\s*(.*)/) {
-			    if ($1 eq "P") {
-				$name = $2;
-				$pvalue = format_email($name, $address, $email_usename);
-			    }
-			}
-		    }
-		}
 		if ($email_reviewer) {
 		    my $subsystem = get_subsystem_name($i);
 		    push_email_addresses($pvalue, "reviewer:$subsystem");
-- 
cgit v1.2.3


From 0ef82fcefb99300ede6f4d38a8100845b2dc8e30 Mon Sep 17 00:00:00 2001
From: Douglas Anderson <dianders@chromium.org>
Date: Thu, 20 Feb 2020 20:04:12 -0800
Subject: scripts/get_maintainer.pl: deprioritize old Fixes: addresses

Recently, I found that get_maintainer was causing me to send emails to
the old addresses for maintainers.  Since I usually just trust the
output of get_maintainer to know the right email address, I didn't even
look carefully and fired off two patch series that went to the wrong
place.  Oops.

The problem was introduced recently when trying to add signatures from
Fixes.  The problem was that these email addresses were added too early
in the process of compiling our list of places to send.  Things added to
the list earlier are considered more canonical and when we later added
maintainer entries we ended up deduplicating to the old address.

Here are two examples using mainline commits (to make it easier to
replicate) for the two maintainers that I messed up recently:

  $ git format-patch d8549bcd0529~..d8549bcd0529
  $ ./scripts/get_maintainer.pl 0001-clk-Add-clk_hw*.patch | grep Boyd
  Stephen Boyd <sboyd@codeaurora.org>...

  $ git format-patch 6d1238aa3395~..6d1238aa3395
  $ ./scripts/get_maintainer.pl 0001-arm64-dts-qcom-qcs404*.patch | grep Andy
  Andy Gross <andy.gross@linaro.org>

Let's move the adding of addresses from Fixes: to the end since the
email addresses from these are much more likely to be older.

After this patch the above examples get the right addresses for the two
examples.

Link: http://lkml.kernel.org/r/20200127095001.1.I41fba9f33590bfd92cd01960161d8384268c6569@changeid
Fixes: 2f5bd343694e ("scripts/get_maintainer.pl: add signatures from Fixes: <badcommit> lines in commit message")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/get_maintainer.pl | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/get_maintainer.pl b/scripts/get_maintainer.pl
index a00156855354..6cbcd1a3e113 100755
--- a/scripts/get_maintainer.pl
+++ b/scripts/get_maintainer.pl
@@ -932,10 +932,6 @@ sub get_maintainers {
 	}
     }
 
-    foreach my $fix (@fixes) {
-	vcs_add_commit_signers($fix, "blamed_fixes");
-    }
-
     foreach my $email (@email_to, @list_to) {
 	$email->[0] = deduplicate_email($email->[0]);
     }
@@ -974,6 +970,10 @@ sub get_maintainers {
 	}
     }
 
+    foreach my $fix (@fixes) {
+	vcs_add_commit_signers($fix, "blamed_fixes");
+    }
+
     my @to = ();
     if ($email || $email_list) {
 	if ($email) {
-- 
cgit v1.2.3


From 290d5388993eb40b9d5632aefb864cf1012a2bcc Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Sat, 22 Feb 2020 10:00:01 +0100
Subject: scripts: documentation-file-ref-check: improve :doc: handling

There are some issues at the script with regards to :doc:
tags:

- It doesn't escape files under Documentation/sphinx,
  leading to false positives;
- It doesn't handle root URLs, like :doc:`/x86/boot`;
- It doesn't output the file with a bad reference.

Address those things, in order to remove false positives
from the list of problems.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 scripts/documentation-file-ref-check | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/documentation-file-ref-check b/scripts/documentation-file-ref-check
index 7784c54aa38b..997202a18ddb 100755
--- a/scripts/documentation-file-ref-check
+++ b/scripts/documentation-file-ref-check
@@ -51,7 +51,9 @@ open IN, "git grep ':doc:\`' Documentation/|"
      or die "Failed to run git grep";
 while (<IN>) {
 	next if (!m,^([^:]+):.*\:doc\:\`([^\`]+)\`,);
+	next if (m,sphinx/,);
 
+	my $file = $1;
 	my $d = $1;
 	my $doc_ref = $2;
 
@@ -60,7 +62,12 @@ while (<IN>) {
 	$d =~ s,(.*/).*,$1,;
 	$f =~ s,.*\<([^\>]+)\>,$1,;
 
-	$f ="$d$f.rst";
+	if ($f =~ m,^/,) {
+		$f = "$f.rst";
+		$f =~ s,^/,Documentation/,;
+	} else {
+		$f = "$d$f.rst";
+	}
 
 	next if (grep -e, glob("$f"));
 
@@ -69,7 +76,7 @@ while (<IN>) {
 	}
 	$doc_fix++;
 
-	print STDERR "$f: :doc:`$doc_ref`\n";
+	print STDERR "$file: :doc:`$doc_ref`\n";
 }
 close IN;
 
-- 
cgit v1.2.3


From 021622df556b7213cffec1c0713f093fc7d045e3 Mon Sep 17 00:00:00 2001
From: Stephen Kitt <steve@sk2.org>
Date: Wed, 19 Feb 2020 16:34:42 +0100
Subject: docs: add a script to check sysctl docs

This script allows sysctl documentation to be checked against the
kernel source code, to identify missing or obsolete entries. Running
it against 5.5 shows for example that sysctl/kernel.rst has two
obsolete entries and is missing 52 entries.

Signed-off-by: Stephen Kitt <steve@sk2.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/admin-guide/sysctl/kernel.rst |   3 +
 scripts/check-sysctl-docs                   | 181 ++++++++++++++++++++++++++++
 2 files changed, 184 insertions(+)
 create mode 100755 scripts/check-sysctl-docs

(limited to 'scripts')

diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 6586e0e0c11f..1c48ab4bfe30 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -2,6 +2,9 @@
 Documentation for /proc/sys/kernel/
 ===================================
 
+.. See scripts/check-sysctl-docs to keep this up to date
+
+
 Copyright (c) 1998, 1999,  Rik van Riel <riel@nl.linux.org>
 
 Copyright (c) 2009,        Shen Feng<shen@cn.fujitsu.com>
diff --git a/scripts/check-sysctl-docs b/scripts/check-sysctl-docs
new file mode 100755
index 000000000000..8bcb9e26c7bc
--- /dev/null
+++ b/scripts/check-sysctl-docs
@@ -0,0 +1,181 @@
+#!/usr/bin/gawk -f
+# SPDX-License-Identifier: GPL-2.0
+
+# Script to check sysctl documentation against source files
+#
+# Copyright (c) 2020 Stephen Kitt
+
+# Example invocation:
+#	scripts/check-sysctl-docs -vtable="kernel" \
+#		Documentation/admin-guide/sysctl/kernel.rst \
+#		$(git grep -l register_sysctl_)
+#
+# Specify -vdebug=1 to see debugging information
+
+BEGIN {
+    if (!table) {
+	print "Please specify the table to look for using the table variable" > "/dev/stderr"
+	exit 1
+    }
+}
+
+# The following globals are used:
+# children: maps ctl_table names and procnames to child ctl_table names
+# documented: maps documented entries (each key is an entry)
+# entries: maps ctl_table names and procnames to counts (so
+#          enumerating the subkeys for a given ctl_table lists its
+#          procnames)
+# files: maps procnames to source file names
+# paths: maps ctl_path names to paths
+# curpath: the name of the current ctl_path struct
+# curtable: the name of the current ctl_table struct
+# curentry: the name of the current proc entry (procname when parsing
+#           a ctl_table, constructed path when parsing a ctl_path)
+
+
+# Remove punctuation from the given value
+function trimpunct(value) {
+    while (value ~ /^["&]/) {
+	value = substr(value, 2)
+    }
+    while (value ~ /[]["&,}]$/) {
+	value = substr(value, 1, length(value) - 1)
+    }
+    return value
+}
+
+# Print the information for the given entry
+function printentry(entry) {
+    seen[entry]++
+    printf "* %s from %s", entry, file[entry]
+    if (documented[entry]) {
+	printf " (documented)"
+    }
+    print ""
+}
+
+
+# Stage 1: build the list of documented entries
+FNR == NR && /^=+$/ {
+    if (prevline ~ /Documentation for/) {
+	# This is the main title
+	next
+    }
+
+    # The previous line is a section title, parse it
+    $0 = prevline
+    if (debug) print "Parsing " $0
+    inbrackets = 0
+    for (i = 1; i <= NF; i++) {
+	if (length($i) == 0) {
+	    continue
+	}
+	if (!inbrackets && substr($i, 1, 1) == "(") {
+	    inbrackets = 1
+	}
+	if (!inbrackets) {
+	    token = trimpunct($i)
+	    if (length(token) > 0 && token != "and") {
+		if (debug) print trimpunct($i)
+		documented[trimpunct($i)]++
+	    }
+	}
+	if (inbrackets && substr($i, length($i), 1) == ")") {
+	    inbrackets = 0
+	}
+    }
+}
+
+FNR == NR {
+    prevline = $0
+    next
+}
+
+
+# Stage 2: process each file and find all sysctl tables
+BEGINFILE {
+    delete children
+    delete entries
+    delete paths
+    curpath = ""
+    curtable = ""
+    curentry = ""
+    if (debug) print "Processing file " FILENAME
+}
+
+/^static struct ctl_path/ {
+    match($0, /static struct ctl_path ([^][]+)/, tables)
+    curpath = tables[1]
+    if (debug) print "Processing path " curpath
+}
+
+/^static struct ctl_table/ {
+    match($0, /static struct ctl_table ([^][]+)/, tables)
+    curtable = tables[1]
+    if (debug) print "Processing table " curtable
+}
+
+/^};$/ {
+    curpath = ""
+    curtable = ""
+    curentry = ""
+}
+
+curpath && /\.procname[\t ]*=[\t ]*".+"/ {
+    match($0, /.procname[\t ]*=[\t ]*"([^"]+)"/, names)
+    if (curentry) {
+	curentry = curentry "/" names[1]
+    } else {
+	curentry = names[1]
+    }
+    if (debug) print "Setting path " curpath " to " curentry
+    paths[curpath] = curentry
+}
+
+curtable && /\.procname[\t ]*=[\t ]*".+"/ {
+    match($0, /.procname[\t ]*=[\t ]*"([^"]+)"/, names)
+    curentry = names[1]
+    if (debug) print "Adding entry " curentry " to table " curtable
+    entries[curtable][curentry]++
+    file[curentry] = FILENAME
+}
+
+/\.child[\t ]*=/ {
+    child = trimpunct($NF)
+    if (debug) print "Linking child " child " to table " curtable " entry " curentry
+    children[curtable][curentry] = child
+}
+
+/register_sysctl_table\(.*\)/ {
+    match($0, /register_sysctl_table\(([^)]+)\)/, tables)
+    if (debug) print "Registering table " tables[1]
+    if (children[tables[1]][table]) {
+	for (entry in entries[children[tables[1]][table]]) {
+	    printentry(entry)
+	}
+    }
+}
+
+/register_sysctl_paths\(.*\)/ {
+    match($0, /register_sysctl_paths\(([^)]+), ([^)]+)\)/, tables)
+    if (debug) print "Attaching table " tables[2] " to path " tables[1]
+    if (paths[tables[1]] == table) {
+	for (entry in entries[tables[2]]) {
+	    printentry(entry)
+	}
+    }
+    split(paths[tables[1]], components, "/")
+    if (length(components) > 1 && components[1] == table) {
+	# Count the first subdirectory as seen
+	seen[components[2]]++
+    }
+}
+
+
+END {
+    for (entry in documented) {
+	if (!seen[entry]) {
+	    print "No implementation for " entry
+	}
+    }
+}
-- 
cgit v1.2.3


From 3cd046f182aab72b922e35461b204a2b52587946 Mon Sep 17 00:00:00 2001
From: Scott Branden <scott.branden@broadcom.com>
Date: Tue, 25 Feb 2020 12:54:26 -0800
Subject: scripts/bpf: Switch to more portable python3 shebang

Change "/usr/bin/python3" to "/usr/bin/env python3" for
more portable solution in bpf_helpers_doc.py.

Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200225205426.6975-1-scott.branden@broadcom.com
---
 scripts/bpf_helpers_doc.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py
index 90baf7d70911..cebed6fb5bbb 100755
--- a/scripts/bpf_helpers_doc.py
+++ b/scripts/bpf_helpers_doc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0-only
 #
 # Copyright (C) 2018-2019 Netronome Systems, Inc.
-- 
cgit v1.2.3


From 7a04960560640ac5b0b89461f7757322b57d0c7a Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 23 Feb 2020 04:04:31 +0900
Subject: kbuild: fix DT binding schema rule to detect command line changes

This if_change_rule is not working properly; it cannot detect any
command line change.

The reason is because cmd-check in scripts/Kbuild.include compares
$(cmd_$@) and $(cmd_$1), but cmd_dtc_dt_yaml does not exist here.

For if_change_rule to work properly, the stem part of cmd_* and rule_*
must match. Because this cmd_and_fixdep invokes cmd_dtc, this rule must
be named rule_dtc.

Fixes: 4f0e3a57d6eb ("kbuild: Add support for DT binding schema checks")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
---
 scripts/Makefile.lib | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index bae62549e3d2..64b938c10039 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -302,13 +302,13 @@ DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.yaml
 quiet_cmd_dtb_check =	CHECK   $@
       cmd_dtb_check =	$(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ ;
 
-define rule_dtc_dt_yaml
+define rule_dtc
 	$(call cmd_and_fixdep,dtc,yaml)
 	$(call cmd,dtb_check)
 endef
 
 $(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
-	$(call if_changed_rule,dtc_dt_yaml)
+	$(call if_changed_rule,dtc)
 
 dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
-- 
cgit v1.2.3


From fd63fab48f143f73b534821408a303241ed174f9 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 23 Feb 2020 04:04:32 +0900
Subject: kbuild: remove unneeded semicolon at the end of cmd_dtb_check

This trailing semicolon is unneeded.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
---
 scripts/Makefile.lib | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 64b938c10039..752ff0a225a9 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -300,7 +300,7 @@ DT_BINDING_DIR := Documentation/devicetree/bindings
 DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.yaml
 
 quiet_cmd_dtb_check =	CHECK   $@
-      cmd_dtb_check =	$(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ ;
+      cmd_dtb_check =	$(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@
 
 define rule_dtc
 	$(call cmd_and_fixdep,dtc,yaml)
-- 
cgit v1.2.3


From e3e0b582c321aefd72db0e7083a0adfe285e96b5 Mon Sep 17 00:00:00 2001
From: Stephen Smalley <sds@tycho.nsa.gov>
Date: Mon, 24 Feb 2020 11:10:23 -0500
Subject: selinux: remove unused initial SIDs and improve handling

Remove initial SIDs that have never been used or are no longer used by
the kernel from its string table, which is also used to generate the
SECINITSID_* symbols referenced in code.  Update the code to
gracefully handle the fact that these can now be NULL. Stop treating
it as an error if a policy defines additional initial SIDs unknown to
the kernel.  Do not load unused initial SID contexts into the sidtab.
Fix the incorrect usage of the name from the ocontext in error
messages when loading initial SIDs since these are not presently
written to the kernel policy and are therefore always NULL.

After this change, it is possible to safely reclaim and reuse some of
the unused initial SIDs without compatibility issues.  Specifically,
unused initial SIDs that were being assigned the same context as the
unlabeled initial SID in policies can be reclaimed and reused for
another purpose, with existing policies still treating them as having
the unlabeled context and future policies having the option of mapping
them to a more specific context.  For example, this could have been
used when the infiniband labeling support was introduced to define
initial SIDs for the default pkey and endport SIDs similar to the
handling of port/netif/node SIDs rather than always using
SECINITSID_UNLABELED as the default.

The set of safely reclaimable unused initial SIDs across all known
policies is igmp_packet (13), icmp_socket (14), tcp_socket (15), kmod
(24), policy (25), and scmp_packet (26); these initial SIDs were
assigned the same context as unlabeled in all known policies including
mls.  If only considering non-mls policies (i.e. assuming that mls
users always upgrade policy with their kernels), the set of safely
reclaimable unused initial SIDs further includes file_labels (6), init
(7), sysctl_modprobe (16), and sysctl_fs (18) through sysctl_dev (23).

Adding new initial SIDs beyond SECINITSID_NUM to policy unfortunately
became a fatal error in commit 24ed7fdae669 ("selinux: use separate
table for initial SID lookup") and even before that it could cause
problems on a policy reload (collision between the new initial SID and
one allocated at runtime) ever since commit 42596eafdd75 ("selinux:
load the initial SIDs upon every policy load") so we cannot safely
start adding new initial SIDs to policies beyond SECINITSID_NUM (27)
until such a time as all such kernels do not need to be supported and
only those that include this commit are relevant. That is not a big
deal since we haven't added a new initial SID since 2004 (v2.6.7) and
we have plenty of unused ones we can reclaim if we truly need one.

If we want to avoid the wasted storage in initial_sid_to_string[]
and/or sidtab->isids[] for the unused initial SIDs, we could introduce
an indirection between the kernel initial SID values and the policy
initial SID values and just map the policy SID values in the ocontexts
to the kernel values during policy_load_isids(). Originally I thought
we'd do this by preserving the initial SID names in the kernel policy
and creating a mapping at load time like we do for the security
classes and permissions but that would require a new kernel policy
format version and associated changes to libsepol/checkpolicy and I'm
not sure it is justified. Simpler approach is just to create a fixed
mapping table in the kernel from the existing fixed policy values to
the kernel values. Less flexible but probably sufficient.

A separate selinux userspace change was applied in
https://github.com/SELinuxProject/selinux/commit/8677ce5e8f592950ae6f14cea1b68a20ddc1ac25
to enable removal of most of the unused initial SID contexts from
policies, but there is no dependency between that change and this one.
That change permits removing all of the unused initial SID contexts
from policy except for the fs and sysctl SID contexts.  The initial
SID declarations themselves would remain in policy to preserve the
values of subsequent ones but the contexts can be dropped.  If/when
the kernel decides to reuse one of them, future policies can change
the name and start assigning a context again without breaking
compatibility.

Here is how I would envision staging changes to the initial SIDs in a
compatible manner after this commit is applied:

1. At any time after this commit is applied, the kernel could choose
to reclaim one of the safely reclaimable unused initial SIDs listed
above for a new purpose (i.e. replace its NULL entry in the
initial_sid_to_string[] table with a new name and start using the
newly generated SECINITSID_name symbol in code), and refpolicy could
at that time rename its declaration of that initial SID to reflect its
new purpose and start assigning it a context going
forward. Existing/old policies would map the reclaimed initial SID to
the unlabeled context, so that would be the initial default behavior
until policies are updated. This doesn't depend on the selinux
userspace change; it will work with existing policies and userspace.

2. In 6 months or so we'll have another SELinux userspace release that
will include the libsepol/checkpolicy support for omitting unused
initial SID contexts.

3. At any time after that release, refpolicy can make that release its
minimum build requirement and drop the sid context statements (but not
the sid declarations) for all of the unused initial SIDs except for
fs and sysctl, which must remain for compatibility on policy
reload with old kernels and for compatibility with kernels that were
still using SECINITSID_SYSCTL (< 2.6.39). This doesn't depend on this
kernel commit; it will work with previous kernels as well.

4. After N years for some value of N, refpolicy decides that it no
longer cares about policy reload compatibility for kernels that
predate this kernel commit, and refpolicy drops the fs and sysctl
SID contexts from policy too (but retains the declarations).

5. After M years for some value of M, the kernel decides that it no
longer cares about compatibility with refpolicies that predate step 4
(dropping the fs and sysctl SIDs), and those two SIDs also become
safely reclaimable.  This step is optional and need not ever occur unless
we decide that the need to reclaim those two SIDs outweighs the
compatibility cost.

6. After O years for some value of O, refpolicy decides that it no
longer cares about policy load (not just reload) compatibility for
kernels that predate this kernel commit, and both kernel and refpolicy
can then start adding and using new initial SIDs beyond 27. This does
not depend on the previous change (step 5) and can occur independent
of it.

Fixes: https://github.com/SELinuxProject/selinux-kernel/issues/12
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
---
 scripts/selinux/genheaders/genheaders.c          | 11 +++--
 security/selinux/include/initial_sid_to_string.h | 57 ++++++++++++------------
 security/selinux/selinuxfs.c                     |  6 ++-
 security/selinux/ss/policydb.c                   | 25 +++++------
 security/selinux/ss/services.c                   | 26 +++++------
 5 files changed, 66 insertions(+), 59 deletions(-)

(limited to 'scripts')

diff --git a/scripts/selinux/genheaders/genheaders.c b/scripts/selinux/genheaders/genheaders.c
index 544ca126a8a8..f355b3e0e968 100644
--- a/scripts/selinux/genheaders/genheaders.c
+++ b/scripts/selinux/genheaders/genheaders.c
@@ -67,8 +67,12 @@ int main(int argc, char *argv[])
 	}
 
 	isids_len = sizeof(initial_sid_to_string) / sizeof (char *);
-	for (i = 1; i < isids_len; i++)
-		initial_sid_to_string[i] = stoupperx(initial_sid_to_string[i]);
+	for (i = 1; i < isids_len; i++) {
+		const char *s = initial_sid_to_string[i];
+
+		if (s)
+			initial_sid_to_string[i] = stoupperx(s);
+	}
 
 	fprintf(fout, "/* This file is automatically generated.  Do not edit. */\n");
 	fprintf(fout, "#ifndef _SELINUX_FLASK_H_\n#define _SELINUX_FLASK_H_\n\n");
@@ -82,7 +86,8 @@ int main(int argc, char *argv[])
 
 	for (i = 1; i < isids_len; i++) {
 		const char *s = initial_sid_to_string[i];
-		fprintf(fout, "#define SECINITSID_%-39s %2d\n", s, i);
+		if (s)
+			fprintf(fout, "#define SECINITSID_%-39s %2d\n", s, i);
 	}
 	fprintf(fout, "\n#define SECINITSID_NUM %d\n", i-1);
 	fprintf(fout, "\nstatic inline bool security_is_socket_class(u16 kern_tclass)\n");
diff --git a/security/selinux/include/initial_sid_to_string.h b/security/selinux/include/initial_sid_to_string.h
index 4f93f697f71c..5d332aeb8b6c 100644
--- a/security/selinux/include/initial_sid_to_string.h
+++ b/security/selinux/include/initial_sid_to_string.h
@@ -1,34 +1,33 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/* This file is automatically generated.  Do not edit. */
 static const char *initial_sid_to_string[] =
 {
-    "null",
-    "kernel",
-    "security",
-    "unlabeled",
-    "fs",
-    "file",
-    "file_labels",
-    "init",
-    "any_socket",
-    "port",
-    "netif",
-    "netmsg",
-    "node",
-    "igmp_packet",
-    "icmp_socket",
-    "tcp_socket",
-    "sysctl_modprobe",
-    "sysctl",
-    "sysctl_fs",
-    "sysctl_kernel",
-    "sysctl_net",
-    "sysctl_net_unix",
-    "sysctl_vm",
-    "sysctl_dev",
-    "kmod",
-    "policy",
-    "scmp_packet",
-    "devnull",
+	NULL,
+	"kernel",
+	"security",
+	"unlabeled",
+	NULL,
+	"file",
+	NULL,
+	NULL,
+	"any_socket",
+	"port",
+	"netif",
+	"netmsg",
+	"node",
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	"devnull",
 };
 
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 533ab170ad52..4781314c2510 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -1701,7 +1701,11 @@ static int sel_make_initcon_files(struct dentry *dir)
 	for (i = 1; i <= SECINITSID_NUM; i++) {
 		struct inode *inode;
 		struct dentry *dentry;
-		dentry = d_alloc_name(dir, security_get_initial_sid_context(i));
+		const char *s = security_get_initial_sid_context(i);
+
+		if (!s)
+			continue;
+		dentry = d_alloc_name(dir, s);
 		if (!dentry)
 			return -ENOMEM;
 
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 7ca8c74efba3..7739369f5d9a 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -838,29 +838,28 @@ int policydb_load_isids(struct policydb *p, struct sidtab *s)
 
 	head = p->ocontexts[OCON_ISID];
 	for (c = head; c; c = c->next) {
-		rc = -EINVAL;
-		if (!c->context[0].user) {
-			pr_err("SELinux:  SID %s was never defined.\n",
-				c->u.name);
-			sidtab_destroy(s);
-			goto out;
-		}
-		if (c->sid[0] == SECSID_NULL || c->sid[0] > SECINITSID_NUM) {
-			pr_err("SELinux:  Initial SID %s out of range.\n",
-				c->u.name);
+		u32 sid = c->sid[0];
+		const char *name = security_get_initial_sid_context(sid);
+
+		if (sid == SECSID_NULL) {
+			pr_err("SELinux:  SID 0 was assigned a context.\n");
 			sidtab_destroy(s);
 			goto out;
 		}
+
+		/* Ignore initial SIDs unused by this kernel. */
+		if (!name)
+			continue;
+
 		rc = context_add_hash(p, &c->context[0]);
 		if (rc) {
 			sidtab_destroy(s);
 			goto out;
 		}
-
-		rc = sidtab_set_initial(s, c->sid[0], &c->context[0]);
+		rc = sidtab_set_initial(s, sid, &c->context[0]);
 		if (rc) {
 			pr_err("SELinux:  unable to load initial SID %s.\n",
-				c->u.name);
+			       name);
 			sidtab_destroy(s);
 			goto out;
 		}
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index f90e6550eec8..8ad34fd031d1 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1322,23 +1322,22 @@ static int security_sid_to_context_core(struct selinux_state *state,
 	if (!selinux_initialized(state)) {
 		if (sid <= SECINITSID_NUM) {
 			char *scontextp;
+			const char *s = initial_sid_to_string[sid];
 
-			*scontext_len = strlen(initial_sid_to_string[sid]) + 1;
+			if (!s)
+				return -EINVAL;
+			*scontext_len = strlen(s) + 1;
 			if (!scontext)
-				goto out;
-			scontextp = kmemdup(initial_sid_to_string[sid],
-					    *scontext_len, GFP_ATOMIC);
-			if (!scontextp) {
-				rc = -ENOMEM;
-				goto out;
-			}
+				return 0;
+			scontextp = kmemdup(s, *scontext_len, GFP_ATOMIC);
+			if (!scontextp)
+				return -ENOMEM;
 			*scontext = scontextp;
-			goto out;
+			return 0;
 		}
 		pr_err("SELinux: %s:  called before initial "
 		       "load_policy on unknown SID %d\n", __func__, sid);
-		rc = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
 	read_lock(&state->ss->policy_rwlock);
 	policydb = &state->ss->policydb;
@@ -1362,7 +1361,6 @@ static int security_sid_to_context_core(struct selinux_state *state,
 
 out_unlock:
 	read_unlock(&state->ss->policy_rwlock);
-out:
 	return rc;
 
 }
@@ -1552,7 +1550,9 @@ static int security_context_to_sid_core(struct selinux_state *state,
 		int i;
 
 		for (i = 1; i < SECINITSID_NUM; i++) {
-			if (!strcmp(initial_sid_to_string[i], scontext2)) {
+			const char *s = initial_sid_to_string[i];
+
+			if (s && !strcmp(s, scontext2)) {
 				*sid = i;
 				goto out;
 			}
-- 
cgit v1.2.3


From 1ce589ad3933aa15c1a2abbb5b5e3ad5de330423 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Thu, 27 Feb 2020 12:31:08 +0100
Subject: i3c: Generate aliases for i3c modules

This part was missing, thus preventing user space from loading modules
automatically when MODALIAS uevents are received.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Link: https://lore.kernel.org/linux-i3c/79687073b915182e06fccfb18adcedfd0fadbc99.1582796652.git.vitor.soares@synopsys.com
---
 scripts/mod/devicetable-offsets.c |  7 +++++++
 scripts/mod/file2alias.c          | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+)

(limited to 'scripts')

diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index 054405b90ba4..d3c237b9b7c0 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -145,6 +145,13 @@ int main(void)
 	DEVID(i2c_device_id);
 	DEVID_FIELD(i2c_device_id, name);
 
+	DEVID(i3c_device_id);
+	DEVID_FIELD(i3c_device_id, match_flags);
+	DEVID_FIELD(i3c_device_id, dcr);
+	DEVID_FIELD(i3c_device_id, manuf_id);
+	DEVID_FIELD(i3c_device_id, part_id);
+	DEVID_FIELD(i3c_device_id, extra_info);
+
 	DEVID(spi_device_id);
 	DEVID_FIELD(spi_device_id, name);
 
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index c91eba751804..f81cbe021a47 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -919,6 +919,24 @@ static int do_i2c_entry(const char *filename, void *symval,
 	return 1;
 }
 
+static int do_i3c_entry(const char *filename, void *symval,
+			char *alias)
+{
+	DEF_FIELD(symval, i3c_device_id, match_flags);
+	DEF_FIELD(symval, i3c_device_id, dcr);
+	DEF_FIELD(symval, i3c_device_id, manuf_id);
+	DEF_FIELD(symval, i3c_device_id, part_id);
+	DEF_FIELD(symval, i3c_device_id, extra_info);
+
+	strcpy(alias, "i3c:");
+	ADD(alias, "dcr", match_flags & I3C_MATCH_DCR, dcr);
+	ADD(alias, "manuf", match_flags & I3C_MATCH_MANUF, manuf_id);
+	ADD(alias, "part", match_flags & I3C_MATCH_PART, part_id);
+	ADD(alias, "ext", match_flags & I3C_MATCH_EXTRA_INFO, extra_info);
+
+	return 1;
+}
+
 /* Looks like: spi:S */
 static int do_spi_entry(const char *filename, void *symval,
 			char *alias)
@@ -1386,6 +1404,7 @@ static const struct devtable devtable[] = {
 	{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
 	{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
 	{"i2c", SIZE_i2c_device_id, do_i2c_entry},
+	{"i3c", SIZE_i3c_device_id, do_i3c_entry},
 	{"spi", SIZE_spi_device_id, do_spi_entry},
 	{"dmi", SIZE_dmi_system_id, do_dmi_entry},
 	{"platform", SIZE_platform_device_id, do_platform_entry},
-- 
cgit v1.2.3


From f84fdf8df1c15f1e66478340bf0da5449f30a0af Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 15 Feb 2020 16:50:20 +0900
Subject: kbuild: remove the owner check in mkcompile_h

This reverts a very old commit, which dates back to the pre-git era:

|commit 5d1cfb5b12f72145d30ba0f53c9f238144b122b8
|Author: Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de>
|Date:   Sat Jul 27 02:53:19 2002 -0500
|
|    kbuild: Fix compiling/installing as different users
|
|    "make bzImage && sudo make install" had the problem that during
|    the "sudo make install" the build system would notice that the information
|    in include/linux/compile.h is not accurate (it says "compiled by <user>",
|    but we are root), thus causing compile.h to be updated and leading to
|    some recompiles.
|
|    We now only update "compile.h" if the current user is the owner of
|    include/linux/autoconf.h, i.e. the user who did the "make *config". So the
|    above sequence will correctly state "compiled by <user>".
|
|diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
|index 6313db96172..cd956380978 100755
|--- a/scripts/mkcompile_h
|+++ b/scripts/mkcompile_h
|@@ -3,6 +3,17 @@ ARCH=$2
| SMP=$3
| CC=$4
|
|+# If compile.h exists already and we don't own autoconf.h
|+# (i.e. we're not the same user who did make *config), don't
|+# modify compile.h
|+# So "sudo make install" won't change the "compiled by <user>"
|+# do "compiled by root"
|+
|+if [ -r $TARGET -a ! -O ../include/linux/autoconf.h ]; then
|+  echo ' (not modified)'
|+  exit 0
|+fi
|+
| if [ -r ../.version ]; then
|   VERSION=`cat ../.version`
| else

The 'make bzImage && sudo make install' problem no longer happens
because commit 1648e4f80506 ("x86, kbuild: make "make install" not
depend on vmlinux") fixed the root cause.

Commit 19514fc665ff ("arm, kbuild: make "make install" not depend on
vmlinux") fixed the similar issue on ARM, with detailed explanation.

So, the rule is that the installation targets should never trigger
the builds of any build artifact. By following it, this check is
unneeded.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/mkcompile_h | 11 -----------
 1 file changed, 11 deletions(-)

(limited to 'scripts')

diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 3a5a4b210c86..3ff26e5b2eac 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -10,17 +10,6 @@ CC=$6
 
 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
 
-# If compile.h exists already and we don't own autoconf.h
-# (i.e. we're not the same user who did make *config), don't
-# modify compile.h
-# So "sudo make install" won't change the "compiled by <user>"
-# do "compiled by root"
-
-if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
-  vecho "  SKIPPED $TARGET"
-  exit 0
-fi
-
 # Do not expand names
 set -f
 
-- 
cgit v1.2.3


From 87d660f08520ccde8569a2202ff346b376011663 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 18 Feb 2020 18:58:59 +0900
Subject: fixdep: remove unneeded code and comments about *.ver files

This is probably stale code. In old days (~ Linux 2.5.59), Kbuild made
genksyms generate include/linux/modules/*.ver files.

The currenct Kbuild does not generate *.ver files at all.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/basic/fixdep.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

(limited to 'scripts')

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 9ba47b0a47b9..ad2041817985 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -77,11 +77,6 @@
  * dependencies on include/config/my/option.h for every
  * CONFIG_MY_OPTION encountered in any of the prerequisites.
  *
- * It will also filter out all the dependencies on *.ver. We need
- * to make sure that the generated version checksum are globally up
- * to date before even starting the recursive build, so it's too late
- * at this point anyway.
- *
  * We don't even try to really parse the header files, but
  * merely grep, i.e. if CONFIG_FOO is mentioned in a comment, it will
  * be picked up as well. It's not a problem with respect to
@@ -299,8 +294,7 @@ static void *read_file(const char *filename)
 static int is_ignored_file(const char *s, int len)
 {
 	return str_ends_with(s, len, "include/generated/autoconf.h") ||
-	       str_ends_with(s, len, "include/generated/autoksyms.h") ||
-	       str_ends_with(s, len, ".ver");
+	       str_ends_with(s, len, "include/generated/autoksyms.h");
 }
 
 /*
-- 
cgit v1.2.3


From 3f9070a67a94a2765e99adf0913c30b683a1b840 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 18 Feb 2020 19:00:31 +0900
Subject: fixdep: remove redundant null character check

If *q is '\0', the condition (isalnum(*q) || *q == '_') is false anyway.

It is redundant to ensure non-zero *q.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/basic/fixdep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index ad2041817985..877ca2c88246 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -246,7 +246,7 @@ static void parse_config_file(const char *p)
 		}
 		p += 7;
 		q = p;
-		while (*q && (isalnum(*q) || *q == '_'))
+		while (isalnum(*q) || *q == '_')
 			q++;
 		if (str_ends_with(p, q - p, "_MODULE"))
 			r = q - 7;
-- 
cgit v1.2.3


From c428cd52282dcc967b2a936d80f1eec4cb80d6d5 Mon Sep 17 00:00:00 2001
From: Tim Bird <tim.bird@sony.com>
Date: Mon, 24 Feb 2020 18:34:41 -0700
Subject: scripts/sphinx-pre-install: add '-p python3' to virtualenv

With Ubuntu 16.04 (and presumably Debian distros of the same age),
the instructions for setting up a python virtual environment should
do so with the python 3 interpreter.  On these older distros, the
default python (and virtualenv command) might be python2 based.

Some of the packages that sphinx relies on are now only available
for python3.  If you don't specify the python3 interpreter for
the virtualenv, you get errors when doing the pip installs for
various packages

Fix this by adding '-p python3' to the virtualenv recommendation
line.

Signed-off-by: Tim Bird <tim.bird@sony.com>
Link: https://lore.kernel.org/r/1582594481-23221-1-git-send-email-tim.bird@sony.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 scripts/sphinx-pre-install | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/sphinx-pre-install b/scripts/sphinx-pre-install
index a8f0c002a340..fa3fb05cd54b 100755
--- a/scripts/sphinx-pre-install
+++ b/scripts/sphinx-pre-install
@@ -701,11 +701,26 @@ sub check_needs()
 		} else {
 			my $rec_activate = "$virtenv_dir/bin/activate";
 			my $virtualenv = findprog("virtualenv-3");
+			my $rec_python3 = "";
 			$virtualenv = findprog("virtualenv-3.5") if (!$virtualenv);
 			$virtualenv = findprog("virtualenv") if (!$virtualenv);
 			$virtualenv = "virtualenv" if (!$virtualenv);
 
-			printf "\t$virtualenv $virtenv_dir\n";
+			my $rel = "";
+			if (index($system_release, "Ubuntu") != -1) {
+				$rel = $1 if ($system_release =~ /Ubuntu\s+(\d+)[.]/);
+				if ($rel && $rel >= 16) {
+					$rec_python3 = " -p python3";
+				}
+			}
+			if (index($system_release, "Debian") != -1) {
+				$rel = $1 if ($system_release =~ /Debian\s+(\d+)/);
+				if ($rel && $rel >= 7) {
+					$rec_python3 = " -p python3";
+				}
+			}
+
+			printf "\t$virtualenv$rec_python3 $virtenv_dir\n";
 			printf "\t. $rec_activate\n";
 			printf "\tpip install -r $requirement_file\n";
 			deactivate_help();
-- 
cgit v1.2.3


From 2a86f6612164a10a3cdb6a499bddf329c4d69f84 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Fri, 28 Feb 2020 12:46:40 +0900
Subject: kbuild: use KBUILD_DEFCONFIG as the fallback for DEFCONFIG_LIST

Most of the Kconfig commands (except defconfig and all*config) read
the .config file as a base set of CONFIG options.

When it does not exist, the files in DEFCONFIG_LIST are searched in
this order and loaded if found.

I do not see much sense in the last two lines in DEFCONFIG_LIST.

[1] ARCH_DEFCONFIG

The entry for DEFCONFIG_LIST is guarded by 'depends on !UML'. So, the
ARCH_DEFCONFIG definition in arch/x86/um/Kconfig is meaningless.

arch/{sh,sparc,x86}/Kconfig define ARCH_DEFCONFIG depending on 32 or
64 bit variant symbols. This is a little bit strange; ARCH_DEFCONFIG
should be a fixed string because the base config file is loaded before
the symbol evaluation stage.

Using KBUILD_DEFCONFIG makes more sense because it is fixed before
Kconfig is invoked. Fortunately, arch/{sh,sparc,x86}/Makefile define it
in the same way, and it works as expected. Hence, replace ARCH_DEFCONFIG
with "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)".

[2] arch/$(ARCH)/defconfig

This file path is no longer valid. The defconfig files are always located
in the arch configs/ directories.

  $ find arch -name defconfig | sort
  arch/alpha/configs/defconfig
  arch/arm64/configs/defconfig
  arch/csky/configs/defconfig
  arch/nds32/configs/defconfig
  arch/riscv/configs/defconfig
  arch/s390/configs/defconfig
  arch/unicore32/configs/defconfig

The path arch/*/configs/defconfig is already covered by
"arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)". So, this file path is
not necessary.

I moved the default KBUILD_DEFCONFIG to the top Makefile. Otherwise,
the 7 architectures listed above would end up with endless loop of
syncconfig.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Makefile                 | 3 +++
 arch/sh/Kconfig          | 5 -----
 arch/sparc/Kconfig       | 5 -----
 arch/x86/Kconfig         | 5 -----
 arch/x86/um/Kconfig      | 5 -----
 init/Kconfig             | 3 +--
 scripts/kconfig/Makefile | 4 ----
 7 files changed, 4 insertions(+), 26 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index 22bc7cc4b157..5435d11d8276 100644
--- a/Makefile
+++ b/Makefile
@@ -388,6 +388,9 @@ endif
 KCONFIG_CONFIG	?= .config
 export KCONFIG_CONFIG
 
+# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
+export KBUILD_DEFCONFIG := defconfig
+
 # SHELL used by kbuild
 CONFIG_SHELL := sh
 
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 9ece111b0254..b4f0e37b83eb 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -87,11 +87,6 @@ config SUPERH64
 	select HAVE_EXIT_THREAD
 	select KALLSYMS
 
-config ARCH_DEFCONFIG
-	string
-	default "arch/sh/configs/shx3_defconfig" if SUPERH32
-	default "arch/sh/configs/cayman_defconfig" if SUPERH64
-
 config GENERIC_BUG
 	def_bool y
 	depends on BUG && SUPERH32
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index c1dd6dd642f4..0de15380d1fc 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -95,11 +95,6 @@ config SPARC64
 	select PCI_DOMAINS if PCI
 	select ARCH_HAS_GIGANTIC_PAGE
 
-config ARCH_DEFCONFIG
-	string
-	default "arch/sparc/configs/sparc32_defconfig" if SPARC32
-	default "arch/sparc/configs/sparc64_defconfig" if SPARC64
-
 config ARCH_PROC_KCORE_TEXT
 	def_bool y
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index beea77046f9b..98935f4387f9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -240,11 +240,6 @@ config OUTPUT_FORMAT
 	default "elf32-i386" if X86_32
 	default "elf64-x86-64" if X86_64
 
-config ARCH_DEFCONFIG
-	string
-	default "arch/x86/configs/i386_defconfig" if X86_32
-	default "arch/x86/configs/x86_64_defconfig" if X86_64
-
 config LOCKDEP_SUPPORT
 	def_bool y
 
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index a8985e1f7432..95d26a69088b 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -27,11 +27,6 @@ config X86_64
 	def_bool 64BIT
 	select MODULES_USE_ELF_RELA
 
-config ARCH_DEFCONFIG
-	string
-	default "arch/um/configs/i386_defconfig" if X86_32
-	default "arch/um/configs/x86_64_defconfig" if X86_64
-
 config 3_LEVEL_PGTABLES
 	bool "Three-level pagetables" if !64BIT
 	default 64BIT
diff --git a/init/Kconfig b/init/Kconfig
index 20a6ac33761c..240c1ed15c69 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -6,8 +6,7 @@ config DEFCONFIG_LIST
 	default "/lib/modules/$(shell,uname -r)/.config"
 	default "/etc/kernel-config"
 	default "/boot/config-$(shell,uname -r)"
-	default ARCH_DEFCONFIG
-	default "arch/$(ARCH)/defconfig"
+	default "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)"
 
 config CC_IS_GCC
 	def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 5887ceb6229e..c9d0a4a8efb3 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -12,10 +12,6 @@ else
 Kconfig := Kconfig
 endif
 
-ifndef KBUILD_DEFCONFIG
-KBUILD_DEFCONFIG := defconfig
-endif
-
 ifeq ($(quiet),silent_)
 silent := -s
 endif
-- 
cgit v1.2.3


From 1518c633df78185f5cbd7322b52ef06358febac3 Mon Sep 17 00:00:00 2001
From: Quentin Perret <qperret@google.com>
Date: Fri, 28 Feb 2020 17:20:13 +0000
Subject: kbuild: allow symbol whitelisting with TRIM_UNUSED_KSYMS

CONFIG_TRIM_UNUSED_KSYMS currently removes all unused exported symbols
from ksymtab. This works really well when using in-tree drivers, but
cannot be used in its current form if some of them are out-of-tree.

Indeed, even if the list of symbols required by out-of-tree drivers is
known at compile time, the only solution today to guarantee these don't
get trimmed is to set CONFIG_TRIM_UNUSED_KSYMS=n. This not only wastes
space, but also makes it difficult to control the ABI usable by vendor
modules in distribution kernels such as Android. Being able to control
the kernel ABI surface is particularly useful to ship a unique Generic
Kernel Image (GKI) for all vendors, which is a first step in the
direction of getting all vendors to contribute their code upstream.

As such, attempt to improve the situation by enabling users to specify a
symbol 'whitelist' at compile time. Any symbol specified in this
whitelist will be kept exported when CONFIG_TRIM_UNUSED_KSYMS is set,
even if it has no in-tree user. The whitelist is defined as a simple
text file, listing symbols, one per line.

Acked-by: Jessica Yu <jeyu@kernel.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Tested-by: Matthias Maennich <maennich@google.com>
Reviewed-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 init/Kconfig                | 13 +++++++++++++
 scripts/adjust_autoksyms.sh | 12 ++++++++++++
 2 files changed, 25 insertions(+)

(limited to 'scripts')

diff --git a/init/Kconfig b/init/Kconfig
index 240c1ed15c69..9f2f10cfb097 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -2207,6 +2207,19 @@ config TRIM_UNUSED_KSYMS
 
 	  If unsure, or if you need to build out-of-tree modules, say N.
 
+config UNUSED_KSYMS_WHITELIST
+	string "Whitelist of symbols to keep in ksymtab"
+	depends on TRIM_UNUSED_KSYMS
+	help
+	  By default, all unused exported symbols will be un-exported from the
+	  build when TRIM_UNUSED_KSYMS is selected.
+
+	  UNUSED_KSYMS_WHITELIST allows to whitelist symbols that must be kept
+	  exported at all times, even in absence of in-tree users. The value to
+	  set here is the path to a text file containing the list of symbols,
+	  one per line. The path can be absolute, or relative to the kernel
+	  source tree.
+
 endif # MODULES
 
 config MODULES_TREE_LOOKUP
diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index a904bf1f5e67..212ba45595d3 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -38,6 +38,17 @@ esac
 # We need access to CONFIG_ symbols
 . include/config/auto.conf
 
+ksym_wl=/dev/null
+if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
+	# Use 'eval' to expand the whitelist path and check if it is relative
+	eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
+	[ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
+	if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
+		echo "ERROR: '$ksym_wl' whitelist file not found" >&2
+		exit 1
+	fi
+fi
+
 # Generate a new ksym list file with symbols needed by the current
 # set of modules.
 cat > "$new_ksyms_file" << EOT
@@ -48,6 +59,7 @@ cat > "$new_ksyms_file" << EOT
 EOT
 sed 's/ko$/mod/' modules.order |
 xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
+cat - "$ksym_wl" |
 sort -u |
 sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$new_ksyms_file"
 
-- 
cgit v1.2.3


From cd195bc4775a5c07620bbb6fc19c4fa254b62b19 Mon Sep 17 00:00:00 2001
From: Quentin Perret <qperret@google.com>
Date: Fri, 28 Feb 2020 17:20:14 +0000
Subject: kbuild: split adjust_autoksyms.sh in two parts

In order to prepare the ground for a build-time optimization, split
adjust_autoksyms.sh into two scripts: one that generates autoksyms.h
based on all currently available information (whitelist, and .mod
files), and the other to inspect the diff between two versions of
autoksyms.h and trigger appropriate rebuilds.

Acked-by: Nicolas Pitre <nico@fluxnic.net>
Tested-by: Matthias Maennich <maennich@google.com>
Reviewed-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/adjust_autoksyms.sh | 36 ++++----------------------------
 scripts/gen_autoksyms.sh    | 51 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 55 insertions(+), 32 deletions(-)
 create mode 100755 scripts/gen_autoksyms.sh

(limited to 'scripts')

diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index 212ba45595d3..2b366d945ccb 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -1,14 +1,13 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0-only
 
-# Script to create/update include/generated/autoksyms.h and dependency files
+# Script to update include/generated/autoksyms.h and dependency files
 #
 # Copyright:	(C) 2016  Linaro Limited
 # Created by:	Nicolas Pitre, January 2016
 #
 
-# Create/update the include/generated/autoksyms.h file from the list
-# of all module's needed symbols as recorded on the second line of *.mod files.
+# Update the include/generated/autoksyms.h file.
 #
 # For each symbol being added or removed, the corresponding dependency
 # file's timestamp is updated to force a rebuild of the affected source
@@ -38,35 +37,8 @@ esac
 # We need access to CONFIG_ symbols
 . include/config/auto.conf
 
-ksym_wl=/dev/null
-if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
-	# Use 'eval' to expand the whitelist path and check if it is relative
-	eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
-	[ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
-	if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
-		echo "ERROR: '$ksym_wl' whitelist file not found" >&2
-		exit 1
-	fi
-fi
-
-# Generate a new ksym list file with symbols needed by the current
-# set of modules.
-cat > "$new_ksyms_file" << EOT
-/*
- * Automatically generated file; DO NOT EDIT.
- */
-
-EOT
-sed 's/ko$/mod/' modules.order |
-xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
-cat - "$ksym_wl" |
-sort -u |
-sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$new_ksyms_file"
-
-# Special case for modversions (see modpost.c)
-if [ -n "$CONFIG_MODVERSIONS" ]; then
-	echo "#define __KSYM_module_layout 1" >> "$new_ksyms_file"
-fi
+# Generate a new symbol list file
+$CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh "$new_ksyms_file"
 
 # Extract changes between old and new list and touch corresponding
 # dependency files.
diff --git a/scripts/gen_autoksyms.sh b/scripts/gen_autoksyms.sh
new file mode 100755
index 000000000000..ef46200c366b
--- /dev/null
+++ b/scripts/gen_autoksyms.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+
+# Create an autoksyms.h header file from the list of all module's needed symbols
+# as recorded on the second line of *.mod files and the user-provided symbol
+# whitelist.
+
+set -e
+
+output_file="$1"
+
+# Use "make V=1" to debug this script.
+case "$KBUILD_VERBOSE" in
+*1*)
+	set -x
+	;;
+esac
+
+# We need access to CONFIG_ symbols
+. include/config/auto.conf
+
+ksym_wl=/dev/null
+if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
+	# Use 'eval' to expand the whitelist path and check if it is relative
+	eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
+	[ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
+	if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
+		echo "ERROR: '$ksym_wl' whitelist file not found" >&2
+		exit 1
+	fi
+fi
+
+# Generate a new ksym list file with symbols needed by the current
+# set of modules.
+cat > "$output_file" << EOT
+/*
+ * Automatically generated file; DO NOT EDIT.
+ */
+
+EOT
+
+sed 's/ko$/mod/' modules.order |
+xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
+cat - "$ksym_wl" |
+sort -u |
+sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"
+
+# Special case for modversions (see modpost.c)
+if [ -n "$CONFIG_MODVERSIONS" ]; then
+	echo "#define __KSYM_module_layout 1" >> "$output_file"
+fi
-- 
cgit v1.2.3


From 88694cff4952dba60227f421884ff4140d296900 Mon Sep 17 00:00:00 2001
From: Quentin Perret <qperret@google.com>
Date: Fri, 28 Feb 2020 17:20:15 +0000
Subject: kbuild: generate autoksyms.h early

When doing a cold build, autoksyms.h starts empty, and is updated late
in the build process to have visibility over the symbols used by in-tree
drivers. But since the symbol whitelist is known upfront, it can be used
to pre-populate autoksyms.h and maximize the amount of code that can be
compiled to its final state in a single pass, hence reducing build time.

Do this by using gen_autoksyms.sh to initialize autoksyms.h instead of
creating an empty file.

Acked-by: Nicolas Pitre <nico@fluxnic.net>
Tested-by: Matthias Maennich <maennich@google.com>
Reviewed-by: Matthias Maennich <maennich@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Makefile                 | 7 +++++--
 scripts/gen_autoksyms.sh | 3 ++-
 2 files changed, 7 insertions(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index 5435d11d8276..f8b70cf80d79 100644
--- a/Makefile
+++ b/Makefile
@@ -1066,9 +1066,12 @@ endif
 
 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
 
+quiet_cmd_autoksyms_h = GEN     $@
+      cmd_autoksyms_h = mkdir -p $(dir $@); \
+			$(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
+
 $(autoksyms_h):
-	$(Q)mkdir -p $(dir $@)
-	$(Q)touch $@
+	$(call cmd,autoksyms_h)
 
 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
 
diff --git a/scripts/gen_autoksyms.sh b/scripts/gen_autoksyms.sh
index ef46200c366b..16c0b2ddaa4c 100755
--- a/scripts/gen_autoksyms.sh
+++ b/scripts/gen_autoksyms.sh
@@ -39,7 +39,8 @@ cat > "$output_file" << EOT
 
 EOT
 
-sed 's/ko$/mod/' modules.order |
+[ -f modules.order ] && modlist=modules.order || modlist=/dev/null
+sed 's/ko$/mod/' $modlist |
 xargs -n1 sed -n -e '2{s/ /\n/g;/^$/!p;}' -- |
 cat - "$ksym_wl" |
 sort -u |
-- 
cgit v1.2.3


From 2ba06cd8565b5b3dee33a9ca24cf86a906d051d1 Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Fri, 28 Feb 2020 18:37:30 -0600
Subject: kbuild: Always validate DT binding examples

Most folks only run dt_binding_check on the single schema they care about
by setting DT_SCHEMA_FILES. That means example is only checked against
that one schema which is not always sufficient.

Let's address this by splitting processed-schema.yaml into 2 files: one
that's always all schemas for the examples and one that's just the schema
in DT_SCHEMA_FILES for dtbs.

Co-developed-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Documentation/devicetree/bindings/.gitignore |  2 +-
 Documentation/devicetree/bindings/Makefile   | 22 ++++++++++++++--------
 scripts/Makefile.lib                         |  3 ++-
 3 files changed, 17 insertions(+), 10 deletions(-)

(limited to 'scripts')

diff --git a/Documentation/devicetree/bindings/.gitignore b/Documentation/devicetree/bindings/.gitignore
index ef82fcfcccab..57afa1533a5f 100644
--- a/Documentation/devicetree/bindings/.gitignore
+++ b/Documentation/devicetree/bindings/.gitignore
@@ -1,2 +1,2 @@
 *.example.dts
-processed-schema.yaml
+processed-schema*.yaml
diff --git a/Documentation/devicetree/bindings/Makefile b/Documentation/devicetree/bindings/Makefile
index 646cb3525373..7c40d5ba1b51 100644
--- a/Documentation/devicetree/bindings/Makefile
+++ b/Documentation/devicetree/bindings/Makefile
@@ -2,7 +2,6 @@
 DT_DOC_CHECKER ?= dt-doc-validate
 DT_EXTRACT_EX ?= dt-extract-example
 DT_MK_SCHEMA ?= dt-mk-schema
-DT_MK_SCHEMA_FLAGS := $(if $(DT_SCHEMA_FILES), -u)
 
 quiet_cmd_chk_binding = CHKDT   $(patsubst $(srctree)/%,%,$<)
       cmd_chk_binding = $(DT_DOC_CHECKER) -u $(srctree)/$(src) $< ; \
@@ -11,26 +10,33 @@ quiet_cmd_chk_binding = CHKDT   $(patsubst $(srctree)/%,%,$<)
 $(obj)/%.example.dts: $(src)/%.yaml FORCE
 	$(call if_changed,chk_binding)
 
-DT_TMP_SCHEMA := processed-schema.yaml
+# Use full schemas when checking %.example.dts
+DT_TMP_SCHEMA := $(obj)/processed-schema-examples.yaml
 
 quiet_cmd_mk_schema = SCHEMA  $@
       cmd_mk_schema = $(DT_MK_SCHEMA) $(DT_MK_SCHEMA_FLAGS) -o $@ $(real-prereqs)
 
-DT_DOCS = $(shell \
+DT_DOCS = $(addprefix $(src)/, \
+	$(shell \
 	cd $(srctree)/$(src) && \
 	find * \( -name '*.yaml' ! \
-		-name $(DT_TMP_SCHEMA) ! \
+		-name 'processed-schema*' ! \
 		-name '*.example.dt.yaml' \) \
-	)
+	))
 
-DT_SCHEMA_FILES ?= $(addprefix $(src)/,$(DT_DOCS))
+DT_SCHEMA_FILES ?= $(DT_DOCS)
 
 ifeq ($(CHECK_DTBS),)
 extra-y += $(patsubst $(src)/%.yaml,%.example.dts, $(DT_SCHEMA_FILES))
 extra-y += $(patsubst $(src)/%.yaml,%.example.dt.yaml, $(DT_SCHEMA_FILES))
+extra-y += processed-schema-examples.yaml
+
+$(obj)/processed-schema-examples.yaml: $(DT_DOCS) FORCE
+	$(call if_changed,mk_schema)
 endif
 
-$(obj)/$(DT_TMP_SCHEMA): $(DT_SCHEMA_FILES) FORCE
+$(obj)/processed-schema.yaml: DT_MK_SCHEMA_FLAGS := -u
+$(obj)/processed-schema.yaml: $(DT_SCHEMA_FILES) FORCE
 	$(call if_changed,mk_schema)
 
-extra-y += $(DT_TMP_SCHEMA)
+extra-y += processed-schema.yaml
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 752ff0a225a9..97547108ee7f 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -297,7 +297,8 @@ $(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE
 
 DT_CHECKER ?= dt-validate
 DT_BINDING_DIR := Documentation/devicetree/bindings
-DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.yaml
+# DT_TMP_SCHEMA may be overridden from Documentation/devicetree/bindings/Makefile
+DT_TMP_SCHEMA ?= $(objtree)/$(DT_BINDING_DIR)/processed-schema.yaml
 
 quiet_cmd_dtb_check =	CHECK   $@
       cmd_dtb_check =	$(DT_CHECKER) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@
-- 
cgit v1.2.3


From af73d78bd384aa9b8789aa6e7ddbb165f971276f Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Tue, 3 Mar 2020 18:18:34 -0800
Subject: kbuild: Remove debug info from kallsyms linking

When CONFIG_DEBUG_INFO is enabled, the two kallsyms linking steps spend
time collecting and writing the dwarf sections to the temporary output
files. kallsyms does not need this information, and leaving it off
halves their linking time. This is especially noticeable without
CONFIG_DEBUG_INFO_REDUCED. The BTF linking stage, however, does still
need those details.

Refactor the BTF and kallsyms generation stages slightly for more
regularized temporary names. Skip debug during kallsyms links.
Additionally move "info BTF" to the correct place since commit
8959e39272d6 ("kbuild: Parameterize kallsyms generation and correct
reporting"), which added "info LD ..." to vmlinux_link calls.

For a full debug info build with BTF, my link time goes from 1m06s to
0m54s, saving about 12 seconds, or 18%.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/202003031814.4AEA3351@keescook
---
 scripts/link-vmlinux.sh | 28 +++++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

(limited to 'scripts')

diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index dd484e92752e..ac569e197bfa 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -63,12 +63,18 @@ vmlinux_link()
 	local lds="${objtree}/${KBUILD_LDS}"
 	local output=${1}
 	local objects
+	local strip_debug
 
 	info LD ${output}
 
 	# skip output file argument
 	shift
 
+	# The kallsyms linking does not need debug symbols included.
+	if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then
+		strip_debug=-Wl,--strip-debug
+	fi
+
 	if [ "${SRCARCH}" != "um" ]; then
 		objects="--whole-archive			\
 			${KBUILD_VMLINUX_OBJS}			\
@@ -79,6 +85,7 @@ vmlinux_link()
 			${@}"
 
 		${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}	\
+			${strip_debug#-Wl,}			\
 			-o ${output}				\
 			-T ${lds} ${objects}
 	else
@@ -91,6 +98,7 @@ vmlinux_link()
 			${@}"
 
 		${CC} ${CFLAGS_vmlinux}				\
+			${strip_debug}				\
 			-o ${output}				\
 			-Wl,-T,${lds}				\
 			${objects}				\
@@ -106,6 +114,8 @@ gen_btf()
 {
 	local pahole_ver
 	local bin_arch
+	local bin_format
+	local bin_file
 
 	if ! [ -x "$(command -v ${PAHOLE})" ]; then
 		echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available"
@@ -118,8 +128,9 @@ gen_btf()
 		return 1
 	fi
 
-	info "BTF" ${2}
 	vmlinux_link ${1}
+
+	info "BTF" ${2}
 	LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
 
 	# dump .BTF section into raw binary file to link with final vmlinux
@@ -127,11 +138,12 @@ gen_btf()
 		cut -d, -f1 | cut -d' ' -f2)
 	bin_format=$(LANG=C ${OBJDUMP} -f ${1} | grep 'file format' | \
 		awk '{print $4}')
+	bin_file=.btf.vmlinux.bin
 	${OBJCOPY} --change-section-address .BTF=0 \
 		--set-section-flags .BTF=alloc -O binary \
-		--only-section=.BTF ${1} .btf.vmlinux.bin
+		--only-section=.BTF ${1} $bin_file
 	${OBJCOPY} -I binary -O ${bin_format} -B ${bin_arch} \
-		--rename-section .data=.BTF .btf.vmlinux.bin ${2}
+		--rename-section .data=.BTF $bin_file ${2}
 }
 
 # Create ${2} .o file with all symbols from the ${1} object file
@@ -166,8 +178,8 @@ kallsyms()
 kallsyms_step()
 {
 	kallsymso_prev=${kallsymso}
-	kallsymso=.tmp_kallsyms${1}.o
-	kallsyms_vmlinux=.tmp_vmlinux${1}
+	kallsyms_vmlinux=.tmp_vmlinux.kallsyms${1}
+	kallsymso=${kallsyms_vmlinux}.o
 
 	vmlinux_link ${kallsyms_vmlinux} "${kallsymso_prev}" ${btf_vmlinux_bin_o}
 	kallsyms ${kallsyms_vmlinux} ${kallsymso}
@@ -190,7 +202,6 @@ cleanup()
 {
 	rm -f .btf.*
 	rm -f .tmp_System.map
-	rm -f .tmp_kallsyms*
 	rm -f .tmp_vmlinux*
 	rm -f System.map
 	rm -f vmlinux
@@ -257,9 +268,8 @@ tr '\0' '\n' < modules.builtin.modinfo | sed -n 's/^[[:alnum:]:_]*\.file=//p' |
 
 btf_vmlinux_bin_o=""
 if [ -n "${CONFIG_DEBUG_INFO_BTF}" ]; then
-	if gen_btf .tmp_vmlinux.btf .btf.vmlinux.bin.o ; then
-		btf_vmlinux_bin_o=.btf.vmlinux.bin.o
-	else
+	btf_vmlinux_bin_o=.btf.vmlinux.bin.o
+	if ! gen_btf .tmp_vmlinux.btf $btf_vmlinux_bin_o ; then
 		echo >&2 "Failed to generate BTF for vmlinux"
 		echo >&2 "Try to disable CONFIG_DEBUG_INFO_BTF"
 		exit 1
-- 
cgit v1.2.3


From 611d61f9ac99dc9e1494473fb90117a960a89dfa Mon Sep 17 00:00:00 2001
From: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Date: Fri, 6 Mar 2020 23:13:11 +0100
Subject: parse-maintainers: Mark as executable
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This makes the script more convenient to run.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/parse-maintainers.pl | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 mode change 100644 => 100755 scripts/parse-maintainers.pl

(limited to 'scripts')

diff --git a/scripts/parse-maintainers.pl b/scripts/parse-maintainers.pl
old mode 100644
new mode 100755
-- 
cgit v1.2.3


From 2b4cbd5c950525b6d4d2cd384dcefdd95fedabe3 Mon Sep 17 00:00:00 2001
From: Jonathan Corbet <corbet@lwn.net>
Date: Mon, 2 Mar 2020 15:24:04 -0700
Subject: docs: move gcc-plugins to the kbuild manual

Information about GCC plugins is relevant to kernel building, so move this
document to the kbuild manual.

Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/core-api/gcc-plugins.rst | 97 ----------------------------------
 Documentation/core-api/index.rst       |  1 -
 Documentation/kbuild/gcc-plugins.rst   | 97 ++++++++++++++++++++++++++++++++++
 Documentation/kbuild/index.rst         |  1 +
 MAINTAINERS                            |  2 +-
 scripts/gcc-plugins/Kconfig            |  2 +-
 6 files changed, 100 insertions(+), 100 deletions(-)
 delete mode 100644 Documentation/core-api/gcc-plugins.rst
 create mode 100644 Documentation/kbuild/gcc-plugins.rst

(limited to 'scripts')

diff --git a/Documentation/core-api/gcc-plugins.rst b/Documentation/core-api/gcc-plugins.rst
deleted file mode 100644
index 4b1c10f88e30..000000000000
--- a/Documentation/core-api/gcc-plugins.rst
+++ /dev/null
@@ -1,97 +0,0 @@
-=========================
-GCC plugin infrastructure
-=========================
-
-
-Introduction
-============
-
-GCC plugins are loadable modules that provide extra features to the
-compiler [1]_. They are useful for runtime instrumentation and static analysis.
-We can analyse, change and add further code during compilation via
-callbacks [2]_, GIMPLE [3]_, IPA [4]_ and RTL passes [5]_.
-
-The GCC plugin infrastructure of the kernel supports all gcc versions from
-4.5 to 6.0, building out-of-tree modules, cross-compilation and building in a
-separate directory.
-Plugin source files have to be compilable by both a C and a C++ compiler as well
-because gcc versions 4.5 and 4.6 are compiled by a C compiler,
-gcc-4.7 can be compiled by a C or a C++ compiler,
-and versions 4.8+ can only be compiled by a C++ compiler.
-
-Currently the GCC plugin infrastructure supports only the x86, arm, arm64 and
-powerpc architectures.
-
-This infrastructure was ported from grsecurity [6]_ and PaX [7]_.
-
---
-
-.. [1] https://gcc.gnu.org/onlinedocs/gccint/Plugins.html
-.. [2] https://gcc.gnu.org/onlinedocs/gccint/Plugin-API.html#Plugin-API
-.. [3] https://gcc.gnu.org/onlinedocs/gccint/GIMPLE.html
-.. [4] https://gcc.gnu.org/onlinedocs/gccint/IPA.html
-.. [5] https://gcc.gnu.org/onlinedocs/gccint/RTL.html
-.. [6] https://grsecurity.net/
-.. [7] https://pax.grsecurity.net/
-
-
-Files
-=====
-
-**$(src)/scripts/gcc-plugins**
-
-	This is the directory of the GCC plugins.
-
-**$(src)/scripts/gcc-plugins/gcc-common.h**
-
-	This is a compatibility header for GCC plugins.
-	It should be always included instead of individual gcc headers.
-
-**$(src)/scripts/gcc-plugin.sh**
-
-	This script checks the availability of the included headers in
-	gcc-common.h and chooses the proper host compiler to build the plugins
-	(gcc-4.7 can be built by either gcc or g++).
-
-**$(src)/scripts/gcc-plugins/gcc-generate-gimple-pass.h,
-$(src)/scripts/gcc-plugins/gcc-generate-ipa-pass.h,
-$(src)/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h,
-$(src)/scripts/gcc-plugins/gcc-generate-rtl-pass.h**
-
-	These headers automatically generate the registration structures for
-	GIMPLE, SIMPLE_IPA, IPA and RTL passes. They support all gcc versions
-	from 4.5 to 6.0.
-	They should be preferred to creating the structures by hand.
-
-
-Usage
-=====
-
-You must install the gcc plugin headers for your gcc version,
-e.g., on Ubuntu for gcc-4.9::
-
-	apt-get install gcc-4.9-plugin-dev
-
-Or on Fedora::
-
-	dnf install gcc-plugin-devel
-
-Enable a GCC plugin based feature in the kernel config::
-
-	CONFIG_GCC_PLUGIN_CYC_COMPLEXITY = y
-
-To compile only the plugin(s)::
-
-	make gcc-plugins
-
-or just run the kernel make and compile the whole kernel with
-the cyclomatic complexity GCC plugin.
-
-
-4. How to add a new GCC plugin
-==============================
-
-The GCC plugins are in $(src)/scripts/gcc-plugins/. You can use a file or a directory
-here. It must be added to $(src)/scripts/gcc-plugins/Makefile,
-$(src)/scripts/Makefile.gcc-plugins and $(src)/arch/Kconfig.
-See the cyc_complexity_plugin.c (CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) GCC plugin.
diff --git a/Documentation/core-api/index.rst b/Documentation/core-api/index.rst
index b39dae276b57..9836a0ac09a3 100644
--- a/Documentation/core-api/index.rst
+++ b/Documentation/core-api/index.rst
@@ -102,7 +102,6 @@ Documents that don't fit elsewhere or which have yet to be categorized.
    :maxdepth: 1
 
    librs
-   gcc-plugins
    ioctl
 
 .. only:: subproject and html
diff --git a/Documentation/kbuild/gcc-plugins.rst b/Documentation/kbuild/gcc-plugins.rst
new file mode 100644
index 000000000000..4b1c10f88e30
--- /dev/null
+++ b/Documentation/kbuild/gcc-plugins.rst
@@ -0,0 +1,97 @@
+=========================
+GCC plugin infrastructure
+=========================
+
+
+Introduction
+============
+
+GCC plugins are loadable modules that provide extra features to the
+compiler [1]_. They are useful for runtime instrumentation and static analysis.
+We can analyse, change and add further code during compilation via
+callbacks [2]_, GIMPLE [3]_, IPA [4]_ and RTL passes [5]_.
+
+The GCC plugin infrastructure of the kernel supports all gcc versions from
+4.5 to 6.0, building out-of-tree modules, cross-compilation and building in a
+separate directory.
+Plugin source files have to be compilable by both a C and a C++ compiler as well
+because gcc versions 4.5 and 4.6 are compiled by a C compiler,
+gcc-4.7 can be compiled by a C or a C++ compiler,
+and versions 4.8+ can only be compiled by a C++ compiler.
+
+Currently the GCC plugin infrastructure supports only the x86, arm, arm64 and
+powerpc architectures.
+
+This infrastructure was ported from grsecurity [6]_ and PaX [7]_.
+
+--
+
+.. [1] https://gcc.gnu.org/onlinedocs/gccint/Plugins.html
+.. [2] https://gcc.gnu.org/onlinedocs/gccint/Plugin-API.html#Plugin-API
+.. [3] https://gcc.gnu.org/onlinedocs/gccint/GIMPLE.html
+.. [4] https://gcc.gnu.org/onlinedocs/gccint/IPA.html
+.. [5] https://gcc.gnu.org/onlinedocs/gccint/RTL.html
+.. [6] https://grsecurity.net/
+.. [7] https://pax.grsecurity.net/
+
+
+Files
+=====
+
+**$(src)/scripts/gcc-plugins**
+
+	This is the directory of the GCC plugins.
+
+**$(src)/scripts/gcc-plugins/gcc-common.h**
+
+	This is a compatibility header for GCC plugins.
+	It should be always included instead of individual gcc headers.
+
+**$(src)/scripts/gcc-plugin.sh**
+
+	This script checks the availability of the included headers in
+	gcc-common.h and chooses the proper host compiler to build the plugins
+	(gcc-4.7 can be built by either gcc or g++).
+
+**$(src)/scripts/gcc-plugins/gcc-generate-gimple-pass.h,
+$(src)/scripts/gcc-plugins/gcc-generate-ipa-pass.h,
+$(src)/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h,
+$(src)/scripts/gcc-plugins/gcc-generate-rtl-pass.h**
+
+	These headers automatically generate the registration structures for
+	GIMPLE, SIMPLE_IPA, IPA and RTL passes. They support all gcc versions
+	from 4.5 to 6.0.
+	They should be preferred to creating the structures by hand.
+
+
+Usage
+=====
+
+You must install the gcc plugin headers for your gcc version,
+e.g., on Ubuntu for gcc-4.9::
+
+	apt-get install gcc-4.9-plugin-dev
+
+Or on Fedora::
+
+	dnf install gcc-plugin-devel
+
+Enable a GCC plugin based feature in the kernel config::
+
+	CONFIG_GCC_PLUGIN_CYC_COMPLEXITY = y
+
+To compile only the plugin(s)::
+
+	make gcc-plugins
+
+or just run the kernel make and compile the whole kernel with
+the cyclomatic complexity GCC plugin.
+
+
+4. How to add a new GCC plugin
+==============================
+
+The GCC plugins are in $(src)/scripts/gcc-plugins/. You can use a file or a directory
+here. It must be added to $(src)/scripts/gcc-plugins/Makefile,
+$(src)/scripts/Makefile.gcc-plugins and $(src)/arch/Kconfig.
+See the cyc_complexity_plugin.c (CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) GCC plugin.
diff --git a/Documentation/kbuild/index.rst b/Documentation/kbuild/index.rst
index 0f144fad99a6..82daf2efcb73 100644
--- a/Documentation/kbuild/index.rst
+++ b/Documentation/kbuild/index.rst
@@ -19,6 +19,7 @@ Kernel Build System
 
     issues
     reproducible-builds
+    gcc-plugins
 
 .. only::  subproject and html
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 083fcf1a151c..8c5712079412 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6934,7 +6934,7 @@ S:	Maintained
 F:	scripts/gcc-plugins/
 F:	scripts/gcc-plugin.sh
 F:	scripts/Makefile.gcc-plugins
-F:	Documentation/core-api/gcc-plugins.rst
+F:	Documentation/kbuild/gcc-plugins.rst
 
 GASKET DRIVER FRAMEWORK
 M:	Rob Springer <rspringer@google.com>
diff --git a/scripts/gcc-plugins/Kconfig b/scripts/gcc-plugins/Kconfig
index e3569543bdac..f8ca236d6165 100644
--- a/scripts/gcc-plugins/Kconfig
+++ b/scripts/gcc-plugins/Kconfig
@@ -23,7 +23,7 @@ menuconfig GCC_PLUGINS
 	  GCC plugins are loadable modules that provide extra features to the
 	  compiler. They are useful for runtime instrumentation and static analysis.
 
-	  See Documentation/core-api/gcc-plugins.rst for details.
+	  See Documentation/kbuild/gcc-plugins.rst for details.
 
 if GCC_PLUGINS
 
-- 
cgit v1.2.3


From 8cc4fd73501d9f1370c3eebb70cfe8cc9e24062b Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 10 Mar 2020 19:12:49 +0900
Subject: kconfig: introduce m32-flag and m64-flag

When a compiler supports multiple architectures, some compiler features
can be dependent on the target architecture.

This is typical for Clang, which supports multiple LLVM backends.
Even for GCC, we need to take care of biarch compiler cases.

It is not a problem when we evaluate cc-option in Makefiles because
cc-option is tested against the flag in question + $(KBUILD_CFLAGS).

The cc-option in Kconfig, on the other hand, does not accumulate
tested flags. Due to this simplification, it could potentially test
cc-option against a different target.

At first, Kconfig always evaluated cc-option against the host
architecture.

Since commit e8de12fb7cde ("kbuild: Check for unknown options with
cc-option usage in Kconfig and clang"), in case of cross-compiling
with Clang, the target triple is correctly passed to Kconfig.

The case with biarch GCC (and native build with Clang) is still not
handled properly. We need to pass some flags to specify the target
machine bit.

Due to the design, all the macros in Kconfig are expanded in the
parse stage, where we do not know the target bit size yet.

For example, arch/x86/Kconfig allows a user to toggle CONFIG_64BIT.
If a compiler flag -foo depends on the machine bit, it must be tested
twice, one with -m32 and the other with -m64.

However, -m32/-m64 are not always recognized. So, this commits adds
m64-flag and m32-flag macros. They expand to -m32, -m64, respectively
if supported. Or, they expand to an empty string if unsupported.

The typical usage is like this:

  config FOO
          bool
          default $(cc-option,$(m64-flag) -foo) if 64BIT
          default $(cc-option,$(m32-flag) -foo)

This is clumsy, but there is no elegant way to handle this in the
current static macro expansion.

There was discussion for static functions vs dynamic functions.
The consensus was to go as far as possible with the static functions.
(https://lkml.org/lkml/2018/3/2/22)

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: George Spelvin <lkml@sdf.org>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
---
 scripts/Kconfig.include | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'scripts')

diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index 85334dc8c997..496d11c92c97 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -44,3 +44,10 @@ $(error-if,$(success, $(LD) -v | grep -q gold), gold linker '$(LD)' not supporte
 
 # gcc version including patch level
 gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC))
+
+# machine bit flags
+#  $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise.
+#  $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise.
+cc-option-bit = $(if-success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null,$(1))
+m32-flag := $(cc-option-bit,-m32)
+m64-flag := $(cc-option-bit,-m64)
-- 
cgit v1.2.3


From ce5c5d6503c99eddb1664edc19b46a9a5ab0be17 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Mon, 2 Mar 2020 09:16:04 +0100
Subject: scsi: docs: convert scsi_mid_low_api.txt to ReST

Link: https://lore.kernel.org/r/881e7741dfed5d6f5f73e1dfc2826b200b8604aa.1583136624.git.mchehab+huawei@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 Documentation/scsi/index.rst            |    1 +
 Documentation/scsi/scsi_eh.rst          |    2 +-
 Documentation/scsi/scsi_mid_low_api.rst | 1334 +++++++++++++++++++++++++++++++
 Documentation/scsi/scsi_mid_low_api.txt | 1280 -----------------------------
 scripts/documentation-file-ref-check    |    2 +-
 5 files changed, 1337 insertions(+), 1282 deletions(-)
 create mode 100644 Documentation/scsi/scsi_mid_low_api.rst
 delete mode 100644 Documentation/scsi/scsi_mid_low_api.txt

(limited to 'scripts')

diff --git a/Documentation/scsi/index.rst b/Documentation/scsi/index.rst
index 119280f26da6..48337be1c3f1 100644
--- a/Documentation/scsi/index.rst
+++ b/Documentation/scsi/index.rst
@@ -35,5 +35,6 @@ Linux SCSI Subsystem
    scsi_eh
    scsi_fc_transport
    scsi-generic
+   scsi_mid_low_api
 
    scsi_transport_srp/figures
diff --git a/Documentation/scsi/scsi_eh.rst b/Documentation/scsi/scsi_eh.rst
index 341f22f35056..7d78c2475615 100644
--- a/Documentation/scsi/scsi_eh.rst
+++ b/Documentation/scsi/scsi_eh.rst
@@ -5,7 +5,7 @@ SCSI EH
 =======
 
 This document describes SCSI midlayer error handling infrastructure.
-Please refer to Documentation/scsi/scsi_mid_low_api.txt for more
+Please refer to Documentation/scsi/scsi_mid_low_api.rst for more
 information regarding SCSI midlayer.
 
 .. TABLE OF CONTENTS
diff --git a/Documentation/scsi/scsi_mid_low_api.rst b/Documentation/scsi/scsi_mid_low_api.rst
new file mode 100644
index 000000000000..37ee63b147e9
--- /dev/null
+++ b/Documentation/scsi/scsi_mid_low_api.rst
@@ -0,0 +1,1334 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=============================================
+SCSI mid_level - lower_level driver interface
+=============================================
+
+Introduction
+============
+This document outlines the interface between the Linux SCSI mid level and
+SCSI lower level drivers. Lower level drivers (LLDs) are variously called
+host bus adapter (HBA) drivers and host drivers (HD). A "host" in this
+context is a bridge between a computer IO bus (e.g. PCI or ISA) and a
+single SCSI initiator port on a SCSI transport. An "initiator" port
+(SCSI terminology, see SAM-3 at http://www.t10.org) sends SCSI commands
+to "target" SCSI ports (e.g. disks). There can be many LLDs in a running
+system, but only one per hardware type. Most LLDs can control one or more
+SCSI HBAs. Some HBAs contain multiple hosts.
+
+In some cases the SCSI transport is an external bus that already has
+its own subsystem in Linux (e.g. USB and ieee1394). In such cases the
+SCSI subsystem LLD is a software bridge to the other driver subsystem.
+Examples are the usb-storage driver (found in the drivers/usb/storage
+directory) and the ieee1394/sbp2 driver (found in the drivers/ieee1394
+directory).
+
+For example, the aic7xxx LLD controls Adaptec SCSI parallel interface
+(SPI) controllers based on that company's 7xxx chip series. The aic7xxx
+LLD can be built into the kernel or loaded as a module. There can only be
+one aic7xxx LLD running in a Linux system but it may be controlling many
+HBAs. These HBAs might be either on PCI daughter-boards or built into
+the motherboard (or both). Some aic7xxx based HBAs are dual controllers
+and thus represent two hosts. Like most modern HBAs, each aic7xxx host
+has its own PCI device address. [The one-to-one correspondence between
+a SCSI host and a PCI device is common but not required (e.g. with
+ISA adapters).]
+
+The SCSI mid level isolates an LLD from other layers such as the SCSI
+upper layer drivers and the block layer.
+
+This version of the document roughly matches linux kernel version 2.6.8 .
+
+Documentation
+=============
+There is a SCSI documentation directory within the kernel source tree,
+typically Documentation/scsi . Most documents are in plain
+(i.e. ASCII) text. This file is named scsi_mid_low_api.txt and can be
+found in that directory. A more recent copy of this document may be found
+at http://web.archive.org/web/20070107183357rn_1/sg.torque.net/scsi/.
+Many LLDs are documented there (e.g. aic7xxx.txt). The SCSI mid-level is
+briefly described in scsi.txt which contains a url to a document
+describing the SCSI subsystem in the lk 2.4 series. Two upper level
+drivers have documents in that directory: st.txt (SCSI tape driver) and
+scsi-generic.txt (for the sg driver).
+
+Some documentation (or urls) for LLDs may be found in the C source code
+or in the same directory as the C source code. For example to find a url
+about the USB mass storage driver see the
+/usr/src/linux/drivers/usb/storage directory.
+
+Driver structure
+================
+Traditionally an LLD for the SCSI subsystem has been at least two files in
+the drivers/scsi directory. For example, a driver called "xyz" has a header
+file "xyz.h" and a source file "xyz.c". [Actually there is no good reason
+why this couldn't all be in one file; the header file is superfluous.] Some
+drivers that have been ported to several operating systems have more than
+two files. For example the aic7xxx driver has separate files for generic
+and OS-specific code (e.g. FreeBSD and Linux). Such drivers tend to have
+their own directory under the drivers/scsi directory.
+
+When a new LLD is being added to Linux, the following files (found in the
+drivers/scsi directory) will need some attention: Makefile and Kconfig .
+It is probably best to study how existing LLDs are organized.
+
+As the 2.5 series development kernels evolve into the 2.6 series
+production series, changes are being introduced into this interface. An
+example of this is driver initialization code where there are now 2 models
+available. The older one, similar to what was found in the lk 2.4 series,
+is based on hosts that are detected at HBA driver load time. This will be
+referred to the "passive" initialization model. The newer model allows HBAs
+to be hot plugged (and unplugged) during the lifetime of the LLD and will
+be referred to as the "hotplug" initialization model. The newer model is
+preferred as it can handle both traditional SCSI equipment that is
+permanently connected as well as modern "SCSI" devices (e.g. USB or
+IEEE 1394 connected digital cameras) that are hotplugged. Both
+initialization models are discussed in the following sections.
+
+An LLD interfaces to the SCSI subsystem several ways:
+
+  a) directly invoking functions supplied by the mid level
+  b) passing a set of function pointers to a registration function
+     supplied by the mid level. The mid level will then invoke these
+     functions at some point in the future. The LLD will supply
+     implementations of these functions.
+  c) direct access to instances of well known data structures maintained
+     by the mid level
+
+Those functions in group a) are listed in a section entitled "Mid level
+supplied functions" below.
+
+Those functions in group b) are listed in a section entitled "Interface
+functions" below. Their function pointers are placed in the members of
+"struct scsi_host_template", an instance of which is passed to
+scsi_host_alloc() [#]_.  Those interface functions that the LLD does not
+wish to supply should have NULL placed in the corresponding member of
+struct scsi_host_template.  Defining an instance of struct
+scsi_host_template at file scope will cause NULL to be  placed in function
+pointer members not explicitly initialized.
+
+Those usages in group c) should be handled with care, especially in a
+"hotplug" environment. LLDs should be aware of the lifetime of instances
+that are shared with the mid level and other layers.
+
+All functions defined within an LLD and all data defined at file scope
+should be static. For example the slave_alloc() function in an LLD
+called "xxx" could be defined as
+``static int xxx_slave_alloc(struct scsi_device * sdev) { /* code */ }``
+
+.. [#] the scsi_host_alloc() function is a replacement for the rather vaguely
+       named scsi_register() function in most situations.
+
+
+Hotplug initialization model
+============================
+In this model an LLD controls when SCSI hosts are introduced and removed
+from the SCSI subsystem. Hosts can be introduced as early as driver
+initialization and removed as late as driver shutdown. Typically a driver
+will respond to a sysfs probe() callback that indicates an HBA has been
+detected. After confirming that the new device is one that the LLD wants
+to control, the LLD will initialize the HBA and then register a new host
+with the SCSI mid level.
+
+During LLD initialization the driver should register itself with the
+appropriate IO bus on which it expects to find HBA(s) (e.g. the PCI bus).
+This can probably be done via sysfs. Any driver parameters (especially
+those that are writable after the driver is loaded) could also be
+registered with sysfs at this point. The SCSI mid level first becomes
+aware of an LLD when that LLD registers its first HBA.
+
+At some later time, the LLD becomes aware of an HBA and what follows
+is a typical sequence of calls between the LLD and the mid level.
+This example shows the mid level scanning the newly introduced HBA for 3
+scsi devices of which only the first 2 respond::
+
+	HBA PROBE: assume 2 SCSI devices found in scan
+    LLD                   mid level                    LLD
+    ===-------------------=========--------------------===------
+    scsi_host_alloc()  -->
+    scsi_add_host()  ---->
+    scsi_scan_host()  -------+
+			    |
+			slave_alloc()
+			slave_configure() -->  scsi_change_queue_depth()
+			    |
+			slave_alloc()
+			slave_configure()
+			    |
+			slave_alloc()   ***
+			slave_destroy() ***
+
+
+    *** For scsi devices that the mid level tries to scan but do not
+	respond, a slave_alloc(), slave_destroy() pair is called.
+
+If the LLD wants to adjust the default queue settings, it can invoke
+scsi_change_queue_depth() in its slave_configure() routine.
+
+When an HBA is being removed it could be as part of an orderly shutdown
+associated with the LLD module being unloaded (e.g. with the "rmmod"
+command) or in response to a "hot unplug" indicated by sysfs()'s
+remove() callback being invoked. In either case, the sequence is the
+same::
+
+	    HBA REMOVE: assume 2 SCSI devices attached
+    LLD                      mid level                 LLD
+    ===----------------------=========-----------------===------
+    scsi_remove_host() ---------+
+				|
+			slave_destroy()
+			slave_destroy()
+    scsi_host_put()
+
+It may be useful for a LLD to keep track of struct Scsi_Host instances
+(a pointer is returned by scsi_host_alloc()). Such instances are "owned"
+by the mid-level.  struct Scsi_Host instances are freed from
+scsi_host_put() when the reference count hits zero.
+
+Hot unplugging an HBA that controls a disk which is processing SCSI
+commands on a mounted file system is an interesting situation. Reference
+counting logic is being introduced into the mid level to cope with many
+of the issues involved. See the section on reference counting below.
+
+
+The hotplug concept may be extended to SCSI devices. Currently, when an
+HBA is added, the scsi_scan_host() function causes a scan for SCSI devices
+attached to the HBA's SCSI transport. On newer SCSI transports the HBA
+may become aware of a new SCSI device _after_ the scan has completed.
+An LLD can use this sequence to make the mid level aware of a SCSI device::
+
+		    SCSI DEVICE hotplug
+    LLD                   mid level                    LLD
+    ===-------------------=========--------------------===------
+    scsi_add_device()  ------+
+			    |
+			slave_alloc()
+			slave_configure()   [--> scsi_change_queue_depth()]
+
+In a similar fashion, an LLD may become aware that a SCSI device has been
+removed (unplugged) or the connection to it has been interrupted. Some
+existing SCSI transports (e.g. SPI) may not become aware that a SCSI
+device has been removed until a subsequent SCSI command fails which will
+probably cause that device to be set offline by the mid level. An LLD that
+detects the removal of a SCSI device can instigate its removal from
+upper layers with this sequence::
+
+		    SCSI DEVICE hot unplug
+    LLD                      mid level                 LLD
+    ===----------------------=========-----------------===------
+    scsi_remove_device() -------+
+				|
+			slave_destroy()
+
+It may be useful for an LLD to keep track of struct scsi_device instances
+(a pointer is passed as the parameter to slave_alloc() and
+slave_configure() callbacks). Such instances are "owned" by the mid-level.
+struct scsi_device instances are freed after slave_destroy().
+
+
+Reference Counting
+==================
+The Scsi_Host structure has had reference counting infrastructure added.
+This effectively spreads the ownership of struct Scsi_Host instances
+across the various SCSI layers which use them. Previously such instances
+were exclusively owned by the mid level. LLDs would not usually need to
+directly manipulate these reference counts but there may be some cases
+where they do.
+
+There are 3 reference counting functions of interest associated with
+struct Scsi_Host:
+
+  - scsi_host_alloc():
+	returns a pointer to new instance of struct
+        Scsi_Host which has its reference count ^^ set to 1
+
+  - scsi_host_get():
+	adds 1 to the reference count of the given instance
+
+  - scsi_host_put():
+	decrements 1 from the reference count of the given
+        instance. If the reference count reaches 0 then the given instance
+        is freed
+
+The scsi_device structure has had reference counting infrastructure added.
+This effectively spreads the ownership of struct scsi_device instances
+across the various SCSI layers which use them. Previously such instances
+were exclusively owned by the mid level. See the access functions declared
+towards the end of include/scsi/scsi_device.h . If an LLD wants to keep
+a copy of a pointer to a scsi_device instance it should use scsi_device_get()
+to bump its reference count. When it is finished with the pointer it can
+use scsi_device_put() to decrement its reference count (and potentially
+delete it).
+
+.. Note::
+
+   struct Scsi_Host actually has 2 reference counts which are manipulated
+   in parallel by these functions.
+
+
+Conventions
+===========
+First, Linus Torvalds's thoughts on C coding style can be found in the
+Documentation/process/coding-style.rst file.
+
+Next, there is a movement to "outlaw" typedefs introducing synonyms for
+struct tags. Both can be still found in the SCSI subsystem, but
+the typedefs have been moved to a single file, scsi_typedefs.h to
+make their future removal easier, for example:
+"typedef struct scsi_cmnd Scsi_Cmnd;"
+
+Also, most C99 enhancements are encouraged to the extent they are supported
+by the relevant gcc compilers. So C99 style structure and array
+initializers are encouraged where appropriate. Don't go too far,
+VLAs are not properly supported yet.  An exception to this is the use of
+``//`` style comments; ``/*...*/`` comments are still preferred in Linux.
+
+Well written, tested and documented code, need not be re-formatted to
+comply with the above conventions. For example, the aic7xxx driver
+comes to Linux from FreeBSD and Adaptec's own labs. No doubt FreeBSD
+and Adaptec have their own coding conventions.
+
+
+Mid level supplied functions
+============================
+These functions are supplied by the SCSI mid level for use by LLDs.
+The names (i.e. entry points) of these functions are exported
+so an LLD that is a module can access them. The kernel will
+arrange for the SCSI mid level to be loaded and initialized before any LLD
+is initialized. The functions below are listed alphabetically and their
+names all start with ``scsi_``.
+
+Summary:
+
+  - scsi_add_device - creates new scsi device (lu) instance
+  - scsi_add_host - perform sysfs registration and set up transport class
+  - scsi_change_queue_depth - change the queue depth on a SCSI device
+  - scsi_bios_ptable - return copy of block device's partition table
+  - scsi_block_requests - prevent further commands being queued to given host
+  - scsi_host_alloc - return a new scsi_host instance whose refcount==1
+  - scsi_host_get - increments Scsi_Host instance's refcount
+  - scsi_host_put - decrements Scsi_Host instance's refcount (free if 0)
+  - scsi_partsize - parse partition table into cylinders, heads + sectors
+  - scsi_register - create and register a scsi host adapter instance.
+  - scsi_remove_device - detach and remove a SCSI device
+  - scsi_remove_host - detach and remove all SCSI devices owned by host
+  - scsi_report_bus_reset - report scsi _bus_ reset observed
+  - scsi_scan_host - scan SCSI bus
+  - scsi_track_queue_full - track successive QUEUE_FULL events
+  - scsi_unblock_requests - allow further commands to be queued to given host
+  - scsi_unregister - [calls scsi_host_put()]
+
+
+Details::
+
+    /**
+    * scsi_add_device - creates new scsi device (lu) instance
+    * @shost:   pointer to scsi host instance
+    * @channel: channel number (rarely other than 0)
+    * @id:      target id number
+    * @lun:     logical unit number
+    *
+    *      Returns pointer to new struct scsi_device instance or
+    *      ERR_PTR(-ENODEV) (or some other bent pointer) if something is
+    *      wrong (e.g. no lu responds at given address)
+    *
+    *      Might block: yes
+    *
+    *      Notes: This call is usually performed internally during a scsi
+    *      bus scan when an HBA is added (i.e. scsi_scan_host()). So it
+    *      should only be called if the HBA becomes aware of a new scsi
+    *      device (lu) after scsi_scan_host() has completed. If successful
+    *      this call can lead to slave_alloc() and slave_configure() callbacks
+    *      into the LLD.
+    *
+    *      Defined in: drivers/scsi/scsi_scan.c
+    **/
+    struct scsi_device * scsi_add_device(struct Scsi_Host *shost,
+					unsigned int channel,
+					unsigned int id, unsigned int lun)
+
+
+    /**
+    * scsi_add_host - perform sysfs registration and set up transport class
+    * @shost:   pointer to scsi host instance
+    * @dev:     pointer to struct device of type scsi class
+    *
+    *      Returns 0 on success, negative errno of failure (e.g. -ENOMEM)
+    *
+    *      Might block: no
+    *
+    *      Notes: Only required in "hotplug initialization model" after a
+    *      successful call to scsi_host_alloc().  This function does not
+    *	scan the bus; this can be done by calling scsi_scan_host() or
+    *	in some other transport-specific way.  The LLD must set up
+    *	the transport template before calling this function and may only
+    *	access the transport class data after this function has been called.
+    *
+    *      Defined in: drivers/scsi/hosts.c
+    **/
+    int scsi_add_host(struct Scsi_Host *shost, struct device * dev)
+
+
+    /**
+    * scsi_change_queue_depth - allow LLD to change queue depth on a SCSI device
+    * @sdev:       pointer to SCSI device to change queue depth on
+    * @tags        Number of tags allowed if tagged queuing enabled,
+    *              or number of commands the LLD can queue up
+    *              in non-tagged mode (as per cmd_per_lun).
+    *
+    *      Returns nothing
+    *
+    *      Might block: no
+    *
+    *      Notes: Can be invoked any time on a SCSI device controlled by this
+    *      LLD. [Specifically during and after slave_configure() and prior to
+    *      slave_destroy().] Can safely be invoked from interrupt code.
+    *
+    *      Defined in: drivers/scsi/scsi.c [see source code for more notes]
+    *
+    **/
+    int scsi_change_queue_depth(struct scsi_device *sdev, int tags)
+
+
+    /**
+    * scsi_bios_ptable - return copy of block device's partition table
+    * @dev:        pointer to block device
+    *
+    *      Returns pointer to partition table, or NULL for failure
+    *
+    *      Might block: yes
+    *
+    *      Notes: Caller owns memory returned (free with kfree() )
+    *
+    *      Defined in: drivers/scsi/scsicam.c
+    **/
+    unsigned char *scsi_bios_ptable(struct block_device *dev)
+
+
+    /**
+    * scsi_block_requests - prevent further commands being queued to given host
+    *
+    * @shost: pointer to host to block commands on
+    *
+    *      Returns nothing
+    *
+    *      Might block: no
+    *
+    *      Notes: There is no timer nor any other means by which the requests
+    *      get unblocked other than the LLD calling scsi_unblock_requests().
+    *
+    *      Defined in: drivers/scsi/scsi_lib.c
+    **/
+    void scsi_block_requests(struct Scsi_Host * shost)
+
+
+    /**
+    * scsi_host_alloc - create a scsi host adapter instance and perform basic
+    *                   initialization.
+    * @sht:        pointer to scsi host template
+    * @privsize:   extra bytes to allocate in hostdata array (which is the
+    *              last member of the returned Scsi_Host instance)
+    *
+    *      Returns pointer to new Scsi_Host instance or NULL on failure
+    *
+    *      Might block: yes
+    *
+    *      Notes: When this call returns to the LLD, the SCSI bus scan on
+    *      this host has _not_ yet been done.
+    *      The hostdata array (by default zero length) is a per host scratch
+    *      area for the LLD's exclusive use.
+    *      Both associated refcounting objects have their refcount set to 1.
+    *      Full registration (in sysfs) and a bus scan are performed later when
+    *      scsi_add_host() and scsi_scan_host() are called.
+    *
+    *      Defined in: drivers/scsi/hosts.c .
+    **/
+    struct Scsi_Host * scsi_host_alloc(struct scsi_host_template * sht,
+				    int privsize)
+
+
+    /**
+    * scsi_host_get - increment Scsi_Host instance refcount
+    * @shost:   pointer to struct Scsi_Host instance
+    *
+    *      Returns nothing
+    *
+    *      Might block: currently may block but may be changed to not block
+    *
+    *      Notes: Actually increments the counts in two sub-objects
+    *
+    *      Defined in: drivers/scsi/hosts.c
+    **/
+    void scsi_host_get(struct Scsi_Host *shost)
+
+
+    /**
+    * scsi_host_put - decrement Scsi_Host instance refcount, free if 0
+    * @shost:   pointer to struct Scsi_Host instance
+    *
+    *      Returns nothing
+    *
+    *      Might block: currently may block but may be changed to not block
+    *
+    *      Notes: Actually decrements the counts in two sub-objects. If the
+    *      latter refcount reaches 0, the Scsi_Host instance is freed.
+    *      The LLD need not worry exactly when the Scsi_Host instance is
+    *      freed, it just shouldn't access the instance after it has balanced
+    *      out its refcount usage.
+    *
+    *      Defined in: drivers/scsi/hosts.c
+    **/
+    void scsi_host_put(struct Scsi_Host *shost)
+
+
+    /**
+    * scsi_partsize - parse partition table into cylinders, heads + sectors
+    * @buf: pointer to partition table
+    * @capacity: size of (total) disk in 512 byte sectors
+    * @cyls: outputs number of cylinders calculated via this pointer
+    * @hds: outputs number of heads calculated via this pointer
+    * @secs: outputs number of sectors calculated via this pointer
+    *
+    *      Returns 0 on success, -1 on failure
+    *
+    *      Might block: no
+    *
+    *      Notes: Caller owns memory returned (free with kfree() )
+    *
+    *      Defined in: drivers/scsi/scsicam.c
+    **/
+    int scsi_partsize(unsigned char *buf, unsigned long capacity,
+		    unsigned int *cyls, unsigned int *hds, unsigned int *secs)
+
+
+    /**
+    * scsi_register - create and register a scsi host adapter instance.
+    * @sht:        pointer to scsi host template
+    * @privsize:   extra bytes to allocate in hostdata array (which is the
+    *              last member of the returned Scsi_Host instance)
+    *
+    *      Returns pointer to new Scsi_Host instance or NULL on failure
+    *
+    *      Might block: yes
+    *
+    *      Notes: When this call returns to the LLD, the SCSI bus scan on
+    *      this host has _not_ yet been done.
+    *      The hostdata array (by default zero length) is a per host scratch
+    *      area for the LLD.
+    *
+    *      Defined in: drivers/scsi/hosts.c .
+    **/
+    struct Scsi_Host * scsi_register(struct scsi_host_template * sht,
+				    int privsize)
+
+
+    /**
+    * scsi_remove_device - detach and remove a SCSI device
+    * @sdev:      a pointer to a scsi device instance
+    *
+    *      Returns value: 0 on success, -EINVAL if device not attached
+    *
+    *      Might block: yes
+    *
+    *      Notes: If an LLD becomes aware that a scsi device (lu) has
+    *      been removed but its host is still present then it can request
+    *      the removal of that scsi device. If successful this call will
+    *      lead to the slave_destroy() callback being invoked. sdev is an
+    *      invalid pointer after this call.
+    *
+    *      Defined in: drivers/scsi/scsi_sysfs.c .
+    **/
+    int scsi_remove_device(struct scsi_device *sdev)
+
+
+    /**
+    * scsi_remove_host - detach and remove all SCSI devices owned by host
+    * @shost:      a pointer to a scsi host instance
+    *
+    *      Returns value: 0 on success, 1 on failure (e.g. LLD busy ??)
+    *
+    *      Might block: yes
+    *
+    *      Notes: Should only be invoked if the "hotplug initialization
+    *      model" is being used. It should be called _prior_ to
+    *      scsi_unregister().
+    *
+    *      Defined in: drivers/scsi/hosts.c .
+    **/
+    int scsi_remove_host(struct Scsi_Host *shost)
+
+
+    /**
+    * scsi_report_bus_reset - report scsi _bus_ reset observed
+    * @shost: a pointer to a scsi host involved
+    * @channel: channel (within) host on which scsi bus reset occurred
+    *
+    *      Returns nothing
+    *
+    *      Might block: no
+    *
+    *      Notes: This only needs to be called if the reset is one which
+    *      originates from an unknown location.  Resets originated by the
+    *      mid level itself don't need to call this, but there should be
+    *      no harm.  The main purpose of this is to make sure that a
+    *      CHECK_CONDITION is properly treated.
+    *
+    *      Defined in: drivers/scsi/scsi_error.c .
+    **/
+    void scsi_report_bus_reset(struct Scsi_Host * shost, int channel)
+
+
+    /**
+    * scsi_scan_host - scan SCSI bus
+    * @shost: a pointer to a scsi host instance
+    *
+    *	Might block: yes
+    *
+    *	Notes: Should be called after scsi_add_host()
+    *
+    *	Defined in: drivers/scsi/scsi_scan.c
+    **/
+    void scsi_scan_host(struct Scsi_Host *shost)
+
+
+    /**
+    * scsi_track_queue_full - track successive QUEUE_FULL events on given
+    *                      device to determine if and when there is a need
+    *                      to adjust the queue depth on the device.
+    * @sdev:  pointer to SCSI device instance
+    * @depth: Current number of outstanding SCSI commands on this device,
+    *         not counting the one returned as QUEUE_FULL.
+    *
+    *      Returns 0  - no change needed
+    *              >0 - adjust queue depth to this new depth
+    *              -1 - drop back to untagged operation using host->cmd_per_lun
+    *                   as the untagged command depth
+    *
+    *      Might block: no
+    *
+    *      Notes: LLDs may call this at any time and we will do "The Right
+    *              Thing"; interrupt context safe.
+    *
+    *      Defined in: drivers/scsi/scsi.c .
+    **/
+    int scsi_track_queue_full(struct scsi_device *sdev, int depth)
+
+
+    /**
+    * scsi_unblock_requests - allow further commands to be queued to given host
+    *
+    * @shost: pointer to host to unblock commands on
+    *
+    *      Returns nothing
+    *
+    *      Might block: no
+    *
+    *      Defined in: drivers/scsi/scsi_lib.c .
+    **/
+    void scsi_unblock_requests(struct Scsi_Host * shost)
+
+
+    /**
+    * scsi_unregister - unregister and free memory used by host instance
+    * @shp:        pointer to scsi host instance to unregister.
+    *
+    *      Returns nothing
+    *
+    *      Might block: no
+    *
+    *      Notes: Should not be invoked if the "hotplug initialization
+    *      model" is being used. Called internally by exit_this_scsi_driver()
+    *      in the "passive initialization model". Hence a LLD has no need to
+    *      call this function directly.
+    *
+    *      Defined in: drivers/scsi/hosts.c .
+    **/
+    void scsi_unregister(struct Scsi_Host * shp)
+
+
+
+
+Interface Functions
+===================
+Interface functions are supplied (defined) by LLDs and their function
+pointers are placed in an instance of struct scsi_host_template which
+is passed to scsi_host_alloc() [or scsi_register() / init_this_scsi_driver()].
+Some are mandatory. Interface functions should be declared static. The
+accepted convention is that driver "xyz" will declare its slave_configure()
+function as::
+
+    static int xyz_slave_configure(struct scsi_device * sdev);
+
+and so forth for all interface functions listed below.
+
+A pointer to this function should be placed in the 'slave_configure' member
+of a "struct scsi_host_template" instance. A pointer to such an instance
+should be passed to the mid level's scsi_host_alloc() [or scsi_register() /
+init_this_scsi_driver()].
+
+The interface functions are also described in the include/scsi/scsi_host.h
+file immediately above their definition point in "struct scsi_host_template".
+In some cases more detail is given in scsi_host.h than below.
+
+The interface functions are listed below in alphabetical order.
+
+Summary:
+
+  - bios_param - fetch head, sector, cylinder info for a disk
+  - eh_timed_out - notify the host that a command timer expired
+  - eh_abort_handler - abort given command
+  - eh_bus_reset_handler - issue SCSI bus reset
+  - eh_device_reset_handler - issue SCSI device reset
+  - eh_host_reset_handler - reset host (host bus adapter)
+  - info - supply information about given host
+  - ioctl - driver can respond to ioctls
+  - proc_info - supports /proc/scsi/{driver_name}/{host_no}
+  - queuecommand - queue scsi command, invoke 'done' on completion
+  - slave_alloc - prior to any commands being sent to a new device
+  - slave_configure - driver fine tuning for given device after attach
+  - slave_destroy - given device is about to be shut down
+
+
+Details::
+
+    /**
+    *      bios_param - fetch head, sector, cylinder info for a disk
+    *      @sdev: pointer to scsi device context (defined in
+    *             include/scsi/scsi_device.h)
+    *      @bdev: pointer to block device context (defined in fs.h)
+    *      @capacity:  device size (in 512 byte sectors)
+    *      @params: three element array to place output:
+    *              params[0] number of heads (max 255)
+    *              params[1] number of sectors (max 63)
+    *              params[2] number of cylinders
+    *
+    *      Return value is ignored
+    *
+    *      Locks: none
+    *
+    *      Calling context: process (sd)
+    *
+    *      Notes: an arbitrary geometry (based on READ CAPACITY) is used
+    *      if this function is not provided. The params array is
+    *      pre-initialized with made up values just in case this function
+    *      doesn't output anything.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int bios_param(struct scsi_device * sdev, struct block_device *bdev,
+		    sector_t capacity, int params[3])
+
+
+    /**
+    *      eh_timed_out - The timer for the command has just fired
+    *      @scp: identifies command timing out
+    *
+    *      Returns:
+    *
+    *      EH_HANDLED:             I fixed the error, please complete the command
+    *      EH_RESET_TIMER:         I need more time, reset the timer and
+    *                              begin counting again
+    *      EH_NOT_HANDLED          Begin normal error recovery
+    *
+    *
+    *      Locks: None held
+    *
+    *      Calling context: interrupt
+    *
+    *      Notes: This is to give the LLD an opportunity to do local recovery.
+    *      This recovery is limited to determining if the outstanding command
+    *      will ever complete.  You may not abort and restart the command from
+    *      this callback.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int eh_timed_out(struct scsi_cmnd * scp)
+
+
+    /**
+    *      eh_abort_handler - abort command associated with scp
+    *      @scp: identifies command to be aborted
+    *
+    *      Returns SUCCESS if command aborted else FAILED
+    *
+    *      Locks: None held
+    *
+    *      Calling context: kernel thread
+    *
+    *      Notes: If 'no_async_abort' is defined this callback
+    *  	will be invoked from scsi_eh thread. No other commands
+    *	will then be queued on current host during eh.
+    *	Otherwise it will be called whenever scsi_times_out()
+    *      is called due to a command timeout.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int eh_abort_handler(struct scsi_cmnd * scp)
+
+
+    /**
+    *      eh_bus_reset_handler - issue SCSI bus reset
+    *      @scp: SCSI bus that contains this device should be reset
+    *
+    *      Returns SUCCESS if command aborted else FAILED
+    *
+    *      Locks: None held
+    *
+    *      Calling context: kernel thread
+    *
+    *      Notes: Invoked from scsi_eh thread. No other commands will be
+    *      queued on current host during eh.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int eh_bus_reset_handler(struct scsi_cmnd * scp)
+
+
+    /**
+    *      eh_device_reset_handler - issue SCSI device reset
+    *      @scp: identifies SCSI device to be reset
+    *
+    *      Returns SUCCESS if command aborted else FAILED
+    *
+    *      Locks: None held
+    *
+    *      Calling context: kernel thread
+    *
+    *      Notes: Invoked from scsi_eh thread. No other commands will be
+    *      queued on current host during eh.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int eh_device_reset_handler(struct scsi_cmnd * scp)
+
+
+    /**
+    *      eh_host_reset_handler - reset host (host bus adapter)
+    *      @scp: SCSI host that contains this device should be reset
+    *
+    *      Returns SUCCESS if command aborted else FAILED
+    *
+    *      Locks: None held
+    *
+    *      Calling context: kernel thread
+    *
+    *      Notes: Invoked from scsi_eh thread. No other commands will be
+    *      queued on current host during eh.
+    *      With the default eh_strategy in place, if none of the _abort_,
+    *      _device_reset_, _bus_reset_ or this eh handler function are
+    *      defined (or they all return FAILED) then the device in question
+    *      will be set offline whenever eh is invoked.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int eh_host_reset_handler(struct scsi_cmnd * scp)
+
+
+    /**
+    *      info - supply information about given host: driver name plus data
+    *             to distinguish given host
+    *      @shp: host to supply information about
+    *
+    *      Return ASCII null terminated string. [This driver is assumed to
+    *      manage the memory pointed to and maintain it, typically for the
+    *      lifetime of this host.]
+    *
+    *      Locks: none
+    *
+    *      Calling context: process
+    *
+    *      Notes: Often supplies PCI or ISA information such as IO addresses
+    *      and interrupt numbers. If not supplied struct Scsi_Host::name used
+    *      instead. It is assumed the returned information fits on one line
+    *      (i.e. does not included embedded newlines).
+    *      The SCSI_IOCTL_PROBE_HOST ioctl yields the string returned by this
+    *      function (or struct Scsi_Host::name if this function is not
+    *      available).
+    *      In a similar manner, init_this_scsi_driver() outputs to the console
+    *      each host's "info" (or name) for the driver it is registering.
+    *      Also if proc_info() is not supplied, the output of this function
+    *      is used instead.
+    *
+    *      Optionally defined in: LLD
+    **/
+	const char * info(struct Scsi_Host * shp)
+
+
+    /**
+    *      ioctl - driver can respond to ioctls
+    *      @sdp: device that ioctl was issued for
+    *      @cmd: ioctl number
+    *      @arg: pointer to read or write data from. Since it points to
+    *            user space, should use appropriate kernel functions
+    *            (e.g. copy_from_user() ). In the Unix style this argument
+    *            can also be viewed as an unsigned long.
+    *
+    *      Returns negative "errno" value when there is a problem. 0 or a
+    *      positive value indicates success and is returned to the user space.
+    *
+    *      Locks: none
+    *
+    *      Calling context: process
+    *
+    *      Notes: The SCSI subsystem uses a "trickle down" ioctl model.
+    *      The user issues an ioctl() against an upper level driver
+    *      (e.g. /dev/sdc) and if the upper level driver doesn't recognize
+    *      the 'cmd' then it is passed to the SCSI mid level. If the SCSI
+    *      mid level does not recognize it, then the LLD that controls
+    *      the device receives the ioctl. According to recent Unix standards
+    *      unsupported ioctl() 'cmd' numbers should return -ENOTTY.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int ioctl(struct scsi_device *sdp, int cmd, void *arg)
+
+
+    /**
+    *      proc_info - supports /proc/scsi/{driver_name}/{host_no}
+    *      @buffer: anchor point to output to (0==writeto1_read0) or fetch from
+    *               (1==writeto1_read0).
+    *      @start: where "interesting" data is written to. Ignored when
+    *              1==writeto1_read0.
+    *      @offset: offset within buffer 0==writeto1_read0 is actually
+    *               interested in. Ignored when 1==writeto1_read0 .
+    *      @length: maximum (or actual) extent of buffer
+    *      @host_no: host number of interest (struct Scsi_Host::host_no)
+    *      @writeto1_read0: 1 -> data coming from user space towards driver
+    *                            (e.g. "echo some_string > /proc/scsi/xyz/2")
+    *                       0 -> user what data from this driver
+    *                            (e.g. "cat /proc/scsi/xyz/2")
+    *
+    *      Returns length when 1==writeto1_read0. Otherwise number of chars
+    *      output to buffer past offset.
+    *
+    *      Locks: none held
+    *
+    *      Calling context: process
+    *
+    *      Notes: Driven from scsi_proc.c which interfaces to proc_fs. proc_fs
+    *      support can now be configured out of the scsi subsystem.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int proc_info(char * buffer, char ** start, off_t offset,
+		    int length, int host_no, int writeto1_read0)
+
+
+    /**
+    *      queuecommand - queue scsi command, invoke scp->scsi_done on completion
+    *      @shost: pointer to the scsi host object
+    *      @scp: pointer to scsi command object
+    *
+    *      Returns 0 on success.
+    *
+    *      If there's a failure, return either:
+    *
+    *      SCSI_MLQUEUE_DEVICE_BUSY if the device queue is full, or
+    *      SCSI_MLQUEUE_HOST_BUSY if the entire host queue is full
+    *
+    *      On both of these returns, the mid-layer will requeue the I/O
+    *
+    *      - if the return is SCSI_MLQUEUE_DEVICE_BUSY, only that particular
+    *      device will be paused, and it will be unpaused when a command to
+    *      the device returns (or after a brief delay if there are no more
+    *      outstanding commands to it).  Commands to other devices continue
+    *      to be processed normally.
+    *
+    *      - if the return is SCSI_MLQUEUE_HOST_BUSY, all I/O to the host
+    *      is paused and will be unpaused when any command returns from
+    *      the host (or after a brief delay if there are no outstanding
+    *      commands to the host).
+    *
+    *      For compatibility with earlier versions of queuecommand, any
+    *      other return value is treated the same as
+    *      SCSI_MLQUEUE_HOST_BUSY.
+    *
+    *      Other types of errors that are detected immediately may be
+    *      flagged by setting scp->result to an appropriate value,
+    *      invoking the scp->scsi_done callback, and then returning 0
+    *      from this function. If the command is not performed
+    *      immediately (and the LLD is starting (or will start) the given
+    *      command) then this function should place 0 in scp->result and
+    *      return 0.
+    *
+    *      Command ownership.  If the driver returns zero, it owns the
+    *      command and must take responsibility for ensuring the
+    *      scp->scsi_done callback is executed.  Note: the driver may
+    *      call scp->scsi_done before returning zero, but after it has
+    *      called scp->scsi_done, it may not return any value other than
+    *      zero.  If the driver makes a non-zero return, it must not
+    *      execute the command's scsi_done callback at any time.
+    *
+    *      Locks: up to and including 2.6.36, struct Scsi_Host::host_lock
+    *             held on entry (with "irqsave") and is expected to be
+    *             held on return. From 2.6.37 onwards, queuecommand is
+    *             called without any locks held.
+    *
+    *      Calling context: in interrupt (soft irq) or process context
+    *
+    *      Notes: This function should be relatively fast. Normally it
+    *      will not wait for IO to complete. Hence the scp->scsi_done
+    *      callback is invoked (often directly from an interrupt service
+    *      routine) some time after this function has returned. In some
+    *      cases (e.g. pseudo adapter drivers that manufacture the
+    *      response to a SCSI INQUIRY) the scp->scsi_done callback may be
+    *      invoked before this function returns.  If the scp->scsi_done
+    *      callback is not invoked within a certain period the SCSI mid
+    *      level will commence error processing.  If a status of CHECK
+    *      CONDITION is placed in "result" when the scp->scsi_done
+    *      callback is invoked, then the LLD driver should perform
+    *      autosense and fill in the struct scsi_cmnd::sense_buffer
+    *      array. The scsi_cmnd::sense_buffer array is zeroed prior to
+    *      the mid level queuing a command to an LLD.
+    *
+    *      Defined in: LLD
+    **/
+	int queuecommand(struct Scsi_Host *shost, struct scsi_cmnd * scp)
+
+
+    /**
+    *      slave_alloc -   prior to any commands being sent to a new device
+    *                      (i.e. just prior to scan) this call is made
+    *      @sdp: pointer to new device (about to be scanned)
+    *
+    *      Returns 0 if ok. Any other return is assumed to be an error and
+    *      the device is ignored.
+    *
+    *      Locks: none
+    *
+    *      Calling context: process
+    *
+    *      Notes: Allows the driver to allocate any resources for a device
+    *      prior to its initial scan. The corresponding scsi device may not
+    *      exist but the mid level is just about to scan for it (i.e. send
+    *      and INQUIRY command plus ...). If a device is found then
+    *      slave_configure() will be called while if a device is not found
+    *      slave_destroy() is called.
+    *      For more details see the include/scsi/scsi_host.h file.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int slave_alloc(struct scsi_device *sdp)
+
+
+    /**
+    *      slave_configure - driver fine tuning for given device just after it
+    *                     has been first scanned (i.e. it responded to an
+    *                     INQUIRY)
+    *      @sdp: device that has just been attached
+    *
+    *      Returns 0 if ok. Any other return is assumed to be an error and
+    *      the device is taken offline. [offline devices will _not_ have
+    *      slave_destroy() called on them so clean up resources.]
+    *
+    *      Locks: none
+    *
+    *      Calling context: process
+    *
+    *      Notes: Allows the driver to inspect the response to the initial
+    *      INQUIRY done by the scanning code and take appropriate action.
+    *      For more details see the include/scsi/scsi_host.h file.
+    *
+    *      Optionally defined in: LLD
+    **/
+	int slave_configure(struct scsi_device *sdp)
+
+
+    /**
+    *      slave_destroy - given device is about to be shut down. All
+    *                      activity has ceased on this device.
+    *      @sdp: device that is about to be shut down
+    *
+    *      Returns nothing
+    *
+    *      Locks: none
+    *
+    *      Calling context: process
+    *
+    *      Notes: Mid level structures for given device are still in place
+    *      but are about to be torn down. Any per device resources allocated
+    *      by this driver for given device should be freed now. No further
+    *      commands will be sent for this sdp instance. [However the device
+    *      could be re-attached in the future in which case a new instance
+    *      of struct scsi_device would be supplied by future slave_alloc()
+    *      and slave_configure() calls.]
+    *
+    *      Optionally defined in: LLD
+    **/
+	void slave_destroy(struct scsi_device *sdp)
+
+
+
+Data Structures
+===============
+struct scsi_host_template
+-------------------------
+There is one "struct scsi_host_template" instance per LLD [#]_. It is
+typically initialized as a file scope static in a driver's header file. That
+way members that are not explicitly initialized will be set to 0 or NULL.
+Member of interest:
+
+    name
+		 - name of driver (may contain spaces, please limit to
+                   less than 80 characters)
+
+    proc_name
+		 - name used in "/proc/scsi/<proc_name>/<host_no>" and
+                   by sysfs in one of its "drivers" directories. Hence
+                   "proc_name" should only contain characters acceptable
+                   to a Unix file name.
+
+   ``(*queuecommand)()``
+		 - primary callback that the mid level uses to inject
+                   SCSI commands into an LLD.
+
+The structure is defined and commented in include/scsi/scsi_host.h
+
+.. [#] In extreme situations a single driver may have several instances
+       if it controls several different classes of hardware (e.g. an LLD
+       that handles both ISA and PCI cards and has a separate instance of
+       struct scsi_host_template for each class).
+
+struct Scsi_Host
+----------------
+There is one struct Scsi_Host instance per host (HBA) that an LLD
+controls. The struct Scsi_Host structure has many members in common
+with "struct scsi_host_template". When a new struct Scsi_Host instance
+is created (in scsi_host_alloc() in hosts.c) those common members are
+initialized from the driver's struct scsi_host_template instance. Members
+of interest:
+
+    host_no
+		 - system wide unique number that is used for identifying
+                   this host. Issued in ascending order from 0.
+    can_queue
+		 - must be greater than 0; do not send more than can_queue
+                   commands to the adapter.
+    this_id
+		 - scsi id of host (scsi initiator) or -1 if not known
+    sg_tablesize
+		 - maximum scatter gather elements allowed by host.
+                   Set this to SG_ALL or less to avoid chained SG lists.
+                   Must be at least 1.
+    max_sectors
+		 - maximum number of sectors (usually 512 bytes) allowed
+                   in a single SCSI command. The default value of 0 leads
+                   to a setting of SCSI_DEFAULT_MAX_SECTORS (defined in
+                   scsi_host.h) which is currently set to 1024. So for a
+                   disk the maximum transfer size is 512 KB when max_sectors
+                   is not defined. Note that this size may not be sufficient
+                   for disk firmware uploads.
+    cmd_per_lun
+		 - maximum number of commands that can be queued on devices
+                   controlled by the host. Overridden by LLD calls to
+                   scsi_change_queue_depth().
+    unchecked_isa_dma
+		 - 1=>only use bottom 16 MB of ram (ISA DMA addressing
+                   restriction), 0=>can use full 32 bit (or better) DMA
+                   address space
+    no_async_abort
+		 - 1=>Asynchronous aborts are not supported
+		 - 0=>Timed-out commands will be aborted asynchronously
+    hostt
+		 - pointer to driver's struct scsi_host_template from which
+                   this struct Scsi_Host instance was spawned
+    hostt->proc_name
+		 - name of LLD. This is the driver name that sysfs uses
+    transportt
+		 - pointer to driver's struct scsi_transport_template instance
+                   (if any). FC and SPI transports currently supported.
+    sh_list
+		 - a double linked list of pointers to all struct Scsi_Host
+                   instances (currently ordered by ascending host_no)
+    my_devices
+		 - a double linked list of pointers to struct scsi_device
+                   instances that belong to this host.
+    hostdata[0]
+		 - area reserved for LLD at end of struct Scsi_Host. Size
+                   is set by the second argument (named 'xtr_bytes') to
+                   scsi_host_alloc() or scsi_register().
+    vendor_id
+		 - a unique value that identifies the vendor supplying
+                   the LLD for the Scsi_Host.  Used most often in validating
+                   vendor-specific message requests.  Value consists of an
+                   identifier type and a vendor-specific value.
+                   See scsi_netlink.h for a description of valid formats.
+
+The scsi_host structure is defined in include/scsi/scsi_host.h
+
+struct scsi_device
+------------------
+Generally, there is one instance of this structure for each SCSI logical unit
+on a host. Scsi devices connected to a host are uniquely identified by a
+channel number, target id and logical unit number (lun).
+The structure is defined in include/scsi/scsi_device.h
+
+struct scsi_cmnd
+----------------
+Instances of this structure convey SCSI commands to the LLD and responses
+back to the mid level. The SCSI mid level will ensure that no more SCSI
+commands become queued against the LLD than are indicated by
+scsi_change_queue_depth() (or struct Scsi_Host::cmd_per_lun). There will
+be at least one instance of struct scsi_cmnd available for each SCSI device.
+Members of interest:
+
+    cmnd
+		 - array containing SCSI command
+    cmnd_len
+		 - length (in bytes) of SCSI command
+    sc_data_direction
+		 - direction of data transfer in data phase. See
+                   "enum dma_data_direction" in include/linux/dma-mapping.h
+    request_bufflen
+		 - number of data bytes to transfer (0 if no data phase)
+    use_sg
+		 - ==0 -> no scatter gather list, hence transfer data
+                          to/from request_buffer
+                 - >0 ->  scatter gather list (actually an array) in
+                          request_buffer with use_sg elements
+    request_buffer
+		   - either contains data buffer or scatter gather list
+                     depending on the setting of use_sg. Scatter gather
+                     elements are defined by 'struct scatterlist' found
+                     in include/linux/scatterlist.h .
+    done
+		 - function pointer that should be invoked by LLD when the
+                   SCSI command is completed (successfully or otherwise).
+                   Should only be called by an LLD if the LLD has accepted
+                   the command (i.e. queuecommand() returned or will return
+                   0). The LLD may invoke 'done'  prior to queuecommand()
+                   finishing.
+    result
+		 - should be set by LLD prior to calling 'done'. A value
+                   of 0 implies a successfully completed command (and all
+                   data (if any) has been transferred to or from the SCSI
+                   target device). 'result' is a 32 bit unsigned integer that
+                   can be viewed as 4 related bytes. The SCSI status value is
+                   in the LSB. See include/scsi/scsi.h status_byte(),
+                   msg_byte(), host_byte() and driver_byte() macros and
+                   related constants.
+    sense_buffer
+		 - an array (maximum size: SCSI_SENSE_BUFFERSIZE bytes) that
+                   should be written when the SCSI status (LSB of 'result')
+                   is set to CHECK_CONDITION (2). When CHECK_CONDITION is
+                   set, if the top nibble of sense_buffer[0] has the value 7
+                   then the mid level will assume the sense_buffer array
+                   contains a valid SCSI sense buffer; otherwise the mid
+                   level will issue a REQUEST_SENSE SCSI command to
+                   retrieve the sense buffer. The latter strategy is error
+                   prone in the presence of command queuing so the LLD should
+                   always "auto-sense".
+    device
+		 - pointer to scsi_device object that this command is
+                   associated with.
+    resid
+		 - an LLD should set this signed integer to the requested
+                   transfer length (i.e. 'request_bufflen') less the number
+                   of bytes that are actually transferred. 'resid' is
+                   preset to 0 so an LLD can ignore it if it cannot detect
+                   underruns (overruns should be rare). If possible an LLD
+                   should set 'resid' prior to invoking 'done'. The most
+                   interesting case is data transfers from a SCSI target
+                   device (e.g. READs) that underrun.
+    underflow
+		 - LLD should place (DID_ERROR << 16) in 'result' if
+                   actual number of bytes transferred is less than this
+                   figure. Not many LLDs implement this check and some that
+                   do just output an error message to the log rather than
+                   report a DID_ERROR. Better for an LLD to implement
+                   'resid'.
+
+It is recommended that a LLD set 'resid' on data transfers from a SCSI
+target device (e.g. READs). It is especially important that 'resid' is set
+when such data transfers have sense keys of MEDIUM ERROR and HARDWARE ERROR
+(and possibly RECOVERED ERROR). In these cases if a LLD is in doubt how much
+data has been received then the safest approach is to indicate no bytes have
+been received. For example: to indicate that no valid data has been received
+a LLD might use these helpers::
+
+    scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
+
+where 'SCpnt' is a pointer to a scsi_cmnd object. To indicate only three 512
+bytes blocks has been received 'resid' could be set like this::
+
+    scsi_set_resid(SCpnt, scsi_bufflen(SCpnt) - (3 * 512));
+
+The scsi_cmnd structure is defined in include/scsi/scsi_cmnd.h
+
+
+Locks
+=====
+Each struct Scsi_Host instance has a spin_lock called struct
+Scsi_Host::default_lock which is initialized in scsi_host_alloc() [found in
+hosts.c]. Within the same function the struct Scsi_Host::host_lock pointer
+is initialized to point at default_lock.  Thereafter lock and unlock
+operations performed by the mid level use the struct Scsi_Host::host_lock
+pointer.  Previously drivers could override the host_lock pointer but
+this is not allowed anymore.
+
+
+Autosense
+=========
+Autosense (or auto-sense) is defined in the SAM-2 document as "the
+automatic return of sense data to the application client coincident
+with the completion of a SCSI command" when a status of CHECK CONDITION
+occurs. LLDs should perform autosense. This should be done when the LLD
+detects a CHECK CONDITION status by either:
+
+    a) instructing the SCSI protocol (e.g. SCSI Parallel Interface (SPI))
+       to perform an extra data in phase on such responses
+    b) or, the LLD issuing a REQUEST SENSE command itself
+
+Either way, when a status of CHECK CONDITION is detected, the mid level
+decides whether the LLD has performed autosense by checking struct
+scsi_cmnd::sense_buffer[0] . If this byte has an upper nibble of 7 (or 0xf)
+then autosense is assumed to have taken place. If it has another value (and
+this byte is initialized to 0 before each command) then the mid level will
+issue a REQUEST SENSE command.
+
+In the presence of queued commands the "nexus" that maintains sense
+buffer data from the command that failed until a following REQUEST SENSE
+may get out of synchronization. This is why it is best for the LLD
+to perform autosense.
+
+
+Changes since lk 2.4 series
+===========================
+io_request_lock has been replaced by several finer grained locks. The lock
+relevant to LLDs is struct Scsi_Host::host_lock and there is
+one per SCSI host.
+
+The older error handling mechanism has been removed. This means the
+LLD interface functions abort() and reset() have been removed.
+The struct scsi_host_template::use_new_eh_code flag has been removed.
+
+In the 2.4 series the SCSI subsystem configuration descriptions were
+aggregated with the configuration descriptions from all other Linux
+subsystems in the Documentation/Configure.help file. In the 2.6 series,
+the SCSI subsystem now has its own (much smaller) drivers/scsi/Kconfig
+file that contains both configuration and help information.
+
+struct SHT has been renamed to struct scsi_host_template.
+
+Addition of the "hotplug initialization model" and many extra functions
+to support it.
+
+
+Credits
+=======
+The following people have contributed to this document:
+
+	- Mike Anderson <andmike at us dot ibm dot com>
+	- James Bottomley <James dot Bottomley at hansenpartnership dot com>
+	- Patrick Mansfield <patmans at us dot ibm dot com>
+	- Christoph Hellwig <hch at infradead dot org>
+	- Doug Ledford <dledford at redhat dot com>
+	- Andries Brouwer <Andries dot Brouwer at cwi dot nl>
+	- Randy Dunlap <rdunlap at xenotime dot net>
+	- Alan Stern <stern at rowland dot harvard dot edu>
+
+
+Douglas Gilbert
+dgilbert at interlog dot com
+
+21st September 2004
diff --git a/Documentation/scsi/scsi_mid_low_api.txt b/Documentation/scsi/scsi_mid_low_api.txt
deleted file mode 100644
index 2a4be1c3e6db..000000000000
--- a/Documentation/scsi/scsi_mid_low_api.txt
+++ /dev/null
@@ -1,1280 +0,0 @@
-                          Linux Kernel 2.6 series
-                 SCSI mid_level - lower_level driver interface
-                 =============================================
-
-Introduction
-============
-This document outlines the interface between the Linux SCSI mid level and
-SCSI lower level drivers. Lower level drivers (LLDs) are variously called 
-host bus adapter (HBA) drivers and host drivers (HD). A "host" in this
-context is a bridge between a computer IO bus (e.g. PCI or ISA) and a
-single SCSI initiator port on a SCSI transport. An "initiator" port
-(SCSI terminology, see SAM-3 at http://www.t10.org) sends SCSI commands
-to "target" SCSI ports (e.g. disks). There can be many LLDs in a running
-system, but only one per hardware type. Most LLDs can control one or more
-SCSI HBAs. Some HBAs contain multiple hosts.
-
-In some cases the SCSI transport is an external bus that already has
-its own subsystem in Linux (e.g. USB and ieee1394). In such cases the
-SCSI subsystem LLD is a software bridge to the other driver subsystem.
-Examples are the usb-storage driver (found in the drivers/usb/storage
-directory) and the ieee1394/sbp2 driver (found in the drivers/ieee1394
-directory).
-
-For example, the aic7xxx LLD controls Adaptec SCSI parallel interface
-(SPI) controllers based on that company's 7xxx chip series. The aic7xxx
-LLD can be built into the kernel or loaded as a module. There can only be
-one aic7xxx LLD running in a Linux system but it may be controlling many 
-HBAs. These HBAs might be either on PCI daughter-boards or built into 
-the motherboard (or both). Some aic7xxx based HBAs are dual controllers
-and thus represent two hosts. Like most modern HBAs, each aic7xxx host
-has its own PCI device address. [The one-to-one correspondence between
-a SCSI host and a PCI device is common but not required (e.g. with
-ISA adapters).]
-
-The SCSI mid level isolates an LLD from other layers such as the SCSI
-upper layer drivers and the block layer.
-
-This version of the document roughly matches linux kernel version 2.6.8 .
-
-Documentation
-=============
-There is a SCSI documentation directory within the kernel source tree, 
-typically Documentation/scsi . Most documents are in plain
-(i.e. ASCII) text. This file is named scsi_mid_low_api.txt and can be 
-found in that directory. A more recent copy of this document may be found
-at http://web.archive.org/web/20070107183357rn_1/sg.torque.net/scsi/. 
-Many LLDs are documented there (e.g. aic7xxx.txt). The SCSI mid-level is
-briefly described in scsi.txt which contains a url to a document 
-describing the SCSI subsystem in the lk 2.4 series. Two upper level 
-drivers have documents in that directory: st.txt (SCSI tape driver) and 
-scsi-generic.txt (for the sg driver).
-
-Some documentation (or urls) for LLDs may be found in the C source code
-or in the same directory as the C source code. For example to find a url
-about the USB mass storage driver see the 
-/usr/src/linux/drivers/usb/storage directory.
-
-Driver structure
-================
-Traditionally an LLD for the SCSI subsystem has been at least two files in
-the drivers/scsi directory. For example, a driver called "xyz" has a header
-file "xyz.h" and a source file "xyz.c". [Actually there is no good reason
-why this couldn't all be in one file; the header file is superfluous.] Some
-drivers that have been ported to several operating systems have more than
-two files. For example the aic7xxx driver has separate files for generic 
-and OS-specific code (e.g. FreeBSD and Linux). Such drivers tend to have
-their own directory under the drivers/scsi directory.
-
-When a new LLD is being added to Linux, the following files (found in the
-drivers/scsi directory) will need some attention: Makefile and Kconfig .
-It is probably best to study how existing LLDs are organized.
-
-As the 2.5 series development kernels evolve into the 2.6 series
-production series, changes are being introduced into this interface. An
-example of this is driver initialization code where there are now 2 models
-available. The older one, similar to what was found in the lk 2.4 series,
-is based on hosts that are detected at HBA driver load time. This will be
-referred to the "passive" initialization model. The newer model allows HBAs
-to be hot plugged (and unplugged) during the lifetime of the LLD and will
-be referred to as the "hotplug" initialization model. The newer model is
-preferred as it can handle both traditional SCSI equipment that is
-permanently connected as well as modern "SCSI" devices (e.g. USB or
-IEEE 1394 connected digital cameras) that are hotplugged. Both 
-initialization models are discussed in the following sections.
-
-An LLD interfaces to the SCSI subsystem several ways:
-  a) directly invoking functions supplied by the mid level
-  b) passing a set of function pointers to a registration function
-     supplied by the mid level. The mid level will then invoke these
-     functions at some point in the future. The LLD will supply
-     implementations of these functions.
-  c) direct access to instances of well known data structures maintained
-     by the mid level
-
-Those functions in group a) are listed in a section entitled "Mid level
-supplied functions" below.
-
-Those functions in group b) are listed in a section entitled "Interface
-functions" below. Their function pointers are placed in the members of
-"struct scsi_host_template", an instance of which is passed to
-scsi_host_alloc() ** .  Those interface functions that the LLD does not 
-wish to supply should have NULL placed in the corresponding member of 
-struct scsi_host_template.  Defining an instance of struct 
-scsi_host_template at file scope will cause NULL to be  placed in function
- pointer members not explicitly initialized.
-
-Those usages in group c) should be handled with care, especially in a
-"hotplug" environment. LLDs should be aware of the lifetime of instances
-that are shared with the mid level and other layers.
-
-All functions defined within an LLD and all data defined at file scope
-should be static. For example the slave_alloc() function in an LLD
-called "xxx" could be defined as 
-"static int xxx_slave_alloc(struct scsi_device * sdev) { /* code */ }"
-
-** the scsi_host_alloc() function is a replacement for the rather vaguely
-named scsi_register() function in most situations.
-
-
-Hotplug initialization model
-============================
-In this model an LLD controls when SCSI hosts are introduced and removed
-from the SCSI subsystem. Hosts can be introduced as early as driver
-initialization and removed as late as driver shutdown. Typically a driver
-will respond to a sysfs probe() callback that indicates an HBA has been
-detected. After confirming that the new device is one that the LLD wants
-to control, the LLD will initialize the HBA and then register a new host
-with the SCSI mid level.
-
-During LLD initialization the driver should register itself with the
-appropriate IO bus on which it expects to find HBA(s) (e.g. the PCI bus).
-This can probably be done via sysfs. Any driver parameters (especially
-those that are writable after the driver is loaded) could also be
-registered with sysfs at this point. The SCSI mid level first becomes
-aware of an LLD when that LLD registers its first HBA.
-
-At some later time, the LLD becomes aware of an HBA and what follows
-is a typical sequence of calls between the LLD and the mid level.
-This example shows the mid level scanning the newly introduced HBA for 3 
-scsi devices of which only the first 2 respond:
-
-     HBA PROBE: assume 2 SCSI devices found in scan
-LLD                   mid level                    LLD
-===-------------------=========--------------------===------
-scsi_host_alloc()  -->
-scsi_add_host()  ---->
-scsi_scan_host()  -------+
-                         |
-                    slave_alloc()
-                    slave_configure() -->  scsi_change_queue_depth()
-                         |
-                    slave_alloc()
-                    slave_configure()
-                         |
-                    slave_alloc()   ***
-                    slave_destroy() ***
-------------------------------------------------------------
-
-If the LLD wants to adjust the default queue settings, it can invoke
-scsi_change_queue_depth() in its slave_configure() routine.
-
-*** For scsi devices that the mid level tries to scan but do not
-    respond, a slave_alloc(), slave_destroy() pair is called.
-
-When an HBA is being removed it could be as part of an orderly shutdown
-associated with the LLD module being unloaded (e.g. with the "rmmod"
-command) or in response to a "hot unplug" indicated by sysfs()'s
-remove() callback being invoked. In either case, the sequence is the
-same:
-
-        HBA REMOVE: assume 2 SCSI devices attached
-LLD                      mid level                 LLD
-===----------------------=========-----------------===------
-scsi_remove_host() ---------+
-                            |
-                     slave_destroy()
-                     slave_destroy()
-scsi_host_put()
-------------------------------------------------------------
-                     
-It may be useful for a LLD to keep track of struct Scsi_Host instances
-(a pointer is returned by scsi_host_alloc()). Such instances are "owned"
-by the mid-level.  struct Scsi_Host instances are freed from
-scsi_host_put() when the reference count hits zero.
-
-Hot unplugging an HBA that controls a disk which is processing SCSI
-commands on a mounted file system is an interesting situation. Reference
-counting logic is being introduced into the mid level to cope with many
-of the issues involved. See the section on reference counting below.
-
-
-The hotplug concept may be extended to SCSI devices. Currently, when an
-HBA is added, the scsi_scan_host() function causes a scan for SCSI devices
-attached to the HBA's SCSI transport. On newer SCSI transports the HBA
-may become aware of a new SCSI device _after_ the scan has completed.
-An LLD can use this sequence to make the mid level aware of a SCSI device:
-
-                 SCSI DEVICE hotplug
-LLD                   mid level                    LLD
-===-------------------=========--------------------===------
-scsi_add_device()  ------+
-                         |
-                    slave_alloc()
-                    slave_configure()   [--> scsi_change_queue_depth()]
-------------------------------------------------------------
-
-In a similar fashion, an LLD may become aware that a SCSI device has been
-removed (unplugged) or the connection to it has been interrupted. Some
-existing SCSI transports (e.g. SPI) may not become aware that a SCSI
-device has been removed until a subsequent SCSI command fails which will
-probably cause that device to be set offline by the mid level. An LLD that
-detects the removal of a SCSI device can instigate its removal from
-upper layers with this sequence:
-
-                  SCSI DEVICE hot unplug
-LLD                      mid level                 LLD
-===----------------------=========-----------------===------
-scsi_remove_device() -------+
-                            |
-                     slave_destroy()
-------------------------------------------------------------
-
-It may be useful for an LLD to keep track of struct scsi_device instances
-(a pointer is passed as the parameter to slave_alloc() and
-slave_configure() callbacks). Such instances are "owned" by the mid-level.
-struct scsi_device instances are freed after slave_destroy().
-
-
-Reference Counting
-==================
-The Scsi_Host structure has had reference counting infrastructure added.
-This effectively spreads the ownership of struct Scsi_Host instances
-across the various SCSI layers which use them. Previously such instances
-were exclusively owned by the mid level. LLDs would not usually need to
-directly manipulate these reference counts but there may be some cases
-where they do.
-
-There are 3 reference counting functions of interest associated with
-struct Scsi_Host:
-  - scsi_host_alloc(): returns a pointer to new instance of struct 
-        Scsi_Host which has its reference count ^^ set to 1
-  - scsi_host_get(): adds 1 to the reference count of the given instance
-  - scsi_host_put(): decrements 1 from the reference count of the given
-        instance. If the reference count reaches 0 then the given instance
-        is freed
-
-The scsi_device structure has had reference counting infrastructure added.
-This effectively spreads the ownership of struct scsi_device instances
-across the various SCSI layers which use them. Previously such instances
-were exclusively owned by the mid level. See the access functions declared
-towards the end of include/scsi/scsi_device.h . If an LLD wants to keep
-a copy of a pointer to a scsi_device instance it should use scsi_device_get()
-to bump its reference count. When it is finished with the pointer it can
-use scsi_device_put() to decrement its reference count (and potentially
-delete it).
-
-^^ struct Scsi_Host actually has 2 reference counts which are manipulated
-in parallel by these functions.
-
-
-Conventions
-===========
-First, Linus Torvalds's thoughts on C coding style can be found in the
-Documentation/process/coding-style.rst file.
-
-Next, there is a movement to "outlaw" typedefs introducing synonyms for 
-struct tags. Both can be still found in the SCSI subsystem, but
-the typedefs have been moved to a single file, scsi_typedefs.h to
-make their future removal easier, for example: 
-"typedef struct scsi_cmnd Scsi_Cmnd;"
-
-Also, most C99 enhancements are encouraged to the extent they are supported
-by the relevant gcc compilers. So C99 style structure and array
-initializers are encouraged where appropriate. Don't go too far,
-VLAs are not properly supported yet.  An exception to this is the use of
-"//" style comments; /*...*/ comments are still preferred in Linux.
-
-Well written, tested and documented code, need not be re-formatted to
-comply with the above conventions. For example, the aic7xxx driver
-comes to Linux from FreeBSD and Adaptec's own labs. No doubt FreeBSD
-and Adaptec have their own coding conventions.
-
-
-Mid level supplied functions
-============================
-These functions are supplied by the SCSI mid level for use by LLDs.
-The names (i.e. entry points) of these functions are exported 
-so an LLD that is a module can access them. The kernel will
-arrange for the SCSI mid level to be loaded and initialized before any LLD
-is initialized. The functions below are listed alphabetically and their
-names all start with "scsi_".
-
-Summary:
-   scsi_add_device - creates new scsi device (lu) instance
-   scsi_add_host - perform sysfs registration and set up transport class
-   scsi_change_queue_depth - change the queue depth on a SCSI device
-   scsi_bios_ptable - return copy of block device's partition table
-   scsi_block_requests - prevent further commands being queued to given host
-   scsi_host_alloc - return a new scsi_host instance whose refcount==1
-   scsi_host_get - increments Scsi_Host instance's refcount
-   scsi_host_put - decrements Scsi_Host instance's refcount (free if 0)
-   scsi_partsize - parse partition table into cylinders, heads + sectors
-   scsi_register - create and register a scsi host adapter instance.
-   scsi_remove_device - detach and remove a SCSI device
-   scsi_remove_host - detach and remove all SCSI devices owned by host
-   scsi_report_bus_reset - report scsi _bus_ reset observed
-   scsi_scan_host - scan SCSI bus
-   scsi_track_queue_full - track successive QUEUE_FULL events 
-   scsi_unblock_requests - allow further commands to be queued to given host
-   scsi_unregister - [calls scsi_host_put()]
-
-
-Details:
-
-/**
- * scsi_add_device - creates new scsi device (lu) instance
- * @shost:   pointer to scsi host instance
- * @channel: channel number (rarely other than 0)
- * @id:      target id number
- * @lun:     logical unit number
- *
- *      Returns pointer to new struct scsi_device instance or 
- *      ERR_PTR(-ENODEV) (or some other bent pointer) if something is
- *      wrong (e.g. no lu responds at given address)
- *
- *      Might block: yes
- *
- *      Notes: This call is usually performed internally during a scsi
- *      bus scan when an HBA is added (i.e. scsi_scan_host()). So it
- *      should only be called if the HBA becomes aware of a new scsi
- *      device (lu) after scsi_scan_host() has completed. If successful
- *      this call can lead to slave_alloc() and slave_configure() callbacks
- *      into the LLD.
- *
- *      Defined in: drivers/scsi/scsi_scan.c
- **/
-struct scsi_device * scsi_add_device(struct Scsi_Host *shost, 
-                                     unsigned int channel,
-                                     unsigned int id, unsigned int lun)
-
-
-/**
- * scsi_add_host - perform sysfs registration and set up transport class
- * @shost:   pointer to scsi host instance
- * @dev:     pointer to struct device of type scsi class
- *
- *      Returns 0 on success, negative errno of failure (e.g. -ENOMEM)
- *
- *      Might block: no
- *
- *      Notes: Only required in "hotplug initialization model" after a
- *      successful call to scsi_host_alloc().  This function does not
- *	scan the bus; this can be done by calling scsi_scan_host() or
- *	in some other transport-specific way.  The LLD must set up
- *	the transport template before calling this function and may only
- *	access the transport class data after this function has been called.
- *
- *      Defined in: drivers/scsi/hosts.c
- **/
-int scsi_add_host(struct Scsi_Host *shost, struct device * dev)
-
-
-/**
- * scsi_change_queue_depth - allow LLD to change queue depth on a SCSI device
- * @sdev:       pointer to SCSI device to change queue depth on
- * @tags        Number of tags allowed if tagged queuing enabled,
- *              or number of commands the LLD can queue up
- *              in non-tagged mode (as per cmd_per_lun).
- *
- *      Returns nothing
- *
- *      Might block: no
- *
- *      Notes: Can be invoked any time on a SCSI device controlled by this
- *      LLD. [Specifically during and after slave_configure() and prior to
- *      slave_destroy().] Can safely be invoked from interrupt code.
- *
- *      Defined in: drivers/scsi/scsi.c [see source code for more notes]
- *
- **/
-int scsi_change_queue_depth(struct scsi_device *sdev, int tags)
-
-
-/**
- * scsi_bios_ptable - return copy of block device's partition table
- * @dev:        pointer to block device
- *
- *      Returns pointer to partition table, or NULL for failure
- *
- *      Might block: yes
- *
- *      Notes: Caller owns memory returned (free with kfree() )
- *
- *      Defined in: drivers/scsi/scsicam.c
- **/
-unsigned char *scsi_bios_ptable(struct block_device *dev)
-
-
-/**
- * scsi_block_requests - prevent further commands being queued to given host
- *
- * @shost: pointer to host to block commands on
- *
- *      Returns nothing
- *
- *      Might block: no
- *
- *      Notes: There is no timer nor any other means by which the requests
- *      get unblocked other than the LLD calling scsi_unblock_requests().
- *
- *      Defined in: drivers/scsi/scsi_lib.c
-**/
-void scsi_block_requests(struct Scsi_Host * shost)
-
-
-/**
- * scsi_host_alloc - create a scsi host adapter instance and perform basic
- *                   initialization.
- * @sht:        pointer to scsi host template
- * @privsize:   extra bytes to allocate in hostdata array (which is the
- *              last member of the returned Scsi_Host instance)
- *
- *      Returns pointer to new Scsi_Host instance or NULL on failure
- *
- *      Might block: yes
- *
- *      Notes: When this call returns to the LLD, the SCSI bus scan on
- *      this host has _not_ yet been done.
- *      The hostdata array (by default zero length) is a per host scratch 
- *      area for the LLD's exclusive use.
- *      Both associated refcounting objects have their refcount set to 1.
- *      Full registration (in sysfs) and a bus scan are performed later when
- *      scsi_add_host() and scsi_scan_host() are called.
- *
- *      Defined in: drivers/scsi/hosts.c .
- **/
-struct Scsi_Host * scsi_host_alloc(struct scsi_host_template * sht,
-                                   int privsize)
-
-
-/**
- * scsi_host_get - increment Scsi_Host instance refcount
- * @shost:   pointer to struct Scsi_Host instance
- *
- *      Returns nothing
- *
- *      Might block: currently may block but may be changed to not block
- *
- *      Notes: Actually increments the counts in two sub-objects
- *
- *      Defined in: drivers/scsi/hosts.c
- **/
-void scsi_host_get(struct Scsi_Host *shost)
-
-
-/**
- * scsi_host_put - decrement Scsi_Host instance refcount, free if 0
- * @shost:   pointer to struct Scsi_Host instance
- *
- *      Returns nothing
- *
- *      Might block: currently may block but may be changed to not block
- *
- *      Notes: Actually decrements the counts in two sub-objects. If the
- *      latter refcount reaches 0, the Scsi_Host instance is freed.
- *      The LLD need not worry exactly when the Scsi_Host instance is
- *      freed, it just shouldn't access the instance after it has balanced
- *      out its refcount usage.
- *
- *      Defined in: drivers/scsi/hosts.c
- **/
-void scsi_host_put(struct Scsi_Host *shost)
-
-
-/**
- * scsi_partsize - parse partition table into cylinders, heads + sectors
- * @buf: pointer to partition table
- * @capacity: size of (total) disk in 512 byte sectors
- * @cyls: outputs number of cylinders calculated via this pointer
- * @hds: outputs number of heads calculated via this pointer
- * @secs: outputs number of sectors calculated via this pointer
- *
- *      Returns 0 on success, -1 on failure
- *
- *      Might block: no
- *
- *      Notes: Caller owns memory returned (free with kfree() )
- *
- *      Defined in: drivers/scsi/scsicam.c
- **/
-int scsi_partsize(unsigned char *buf, unsigned long capacity,
-                  unsigned int *cyls, unsigned int *hds, unsigned int *secs)
-
-
-/**
- * scsi_register - create and register a scsi host adapter instance.
- * @sht:        pointer to scsi host template
- * @privsize:   extra bytes to allocate in hostdata array (which is the
- *              last member of the returned Scsi_Host instance)
- *
- *      Returns pointer to new Scsi_Host instance or NULL on failure
- *
- *      Might block: yes
- *
- *      Notes: When this call returns to the LLD, the SCSI bus scan on
- *      this host has _not_ yet been done.
- *      The hostdata array (by default zero length) is a per host scratch 
- *      area for the LLD.
- *
- *      Defined in: drivers/scsi/hosts.c .
- **/
-struct Scsi_Host * scsi_register(struct scsi_host_template * sht,
-                                 int privsize)
-
-
-/**
- * scsi_remove_device - detach and remove a SCSI device
- * @sdev:      a pointer to a scsi device instance
- *
- *      Returns value: 0 on success, -EINVAL if device not attached
- *
- *      Might block: yes
- *
- *      Notes: If an LLD becomes aware that a scsi device (lu) has
- *      been removed but its host is still present then it can request
- *      the removal of that scsi device. If successful this call will
- *      lead to the slave_destroy() callback being invoked. sdev is an 
- *      invalid pointer after this call.
- *
- *      Defined in: drivers/scsi/scsi_sysfs.c .
- **/
-int scsi_remove_device(struct scsi_device *sdev)
-
-
-/**
- * scsi_remove_host - detach and remove all SCSI devices owned by host
- * @shost:      a pointer to a scsi host instance
- *
- *      Returns value: 0 on success, 1 on failure (e.g. LLD busy ??)
- *
- *      Might block: yes
- *
- *      Notes: Should only be invoked if the "hotplug initialization
- *      model" is being used. It should be called _prior_ to  
- *      scsi_unregister().
- *
- *      Defined in: drivers/scsi/hosts.c .
- **/
-int scsi_remove_host(struct Scsi_Host *shost)
-
-
-/**
- * scsi_report_bus_reset - report scsi _bus_ reset observed
- * @shost: a pointer to a scsi host involved
- * @channel: channel (within) host on which scsi bus reset occurred
- *
- *      Returns nothing
- *
- *      Might block: no
- *
- *      Notes: This only needs to be called if the reset is one which
- *      originates from an unknown location.  Resets originated by the 
- *      mid level itself don't need to call this, but there should be 
- *      no harm.  The main purpose of this is to make sure that a
- *      CHECK_CONDITION is properly treated.
- *
- *      Defined in: drivers/scsi/scsi_error.c .
- **/
-void scsi_report_bus_reset(struct Scsi_Host * shost, int channel)
-
-
-/**
- * scsi_scan_host - scan SCSI bus
- * @shost: a pointer to a scsi host instance
- *
- *	Might block: yes
- *
- *	Notes: Should be called after scsi_add_host()
- *
- *	Defined in: drivers/scsi/scsi_scan.c
- **/
-void scsi_scan_host(struct Scsi_Host *shost)
-
-
-/**
- * scsi_track_queue_full - track successive QUEUE_FULL events on given
- *                      device to determine if and when there is a need
- *                      to adjust the queue depth on the device.
- * @sdev:  pointer to SCSI device instance
- * @depth: Current number of outstanding SCSI commands on this device,
- *         not counting the one returned as QUEUE_FULL.
- *
- *      Returns 0  - no change needed
- *              >0 - adjust queue depth to this new depth
- *              -1 - drop back to untagged operation using host->cmd_per_lun
- *                   as the untagged command depth
- *
- *      Might block: no
- *
- *      Notes: LLDs may call this at any time and we will do "The Right
- *              Thing"; interrupt context safe. 
- *
- *      Defined in: drivers/scsi/scsi.c .
- **/
-int scsi_track_queue_full(struct scsi_device *sdev, int depth)
-
-
-/**
- * scsi_unblock_requests - allow further commands to be queued to given host
- *
- * @shost: pointer to host to unblock commands on
- *
- *      Returns nothing
- *
- *      Might block: no
- *
- *      Defined in: drivers/scsi/scsi_lib.c .
-**/
-void scsi_unblock_requests(struct Scsi_Host * shost)
-
-
-/**
- * scsi_unregister - unregister and free memory used by host instance
- * @shp:        pointer to scsi host instance to unregister.
- *
- *      Returns nothing
- *
- *      Might block: no
- *
- *      Notes: Should not be invoked if the "hotplug initialization
- *      model" is being used. Called internally by exit_this_scsi_driver()
- *      in the "passive initialization model". Hence a LLD has no need to
- *      call this function directly.
- *
- *      Defined in: drivers/scsi/hosts.c .
- **/
-void scsi_unregister(struct Scsi_Host * shp)
-
-
-
-
-Interface Functions
-===================
-Interface functions are supplied (defined) by LLDs and their function
-pointers are placed in an instance of struct scsi_host_template which
-is passed to scsi_host_alloc() [or scsi_register() / init_this_scsi_driver()].
-Some are mandatory. Interface functions should be declared static. The
-accepted convention is that driver "xyz" will declare its slave_configure() 
-function as:
-    static int xyz_slave_configure(struct scsi_device * sdev);
-and so forth for all interface functions listed below.
-
-A pointer to this function should be placed in the 'slave_configure' member
-of a "struct scsi_host_template" instance. A pointer to such an instance
-should be passed to the mid level's scsi_host_alloc() [or scsi_register() /
-init_this_scsi_driver()].
-
-The interface functions are also described in the include/scsi/scsi_host.h
-file immediately above their definition point in "struct scsi_host_template".
-In some cases more detail is given in scsi_host.h than below.
-
-The interface functions are listed below in alphabetical order.
-
-Summary:
-   bios_param - fetch head, sector, cylinder info for a disk
-   eh_timed_out - notify the host that a command timer expired
-   eh_abort_handler - abort given command
-   eh_bus_reset_handler - issue SCSI bus reset
-   eh_device_reset_handler - issue SCSI device reset
-   eh_host_reset_handler - reset host (host bus adapter)
-   info - supply information about given host
-   ioctl - driver can respond to ioctls
-   proc_info - supports /proc/scsi/{driver_name}/{host_no}
-   queuecommand - queue scsi command, invoke 'done' on completion
-   slave_alloc - prior to any commands being sent to a new device 
-   slave_configure - driver fine tuning for given device after attach
-   slave_destroy - given device is about to be shut down
-
-
-Details:
-
-/**
- *      bios_param - fetch head, sector, cylinder info for a disk
- *      @sdev: pointer to scsi device context (defined in 
- *             include/scsi/scsi_device.h)
- *      @bdev: pointer to block device context (defined in fs.h)
- *      @capacity:  device size (in 512 byte sectors)
- *      @params: three element array to place output:
- *              params[0] number of heads (max 255)
- *              params[1] number of sectors (max 63)
- *              params[2] number of cylinders 
- *
- *      Return value is ignored
- *
- *      Locks: none
- *
- *      Calling context: process (sd)
- *
- *      Notes: an arbitrary geometry (based on READ CAPACITY) is used
- *      if this function is not provided. The params array is
- *      pre-initialized with made up values just in case this function 
- *      doesn't output anything.
- *
- *      Optionally defined in: LLD
- **/
-    int bios_param(struct scsi_device * sdev, struct block_device *bdev,
-                   sector_t capacity, int params[3])
-
-
-/**
- *      eh_timed_out - The timer for the command has just fired
- *      @scp: identifies command timing out
- *
- *      Returns:
- *
- *      EH_HANDLED:             I fixed the error, please complete the command
- *      EH_RESET_TIMER:         I need more time, reset the timer and
- *                              begin counting again
- *      EH_NOT_HANDLED          Begin normal error recovery
- *
- *
- *      Locks: None held
- *
- *      Calling context: interrupt
- *
- *      Notes: This is to give the LLD an opportunity to do local recovery.
- *      This recovery is limited to determining if the outstanding command
- *      will ever complete.  You may not abort and restart the command from
- *      this callback.
- *
- *      Optionally defined in: LLD
- **/
-     int eh_timed_out(struct scsi_cmnd * scp)
-
-
-/**
- *      eh_abort_handler - abort command associated with scp
- *      @scp: identifies command to be aborted
- *
- *      Returns SUCCESS if command aborted else FAILED
- *
- *      Locks: None held
- *
- *      Calling context: kernel thread
- *
- *      Notes: If 'no_async_abort' is defined this callback
- *  	will be invoked from scsi_eh thread. No other commands
- *	will then be queued on current host during eh.
- *	Otherwise it will be called whenever scsi_times_out()
- *      is called due to a command timeout.
- *
- *      Optionally defined in: LLD
- **/
-     int eh_abort_handler(struct scsi_cmnd * scp)
-
-
-/**
- *      eh_bus_reset_handler - issue SCSI bus reset
- *      @scp: SCSI bus that contains this device should be reset
- *
- *      Returns SUCCESS if command aborted else FAILED
- *
- *      Locks: None held
- *
- *      Calling context: kernel thread
- *
- *      Notes: Invoked from scsi_eh thread. No other commands will be
- *      queued on current host during eh.
- *
- *      Optionally defined in: LLD
- **/
-     int eh_bus_reset_handler(struct scsi_cmnd * scp)
-
-
-/**
- *      eh_device_reset_handler - issue SCSI device reset
- *      @scp: identifies SCSI device to be reset
- *
- *      Returns SUCCESS if command aborted else FAILED
- *
- *      Locks: None held
- *
- *      Calling context: kernel thread
- *
- *      Notes: Invoked from scsi_eh thread. No other commands will be
- *      queued on current host during eh.
- *
- *      Optionally defined in: LLD
- **/
-     int eh_device_reset_handler(struct scsi_cmnd * scp)
-
-
-/**
- *      eh_host_reset_handler - reset host (host bus adapter)
- *      @scp: SCSI host that contains this device should be reset
- *
- *      Returns SUCCESS if command aborted else FAILED
- *
- *      Locks: None held
- *
- *      Calling context: kernel thread
- *
- *      Notes: Invoked from scsi_eh thread. No other commands will be
- *      queued on current host during eh. 
- *      With the default eh_strategy in place, if none of the _abort_, 
- *      _device_reset_, _bus_reset_ or this eh handler function are 
- *      defined (or they all return FAILED) then the device in question 
- *      will be set offline whenever eh is invoked.
- *
- *      Optionally defined in: LLD
- **/
-     int eh_host_reset_handler(struct scsi_cmnd * scp)
-
-
-/**
- *      info - supply information about given host: driver name plus data
- *             to distinguish given host
- *      @shp: host to supply information about
- *
- *      Return ASCII null terminated string. [This driver is assumed to
- *      manage the memory pointed to and maintain it, typically for the
- *      lifetime of this host.]
- *
- *      Locks: none
- *
- *      Calling context: process
- *
- *      Notes: Often supplies PCI or ISA information such as IO addresses
- *      and interrupt numbers. If not supplied struct Scsi_Host::name used
- *      instead. It is assumed the returned information fits on one line 
- *      (i.e. does not included embedded newlines).
- *      The SCSI_IOCTL_PROBE_HOST ioctl yields the string returned by this
- *      function (or struct Scsi_Host::name if this function is not
- *      available).
- *      In a similar manner, init_this_scsi_driver() outputs to the console
- *      each host's "info" (or name) for the driver it is registering.
- *      Also if proc_info() is not supplied, the output of this function
- *      is used instead.
- *
- *      Optionally defined in: LLD
- **/
-    const char * info(struct Scsi_Host * shp)
-
-
-/**
- *      ioctl - driver can respond to ioctls
- *      @sdp: device that ioctl was issued for
- *      @cmd: ioctl number
- *      @arg: pointer to read or write data from. Since it points to
- *            user space, should use appropriate kernel functions
- *            (e.g. copy_from_user() ). In the Unix style this argument
- *            can also be viewed as an unsigned long.
- *
- *      Returns negative "errno" value when there is a problem. 0 or a
- *      positive value indicates success and is returned to the user space.
- *
- *      Locks: none
- *
- *      Calling context: process
- *
- *      Notes: The SCSI subsystem uses a "trickle down" ioctl model.
- *      The user issues an ioctl() against an upper level driver
- *      (e.g. /dev/sdc) and if the upper level driver doesn't recognize
- *      the 'cmd' then it is passed to the SCSI mid level. If the SCSI
- *      mid level does not recognize it, then the LLD that controls
- *      the device receives the ioctl. According to recent Unix standards
- *      unsupported ioctl() 'cmd' numbers should return -ENOTTY.
- *
- *      Optionally defined in: LLD
- **/
-    int ioctl(struct scsi_device *sdp, int cmd, void *arg)
-
-
-/**
- *      proc_info - supports /proc/scsi/{driver_name}/{host_no}
- *      @buffer: anchor point to output to (0==writeto1_read0) or fetch from
- *               (1==writeto1_read0).
- *      @start: where "interesting" data is written to. Ignored when
- *              1==writeto1_read0.
- *      @offset: offset within buffer 0==writeto1_read0 is actually
- *               interested in. Ignored when 1==writeto1_read0 .
- *      @length: maximum (or actual) extent of buffer
- *      @host_no: host number of interest (struct Scsi_Host::host_no)
- *      @writeto1_read0: 1 -> data coming from user space towards driver
- *                            (e.g. "echo some_string > /proc/scsi/xyz/2")
- *                       0 -> user what data from this driver
- *                            (e.g. "cat /proc/scsi/xyz/2")
- *
- *      Returns length when 1==writeto1_read0. Otherwise number of chars
- *      output to buffer past offset.
- *
- *      Locks: none held
- *
- *      Calling context: process
- *
- *      Notes: Driven from scsi_proc.c which interfaces to proc_fs. proc_fs
- *      support can now be configured out of the scsi subsystem.
- *
- *      Optionally defined in: LLD
- **/
-    int proc_info(char * buffer, char ** start, off_t offset, 
-                  int length, int host_no, int writeto1_read0)
-
-
-/**
- *      queuecommand - queue scsi command, invoke scp->scsi_done on completion
- *      @shost: pointer to the scsi host object
- *      @scp: pointer to scsi command object
- *
- *      Returns 0 on success.
- *
- *      If there's a failure, return either:
- *
- *      SCSI_MLQUEUE_DEVICE_BUSY if the device queue is full, or
- *      SCSI_MLQUEUE_HOST_BUSY if the entire host queue is full
- *
- *      On both of these returns, the mid-layer will requeue the I/O
- *
- *      - if the return is SCSI_MLQUEUE_DEVICE_BUSY, only that particular
- *      device will be paused, and it will be unpaused when a command to
- *      the device returns (or after a brief delay if there are no more
- *      outstanding commands to it).  Commands to other devices continue
- *      to be processed normally.
- *
- *      - if the return is SCSI_MLQUEUE_HOST_BUSY, all I/O to the host
- *      is paused and will be unpaused when any command returns from
- *      the host (or after a brief delay if there are no outstanding
- *      commands to the host).
- *
- *      For compatibility with earlier versions of queuecommand, any
- *      other return value is treated the same as
- *      SCSI_MLQUEUE_HOST_BUSY.
- *
- *      Other types of errors that are detected immediately may be
- *      flagged by setting scp->result to an appropriate value,
- *      invoking the scp->scsi_done callback, and then returning 0
- *      from this function. If the command is not performed
- *      immediately (and the LLD is starting (or will start) the given
- *      command) then this function should place 0 in scp->result and
- *      return 0.
- *
- *      Command ownership.  If the driver returns zero, it owns the
- *      command and must take responsibility for ensuring the
- *      scp->scsi_done callback is executed.  Note: the driver may
- *      call scp->scsi_done before returning zero, but after it has
- *      called scp->scsi_done, it may not return any value other than
- *      zero.  If the driver makes a non-zero return, it must not
- *      execute the command's scsi_done callback at any time.
- *
- *      Locks: up to and including 2.6.36, struct Scsi_Host::host_lock
- *             held on entry (with "irqsave") and is expected to be
- *             held on return. From 2.6.37 onwards, queuecommand is
- *             called without any locks held.
- *
- *      Calling context: in interrupt (soft irq) or process context
- *
- *      Notes: This function should be relatively fast. Normally it
- *      will not wait for IO to complete. Hence the scp->scsi_done
- *      callback is invoked (often directly from an interrupt service
- *      routine) some time after this function has returned. In some
- *      cases (e.g. pseudo adapter drivers that manufacture the
- *      response to a SCSI INQUIRY) the scp->scsi_done callback may be
- *      invoked before this function returns.  If the scp->scsi_done
- *      callback is not invoked within a certain period the SCSI mid
- *      level will commence error processing.  If a status of CHECK
- *      CONDITION is placed in "result" when the scp->scsi_done
- *      callback is invoked, then the LLD driver should perform
- *      autosense and fill in the struct scsi_cmnd::sense_buffer
- *      array. The scsi_cmnd::sense_buffer array is zeroed prior to
- *      the mid level queuing a command to an LLD.
- *
- *      Defined in: LLD
- **/
-    int queuecommand(struct Scsi_Host *shost, struct scsi_cmnd * scp)
-
-
-/**
- *      slave_alloc -   prior to any commands being sent to a new device 
- *                      (i.e. just prior to scan) this call is made
- *      @sdp: pointer to new device (about to be scanned)
- *
- *      Returns 0 if ok. Any other return is assumed to be an error and
- *      the device is ignored.
- *
- *      Locks: none
- *
- *      Calling context: process
- *
- *      Notes: Allows the driver to allocate any resources for a device
- *      prior to its initial scan. The corresponding scsi device may not
- *      exist but the mid level is just about to scan for it (i.e. send
- *      and INQUIRY command plus ...). If a device is found then
- *      slave_configure() will be called while if a device is not found
- *      slave_destroy() is called.
- *      For more details see the include/scsi/scsi_host.h file.
- *
- *      Optionally defined in: LLD
- **/
-    int slave_alloc(struct scsi_device *sdp)
-
-
-/**
- *      slave_configure - driver fine tuning for given device just after it
- *                     has been first scanned (i.e. it responded to an
- *                     INQUIRY)
- *      @sdp: device that has just been attached
- *
- *      Returns 0 if ok. Any other return is assumed to be an error and
- *      the device is taken offline. [offline devices will _not_ have
- *      slave_destroy() called on them so clean up resources.]
- *
- *      Locks: none
- *
- *      Calling context: process
- *
- *      Notes: Allows the driver to inspect the response to the initial
- *      INQUIRY done by the scanning code and take appropriate action.
- *      For more details see the include/scsi/scsi_host.h file.
- *
- *      Optionally defined in: LLD
- **/
-    int slave_configure(struct scsi_device *sdp)
-
-
-/**
- *      slave_destroy - given device is about to be shut down. All
- *                      activity has ceased on this device.
- *      @sdp: device that is about to be shut down
- *
- *      Returns nothing
- *
- *      Locks: none
- *
- *      Calling context: process
- *
- *      Notes: Mid level structures for given device are still in place
- *      but are about to be torn down. Any per device resources allocated
- *      by this driver for given device should be freed now. No further
- *      commands will be sent for this sdp instance. [However the device
- *      could be re-attached in the future in which case a new instance
- *      of struct scsi_device would be supplied by future slave_alloc()
- *      and slave_configure() calls.]
- *
- *      Optionally defined in: LLD
- **/
-    void slave_destroy(struct scsi_device *sdp)
-
-
-
-Data Structures
-===============
-struct scsi_host_template
--------------------------
-There is one "struct scsi_host_template" instance per LLD ***. It is
-typically initialized as a file scope static in a driver's header file. That
-way members that are not explicitly initialized will be set to 0 or NULL.
-Member of interest:
-    name         - name of driver (may contain spaces, please limit to
-                   less than 80 characters)
-    proc_name    - name used in "/proc/scsi/<proc_name>/<host_no>" and
-                   by sysfs in one of its "drivers" directories. Hence
-                   "proc_name" should only contain characters acceptable
-                   to a Unix file name.
-   (*queuecommand)() - primary callback that the mid level uses to inject
-                   SCSI commands into an LLD.
-The structure is defined and commented in include/scsi/scsi_host.h
-
-*** In extreme situations a single driver may have several instances
-    if it controls several different classes of hardware (e.g. an LLD
-    that handles both ISA and PCI cards and has a separate instance of
-    struct scsi_host_template for each class).
-
-struct Scsi_Host
-----------------
-There is one struct Scsi_Host instance per host (HBA) that an LLD
-controls. The struct Scsi_Host structure has many members in common
-with "struct scsi_host_template". When a new struct Scsi_Host instance
-is created (in scsi_host_alloc() in hosts.c) those common members are
-initialized from the driver's struct scsi_host_template instance. Members
-of interest:
-    host_no      - system wide unique number that is used for identifying
-                   this host. Issued in ascending order from 0.
-    can_queue    - must be greater than 0; do not send more than can_queue
-                   commands to the adapter.
-    this_id      - scsi id of host (scsi initiator) or -1 if not known
-    sg_tablesize - maximum scatter gather elements allowed by host.
-                   Set this to SG_ALL or less to avoid chained SG lists.
-                   Must be at least 1.
-    max_sectors  - maximum number of sectors (usually 512 bytes) allowed
-                   in a single SCSI command. The default value of 0 leads
-                   to a setting of SCSI_DEFAULT_MAX_SECTORS (defined in
-                   scsi_host.h) which is currently set to 1024. So for a
-                   disk the maximum transfer size is 512 KB when max_sectors
-                   is not defined. Note that this size may not be sufficient
-                   for disk firmware uploads.
-    cmd_per_lun  - maximum number of commands that can be queued on devices
-                   controlled by the host. Overridden by LLD calls to
-                   scsi_change_queue_depth().
-    unchecked_isa_dma - 1=>only use bottom 16 MB of ram (ISA DMA addressing
-                   restriction), 0=>can use full 32 bit (or better) DMA
-                   address space
-    no_async_abort - 1=>Asynchronous aborts are not supported
-                     0=>Timed-out commands will be aborted asynchronously
-    hostt        - pointer to driver's struct scsi_host_template from which
-                   this struct Scsi_Host instance was spawned
-    hostt->proc_name  - name of LLD. This is the driver name that sysfs uses
-    transportt   - pointer to driver's struct scsi_transport_template instance
-                   (if any). FC and SPI transports currently supported.
-    sh_list      - a double linked list of pointers to all struct Scsi_Host
-                   instances (currently ordered by ascending host_no)
-    my_devices   - a double linked list of pointers to struct scsi_device 
-                   instances that belong to this host.
-    hostdata[0]  - area reserved for LLD at end of struct Scsi_Host. Size
-                   is set by the second argument (named 'xtr_bytes') to
-                   scsi_host_alloc() or scsi_register().
-    vendor_id    - a unique value that identifies the vendor supplying
-                   the LLD for the Scsi_Host.  Used most often in validating
-                   vendor-specific message requests.  Value consists of an
-                   identifier type and a vendor-specific value.
-                   See scsi_netlink.h for a description of valid formats.
-
-The scsi_host structure is defined in include/scsi/scsi_host.h
-
-struct scsi_device
-------------------
-Generally, there is one instance of this structure for each SCSI logical unit
-on a host. Scsi devices connected to a host are uniquely identified by a
-channel number, target id and logical unit number (lun).
-The structure is defined in include/scsi/scsi_device.h
-
-struct scsi_cmnd
-----------------
-Instances of this structure convey SCSI commands to the LLD and responses
-back to the mid level. The SCSI mid level will ensure that no more SCSI
-commands become queued against the LLD than are indicated by
-scsi_change_queue_depth() (or struct Scsi_Host::cmd_per_lun). There will
-be at least one instance of struct scsi_cmnd available for each SCSI device.
-Members of interest:
-    cmnd         - array containing SCSI command
-    cmnd_len     - length (in bytes) of SCSI command
-    sc_data_direction - direction of data transfer in data phase. See
-                "enum dma_data_direction" in include/linux/dma-mapping.h
-    request_bufflen - number of data bytes to transfer (0 if no data phase)
-    use_sg       - ==0 -> no scatter gather list, hence transfer data
-                          to/from request_buffer
-                 - >0 ->  scatter gather list (actually an array) in
-                          request_buffer with use_sg elements
-    request_buffer - either contains data buffer or scatter gather list
-                     depending on the setting of use_sg. Scatter gather
-                     elements are defined by 'struct scatterlist' found
-                     in include/linux/scatterlist.h .
-    done         - function pointer that should be invoked by LLD when the
-                   SCSI command is completed (successfully or otherwise).
-                   Should only be called by an LLD if the LLD has accepted
-                   the command (i.e. queuecommand() returned or will return
-                   0). The LLD may invoke 'done'  prior to queuecommand()
-                   finishing.
-    result       - should be set by LLD prior to calling 'done'. A value
-                   of 0 implies a successfully completed command (and all
-                   data (if any) has been transferred to or from the SCSI
-                   target device). 'result' is a 32 bit unsigned integer that
-                   can be viewed as 4 related bytes. The SCSI status value is
-                   in the LSB. See include/scsi/scsi.h status_byte(),
-                   msg_byte(), host_byte() and driver_byte() macros and
-                   related constants.
-    sense_buffer - an array (maximum size: SCSI_SENSE_BUFFERSIZE bytes) that
-                   should be written when the SCSI status (LSB of 'result')
-                   is set to CHECK_CONDITION (2). When CHECK_CONDITION is
-                   set, if the top nibble of sense_buffer[0] has the value 7
-                   then the mid level will assume the sense_buffer array
-                   contains a valid SCSI sense buffer; otherwise the mid
-                   level will issue a REQUEST_SENSE SCSI command to
-                   retrieve the sense buffer. The latter strategy is error
-                   prone in the presence of command queuing so the LLD should
-                   always "auto-sense".
-    device       - pointer to scsi_device object that this command is
-                   associated with.
-    resid        - an LLD should set this signed integer to the requested
-                   transfer length (i.e. 'request_bufflen') less the number
-                   of bytes that are actually transferred. 'resid' is
-                   preset to 0 so an LLD can ignore it if it cannot detect
-                   underruns (overruns should be rare). If possible an LLD
-                   should set 'resid' prior to invoking 'done'. The most
-                   interesting case is data transfers from a SCSI target
-                   device (e.g. READs) that underrun.
-    underflow    - LLD should place (DID_ERROR << 16) in 'result' if
-                   actual number of bytes transferred is less than this
-                   figure. Not many LLDs implement this check and some that
-                   do just output an error message to the log rather than
-                   report a DID_ERROR. Better for an LLD to implement
-                   'resid'.
-
-It is recommended that a LLD set 'resid' on data transfers from a SCSI
-target device (e.g. READs). It is especially important that 'resid' is set
-when such data transfers have sense keys of MEDIUM ERROR and HARDWARE ERROR
-(and possibly RECOVERED ERROR). In these cases if a LLD is in doubt how much
-data has been received then the safest approach is to indicate no bytes have
-been received. For example: to indicate that no valid data has been received
-a LLD might use these helpers:
-    scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
-where 'SCpnt' is a pointer to a scsi_cmnd object. To indicate only three 512
-bytes blocks has been received 'resid' could be set like this:
-    scsi_set_resid(SCpnt, scsi_bufflen(SCpnt) - (3 * 512));
-
-The scsi_cmnd structure is defined in include/scsi/scsi_cmnd.h
-
-
-Locks
-=====
-Each struct Scsi_Host instance has a spin_lock called struct 
-Scsi_Host::default_lock which is initialized in scsi_host_alloc() [found in 
-hosts.c]. Within the same function the struct Scsi_Host::host_lock pointer
-is initialized to point at default_lock.  Thereafter lock and unlock
-operations performed by the mid level use the struct Scsi_Host::host_lock
-pointer.  Previously drivers could override the host_lock pointer but
-this is not allowed anymore.
-
-
-Autosense
-=========
-Autosense (or auto-sense) is defined in the SAM-2 document as "the
-automatic return of sense data to the application client coincident
-with the completion of a SCSI command" when a status of CHECK CONDITION
-occurs. LLDs should perform autosense. This should be done when the LLD
-detects a CHECK CONDITION status by either: 
-    a) instructing the SCSI protocol (e.g. SCSI Parallel Interface (SPI))
-       to perform an extra data in phase on such responses
-    b) or, the LLD issuing a REQUEST SENSE command itself
-
-Either way, when a status of CHECK CONDITION is detected, the mid level
-decides whether the LLD has performed autosense by checking struct 
-scsi_cmnd::sense_buffer[0] . If this byte has an upper nibble of 7 (or 0xf)
-then autosense is assumed to have taken place. If it has another value (and
-this byte is initialized to 0 before each command) then the mid level will
-issue a REQUEST SENSE command.
-
-In the presence of queued commands the "nexus" that maintains sense
-buffer data from the command that failed until a following REQUEST SENSE
-may get out of synchronization. This is why it is best for the LLD
-to perform autosense.
-
-
-Changes since lk 2.4 series
-===========================
-io_request_lock has been replaced by several finer grained locks. The lock 
-relevant to LLDs is struct Scsi_Host::host_lock and there is
-one per SCSI host.
-
-The older error handling mechanism has been removed. This means the
-LLD interface functions abort() and reset() have been removed.
-The struct scsi_host_template::use_new_eh_code flag has been removed.
-
-In the 2.4 series the SCSI subsystem configuration descriptions were 
-aggregated with the configuration descriptions from all other Linux 
-subsystems in the Documentation/Configure.help file. In the 2.6 series, 
-the SCSI subsystem now has its own (much smaller) drivers/scsi/Kconfig
-file that contains both configuration and help information.
-
-struct SHT has been renamed to struct scsi_host_template.
-
-Addition of the "hotplug initialization model" and many extra functions
-to support it.
-
-
-Credits
-=======
-The following people have contributed to this document:
-        Mike Anderson <andmike at us dot ibm dot com>
-        James Bottomley <James dot Bottomley at hansenpartnership dot com>
-        Patrick Mansfield <patmans at us dot ibm dot com> 
-        Christoph Hellwig <hch at infradead dot org>
-        Doug Ledford <dledford at redhat dot com>
-        Andries Brouwer <Andries dot Brouwer at cwi dot nl>
-        Randy Dunlap <rdunlap at xenotime dot net>
-        Alan Stern <stern at rowland dot harvard dot edu>
-
-
-Douglas Gilbert
-dgilbert at interlog dot com
-21st September 2004
diff --git a/scripts/documentation-file-ref-check b/scripts/documentation-file-ref-check
index 7784c54aa38b..df8b22112287 100755
--- a/scripts/documentation-file-ref-check
+++ b/scripts/documentation-file-ref-check
@@ -12,7 +12,7 @@ use Getopt::Long qw(:config no_auto_abbrev);
 # to mention a past documentation file, for example, to give credits for
 # the original work.
 my %false_positives = (
-	"Documentation/scsi/scsi_mid_low_api.txt" => "Documentation/Configure.help",
+	"Documentation/scsi/scsi_mid_low_api.rst" => "Documentation/Configure.help",
 	"drivers/vhost/vhost.c" => "Documentation/virtual/lguest/lguest.c",
 );
 
-- 
cgit v1.2.3


From b4490c5c4e023f09b7d27c9a9d3e7ad7d09ea6bf Mon Sep 17 00:00:00 2001
From: Carlos Neira <cneirabustos@gmail.com>
Date: Wed, 4 Mar 2020 17:41:56 -0300
Subject: bpf: Added new helper bpf_get_ns_current_pid_tgid

New bpf helper bpf_get_ns_current_pid_tgid,
This helper will return pid and tgid from current task
which namespace matches dev_t and inode number provided,
this will allows us to instrument a process inside a container.

Signed-off-by: Carlos Neira <cneirabustos@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200304204157.58695-3-cneirabustos@gmail.com
---
 include/linux/bpf.h            |  1 +
 include/uapi/linux/bpf.h       | 20 ++++++++++++++++++-
 kernel/bpf/core.c              |  1 +
 kernel/bpf/helpers.c           | 45 ++++++++++++++++++++++++++++++++++++++++++
 kernel/trace/bpf_trace.c       |  2 ++
 scripts/bpf_helpers_doc.py     |  1 +
 tools/include/uapi/linux/bpf.h | 20 ++++++++++++++++++-
 7 files changed, 88 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 4fd91b7c95ea..4ec835334a1f 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1497,6 +1497,7 @@ extern const struct bpf_func_proto bpf_strtol_proto;
 extern const struct bpf_func_proto bpf_strtoul_proto;
 extern const struct bpf_func_proto bpf_tcp_sock_proto;
 extern const struct bpf_func_proto bpf_jiffies64_proto;
+extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
 
 /* Shared helpers among cBPF and eBPF. */
 void bpf_user_rnd_init_once(void);
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 40b2d9476268..15b239da775b 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -2914,6 +2914,19 @@ union bpf_attr {
  *		of sizeof(struct perf_branch_entry).
  *
  *		**-ENOENT** if architecture does not support branch records.
+ *
+ * int bpf_get_ns_current_pid_tgid(u64 dev, u64 ino, struct bpf_pidns_info *nsdata, u32 size)
+ *	Description
+ *		Returns 0 on success, values for *pid* and *tgid* as seen from the current
+ *		*namespace* will be returned in *nsdata*.
+ *
+ *		On failure, the returned value is one of the following:
+ *
+ *		**-EINVAL** if dev and inum supplied don't match dev_t and inode number
+ *              with nsfs of current task, or if dev conversion to dev_t lost high bits.
+ *
+ *		**-ENOENT** if pidns does not exists for the current task.
+ *
  */
 #define __BPF_FUNC_MAPPER(FN)		\
 	FN(unspec),			\
@@ -3035,7 +3048,8 @@ union bpf_attr {
 	FN(tcp_send_ack),		\
 	FN(send_signal_thread),		\
 	FN(jiffies64),			\
-	FN(read_branch_records),
+	FN(read_branch_records),	\
+	FN(get_ns_current_pid_tgid),
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
  * function eBPF program intends to call
@@ -3829,4 +3843,8 @@ struct bpf_sockopt {
 	__s32	retval;
 };
 
+struct bpf_pidns_info {
+	__u32 pid;
+	__u32 tgid;
+};
 #endif /* _UAPI__LINUX_BPF_H__ */
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 973a20d49749..0f9ca46e1978 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -2149,6 +2149,7 @@ const struct bpf_func_proto bpf_get_current_uid_gid_proto __weak;
 const struct bpf_func_proto bpf_get_current_comm_proto __weak;
 const struct bpf_func_proto bpf_get_current_cgroup_id_proto __weak;
 const struct bpf_func_proto bpf_get_local_storage_proto __weak;
+const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto __weak;
 
 const struct bpf_func_proto * __weak bpf_get_trace_printk_proto(void)
 {
diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index d8b7b110a1c5..01878db15eaf 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -12,6 +12,8 @@
 #include <linux/filter.h>
 #include <linux/ctype.h>
 #include <linux/jiffies.h>
+#include <linux/pid_namespace.h>
+#include <linux/proc_ns.h>
 
 #include "../../lib/kstrtox.h"
 
@@ -499,3 +501,46 @@ const struct bpf_func_proto bpf_strtoul_proto = {
 	.arg4_type	= ARG_PTR_TO_LONG,
 };
 #endif
+
+BPF_CALL_4(bpf_get_ns_current_pid_tgid, u64, dev, u64, ino,
+	   struct bpf_pidns_info *, nsdata, u32, size)
+{
+	struct task_struct *task = current;
+	struct pid_namespace *pidns;
+	int err = -EINVAL;
+
+	if (unlikely(size != sizeof(struct bpf_pidns_info)))
+		goto clear;
+
+	if (unlikely((u64)(dev_t)dev != dev))
+		goto clear;
+
+	if (unlikely(!task))
+		goto clear;
+
+	pidns = task_active_pid_ns(task);
+	if (unlikely(!pidns)) {
+		err = -ENOENT;
+		goto clear;
+	}
+
+	if (!ns_match(&pidns->ns, (dev_t)dev, ino))
+		goto clear;
+
+	nsdata->pid = task_pid_nr_ns(task, pidns);
+	nsdata->tgid = task_tgid_nr_ns(task, pidns);
+	return 0;
+clear:
+	memset((void *)nsdata, 0, (size_t) size);
+	return err;
+}
+
+const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto = {
+	.func		= bpf_get_ns_current_pid_tgid,
+	.gpl_only	= false,
+	.ret_type	= RET_INTEGER,
+	.arg1_type	= ARG_ANYTHING,
+	.arg2_type	= ARG_ANYTHING,
+	.arg3_type      = ARG_PTR_TO_UNINIT_MEM,
+	.arg4_type      = ARG_CONST_SIZE,
+};
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 6a490d8ce9de..b5071c7e93ca 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -843,6 +843,8 @@ tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 		return &bpf_send_signal_thread_proto;
 	case BPF_FUNC_perf_event_read_value:
 		return &bpf_perf_event_read_value_proto;
+	case BPF_FUNC_get_ns_current_pid_tgid:
+		return &bpf_get_ns_current_pid_tgid_proto;
 	default:
 		return NULL;
 	}
diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py
index cebed6fb5bbb..c1e2b5410faa 100755
--- a/scripts/bpf_helpers_doc.py
+++ b/scripts/bpf_helpers_doc.py
@@ -435,6 +435,7 @@ class PrinterHelpers(Printer):
             'struct bpf_fib_lookup',
             'struct bpf_perf_event_data',
             'struct bpf_perf_event_value',
+            'struct bpf_pidns_info',
             'struct bpf_sock',
             'struct bpf_sock_addr',
             'struct bpf_sock_ops',
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 40b2d9476268..15b239da775b 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -2914,6 +2914,19 @@ union bpf_attr {
  *		of sizeof(struct perf_branch_entry).
  *
  *		**-ENOENT** if architecture does not support branch records.
+ *
+ * int bpf_get_ns_current_pid_tgid(u64 dev, u64 ino, struct bpf_pidns_info *nsdata, u32 size)
+ *	Description
+ *		Returns 0 on success, values for *pid* and *tgid* as seen from the current
+ *		*namespace* will be returned in *nsdata*.
+ *
+ *		On failure, the returned value is one of the following:
+ *
+ *		**-EINVAL** if dev and inum supplied don't match dev_t and inode number
+ *              with nsfs of current task, or if dev conversion to dev_t lost high bits.
+ *
+ *		**-ENOENT** if pidns does not exists for the current task.
+ *
  */
 #define __BPF_FUNC_MAPPER(FN)		\
 	FN(unspec),			\
@@ -3035,7 +3048,8 @@ union bpf_attr {
 	FN(tcp_send_ack),		\
 	FN(send_signal_thread),		\
 	FN(jiffies64),			\
-	FN(read_branch_records),
+	FN(read_branch_records),	\
+	FN(get_ns_current_pid_tgid),
 
 /* integer value in 'imm' field of BPF_CALL instruction selects which helper
  * function eBPF program intends to call
@@ -3829,4 +3843,8 @@ struct bpf_sockopt {
 	__s32	retval;
 };
 
+struct bpf_pidns_info {
+	__u32 pid;
+	__u32 tgid;
+};
 #endif /* _UAPI__LINUX_BPF_H__ */
-- 
cgit v1.2.3


From 9dffecc1339b1f446213a9ba2f19579d9db4d7c7 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 4 Mar 2020 12:20:38 +0900
Subject: kbuild: allow to run dt_binding_check without kernel configuration

The dt_binding_check target is located outside of the
'ifneq ($(dtstree),) ... endif' block.

So, you can run 'make dt_binding_check' on any architecture.
This makes a perfect sense because the dt-schema is arch-agnostic.

The only one problem I see is that scripts/dtc/dtc is not always built.
For example, ARCH=x86 defconfig does not define CONFIG_DTC. Kbuild
descends into scripts/dtc/ with doing nothing. Then, it fails to build
*.example.dt.yaml files.

Let's build scripts/dtc/dtc forcibly when running dt_binding_check.

The dt-schema does not depend on any CONFIG option either, so you
should be able to run dt_binding_check without the .config file.

Going forward, you can directly run 'make dt_binding_check' in a
pristine source tree.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 Makefile             | 2 +-
 scripts/dtc/Makefile | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index 9387c96ec874..96f6ca3004cf 100644
--- a/Makefile
+++ b/Makefile
@@ -255,7 +255,7 @@ clean-targets := %clean mrproper cleandocs
 no-dot-config-targets := $(clean-targets) \
 			 cscope gtags TAGS tags help% %docs check% coccicheck \
 			 $(version_h) headers headers_% archheaders archscripts \
-			 %asm-generic kernelversion %src-pkg
+			 %asm-generic kernelversion %src-pkg dt_binding_check
 no-sync-config-targets := $(no-dot-config-targets) install %install \
 			   kernelrelease
 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
index 3acbb410904c..2f3c3a7e1620 100644
--- a/scripts/dtc/Makefile
+++ b/scripts/dtc/Makefile
@@ -1,8 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0
 # scripts/dtc makefile
 
-hostprogs		:= dtc
-always-$(CONFIG_DTC)	:= $(hostprogs)
+hostprogs			:= dtc
+always-$(CONFIG_DTC)		+= $(hostprogs)
+always-$(CHECK_DT_BINDING)	+= $(hostprogs)
 
 dtc-objs	:= dtc.o flattree.o fstree.o data.o livetree.o treesource.o \
 		   srcpos.o checks.o util.o
-- 
cgit v1.2.3


From 93c95e526a4ef00eb3d5a1e0920ba5a22f32e40d Mon Sep 17 00:00:00 2001
From: Jessica Yu <jeyu@kernel.org>
Date: Fri, 6 Mar 2020 17:02:05 +0100
Subject: modpost: rework and consolidate logging interface

Rework modpost's logging interface by consolidating merror(), warn(), and
fatal() to use a single function, modpost_log(). Introduce different
logging levels (WARN, ERROR, FATAL) as well. The purpose of this cleanup is
to reduce code duplication when deciding whether or not to warn or error
out based on a condition.

Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/mod/modpost.c | 69 ++++++++++++++++++++++-----------------------------
 scripts/mod/modpost.h | 14 ++++++++---
 2 files changed, 40 insertions(+), 43 deletions(-)

(limited to 'scripts')

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 7edfdb2f4497..a6f7b309ac45 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -51,41 +51,33 @@ enum export {
 
 #define MODULE_NAME_LEN (64 - sizeof(Elf_Addr))
 
-#define PRINTF __attribute__ ((format (printf, 1, 2)))
-
-PRINTF void fatal(const char *fmt, ...)
+void __attribute__((format(printf, 2, 3)))
+modpost_log(enum loglevel loglevel, const char *fmt, ...)
 {
 	va_list arglist;
 
-	fprintf(stderr, "FATAL: ");
-
-	va_start(arglist, fmt);
-	vfprintf(stderr, fmt, arglist);
-	va_end(arglist);
-
-	exit(1);
-}
-
-PRINTF void warn(const char *fmt, ...)
-{
-	va_list arglist;
+	switch (loglevel) {
+	case LOG_WARN:
+		fprintf(stderr, "WARNING: ");
+		break;
+	case LOG_ERROR:
+		fprintf(stderr, "ERROR: ");
+		break;
+	case LOG_FATAL:
+		fprintf(stderr, "FATAL: ");
+		break;
+	default: /* invalid loglevel, ignore */
+		break;
+	}
 
-	fprintf(stderr, "WARNING: ");
+	fprintf(stderr, "modpost: ");
 
 	va_start(arglist, fmt);
 	vfprintf(stderr, fmt, arglist);
 	va_end(arglist);
-}
-
-PRINTF void merror(const char *fmt, ...)
-{
-	va_list arglist;
-
-	fprintf(stderr, "ERROR: ");
 
-	va_start(arglist, fmt);
-	vfprintf(stderr, fmt, arglist);
-	va_end(arglist);
+	if (loglevel == LOG_FATAL)
+		exit(1);
 }
 
 static inline bool strends(const char *str, const char *postfix)
@@ -113,7 +105,7 @@ static int is_vmlinux(const char *modname)
 void *do_nofail(void *ptr, const char *expr)
 {
 	if (!ptr)
-		fatal("modpost: Memory allocation failure: %s.\n", expr);
+		fatal("Memory allocation failure: %s.\n", expr);
 
 	return ptr;
 }
@@ -2021,7 +2013,7 @@ static void read_symbols(const char *modname)
 
 	license = get_modinfo(&info, "license");
 	if (!license && !is_vmlinux(modname))
-		warn("modpost: missing MODULE_LICENSE() in %s\n"
+		warn("missing MODULE_LICENSE() in %s\n"
 		     "see include/linux/module.h for "
 		     "more information\n", modname);
 	while (license) {
@@ -2152,15 +2144,15 @@ static void check_for_gpl_usage(enum export exp, const char *m, const char *s)
 
 	switch (exp) {
 	case export_gpl:
-		fatal("modpost: GPL-incompatible module %s%s "
+		fatal("GPL-incompatible module %s%s "
 		      "uses GPL-only symbol '%s'\n", m, e, s);
 		break;
 	case export_unused_gpl:
-		fatal("modpost: GPL-incompatible module %s%s "
+		fatal("GPL-incompatible module %s%s "
 		      "uses GPL-only symbol marked UNUSED '%s'\n", m, e, s);
 		break;
 	case export_gpl_future:
-		warn("modpost: GPL-incompatible module %s%s "
+		warn("GPL-incompatible module %s%s "
 		      "uses future GPL-only symbol '%s'\n", m, e, s);
 		break;
 	case export_plain:
@@ -2178,7 +2170,7 @@ static void check_for_unused(enum export exp, const char *m, const char *s)
 	switch (exp) {
 	case export_unused:
 	case export_unused_gpl:
-		warn("modpost: module %s%s "
+		warn("module %s%s "
 		      "uses symbol '%s' marked UNUSED\n", m, e, s);
 		break;
 	default:
@@ -2197,14 +2189,11 @@ static int check_exports(struct module *mod)
 		exp = find_symbol(s->name);
 		if (!exp || exp->module == mod) {
 			if (have_vmlinux && !s->weak) {
-				if (warn_unresolved) {
-					warn("\"%s\" [%s.ko] undefined!\n",
-					     s->name, mod->name);
-				} else {
-					merror("\"%s\" [%s.ko] undefined!\n",
-					       s->name, mod->name);
+				modpost_log(warn_unresolved ? LOG_WARN : LOG_ERROR,
+					    "\"%s\" [%s.ko] undefined!\n",
+					    s->name, mod->name);
+				if (!warn_unresolved)
 					err = 1;
-				}
 			}
 			continue;
 		}
@@ -2653,7 +2642,7 @@ int main(int argc, char **argv)
 	if (dump_write)
 		write_dump(dump_write);
 	if (sec_mismatch_count && sec_mismatch_fatal)
-		fatal("modpost: Section mismatches detected.\n"
+		fatal("Section mismatches detected.\n"
 		      "Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them.\n");
 	for (n = 0; n < SYMBOL_HASH_SIZE; n++) {
 		struct symbol *s;
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 64a82d2d85f6..60dca9b7106b 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -198,6 +198,14 @@ void *grab_file(const char *filename, unsigned long *size);
 char* get_next_line(unsigned long *pos, void *file, unsigned long size);
 void release_file(void *file, unsigned long size);
 
-void fatal(const char *fmt, ...);
-void warn(const char *fmt, ...);
-void merror(const char *fmt, ...);
+enum loglevel {
+	LOG_WARN,
+	LOG_ERROR,
+	LOG_FATAL
+};
+
+void modpost_log(enum loglevel loglevel, const char *fmt, ...);
+
+#define warn(fmt, args...)	modpost_log(LOG_WARN, fmt, ##args)
+#define merror(fmt, args...)	modpost_log(LOG_ERROR, fmt, ##args)
+#define fatal(fmt, args...)	modpost_log(LOG_FATAL, fmt, ##args)
-- 
cgit v1.2.3


From 54b778476941c768ef749803167dd21385c01038 Mon Sep 17 00:00:00 2001
From: Jessica Yu <jeyu@kernel.org>
Date: Fri, 6 Mar 2020 17:02:06 +0100
Subject: modpost: return error if module is missing ns imports and
 MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n

Currently when CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n, modpost
only warns when a module is missing namespace imports. Under this
configuration, such a module cannot be loaded into the kernel anyway, as
the module loader would reject it. We might as well return a build
error when a module is missing namespace imports under
CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS=n, so that the build
warning does not go ignored/unnoticed.

Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.modpost | 15 ++++++++-------
 scripts/mod/modpost.c    | 14 +++++++++++---
 2 files changed, 19 insertions(+), 10 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index b4d3f2d122ac..957eed6a17a5 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -46,13 +46,14 @@ include scripts/Kbuild.include
 kernelsymfile := $(objtree)/Module.symvers
 modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers
 
-MODPOST = scripts/mod/modpost						\
-	$(if $(CONFIG_MODVERSIONS),-m)					\
-	$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a)			\
-	$(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile)			\
-	$(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS)))	\
-	$(if $(KBUILD_EXTMOD),-o $(modulesymfile))			\
-	$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E)			\
+MODPOST = scripts/mod/modpost								\
+	$(if $(CONFIG_MODVERSIONS),-m)							\
+	$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a)					\
+	$(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile)					\
+	$(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS)))			\
+	$(if $(KBUILD_EXTMOD),-o $(modulesymfile))					\
+	$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E)					\
+	$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) 	\
 	$(if $(KBUILD_MODPOST_WARN),-w)
 
 ifdef MODPOST_VMLINUX
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index a6f7b309ac45..a3d8370f9544 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -39,6 +39,8 @@ static int sec_mismatch_count = 0;
 static int sec_mismatch_fatal = 0;
 /* ignore missing files */
 static int ignore_missing_files;
+/* If set to 1, only warn (instead of error) about missing ns imports */
+static int allow_missing_ns_imports;
 
 enum export {
 	export_plain,      export_unused,     export_gpl,
@@ -2205,8 +2207,11 @@ static int check_exports(struct module *mod)
 
 		if (exp->namespace &&
 		    !module_imports_namespace(mod, exp->namespace)) {
-			warn("module %s uses symbol %s from namespace %s, but does not import it.\n",
-			     basename, exp->name, exp->namespace);
+			modpost_log(allow_missing_ns_imports ? LOG_WARN : LOG_ERROR,
+				    "module %s uses symbol %s from namespace %s, but does not import it.\n",
+				    basename, exp->name, exp->namespace);
+			if (!allow_missing_ns_imports)
+				err = 1;
 			add_namespace(&mod->missing_namespaces, exp->namespace);
 		}
 
@@ -2549,7 +2554,7 @@ int main(int argc, char **argv)
 	struct ext_sym_list *extsym_iter;
 	struct ext_sym_list *extsym_start = NULL;
 
-	while ((opt = getopt(argc, argv, "i:e:mnsT:o:awEd:")) != -1) {
+	while ((opt = getopt(argc, argv, "i:e:mnsT:o:awENd:")) != -1) {
 		switch (opt) {
 		case 'i':
 			kernel_read = optarg;
@@ -2587,6 +2592,9 @@ int main(int argc, char **argv)
 		case 'E':
 			sec_mismatch_fatal = 1;
 			break;
+		case 'N':
+			allow_missing_ns_imports = 1;
+			break;
 		case 'd':
 			missing_namespace_deps = optarg;
 			break;
-- 
cgit v1.2.3


From def2fbffe62c00c330c7f41584a356001179c59c Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Mon, 2 Mar 2020 15:23:39 +0900
Subject: kconfig: allow symbols implied by y to become m

The 'imply' keyword restricts a symbol to y or n, excluding m
when it is implied by y. This is the original behavior since
commit 237e3ad0f195 ("Kconfig: Introduce the "imply" keyword").

However, the author of this feature, Nicolas Pitre, stated that
the 'imply' keyword should not impose any restrictions.
(https://lkml.org/lkml/2020/2/19/714)

I agree, and want to get rid of this tricky behavior.

Suggested-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
---
 Documentation/kbuild/kconfig-language.rst | 12 +++++++++++-
 scripts/kconfig/symbol.c                  |  5 +----
 2 files changed, 12 insertions(+), 5 deletions(-)

(limited to 'scripts')

diff --git a/Documentation/kbuild/kconfig-language.rst b/Documentation/kbuild/kconfig-language.rst
index d0111dd26410..d4d988aea679 100644
--- a/Documentation/kbuild/kconfig-language.rst
+++ b/Documentation/kbuild/kconfig-language.rst
@@ -173,7 +173,7 @@ applicable everywhere (see syntax).
 	===		===		=============	==============
 	n		y		n		N/m/y
 	m		y		m		M/y/n
-	y		y		y		Y/n
+	y		y		y		Y/m/n
 	y		n		*		N
 	===		===		=============	==============
 
@@ -181,6 +181,16 @@ applicable everywhere (see syntax).
   ability to hook into a secondary subsystem while allowing the user to
   configure that subsystem out without also having to unset these drivers.
 
+  Note: If the combination of FOO=y and BAR=m causes a link error,
+  you can guard the function call with IS_REACHABLE()::
+
+	foo_init()
+	{
+		if (IS_REACHABLE(CONFIG_BAZ))
+			baz_register(&foo);
+		...
+	}
+
 - limiting menu display: "visible if" <expr>
 
   This attribute is only applicable to menu blocks, if the condition is
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index 8d38b700b314..b101ef3c377a 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -401,8 +401,7 @@ void sym_calc_value(struct symbol *sym)
 				sym_warn_unmet_dep(sym);
 			newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
 		}
-		if (newval.tri == mod &&
-		    (sym_get_type(sym) == S_BOOLEAN || sym->implied.tri == yes))
+		if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
 			newval.tri = yes;
 		break;
 	case S_STRING:
@@ -484,8 +483,6 @@ bool sym_tristate_within_range(struct symbol *sym, tristate val)
 		return false;
 	if (sym->visible <= sym->rev_dep.tri)
 		return false;
-	if (sym->implied.tri == yes && val == mod)
-		return false;
 	if (sym_is_choice_value(sym) && sym->visible == yes)
 		return val == yes;
 	return val >= sym->rev_dep.tri && val <= sym->visible;
-- 
cgit v1.2.3


From 3a9dd3ecb207b2cb8a4aabd12d20e43fa360b66d Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Mon, 2 Mar 2020 15:23:40 +0900
Subject: kconfig: make 'imply' obey the direct dependency

The 'imply' statement may create unmet direct dependency when the
implied symbol depends on m.

[Test Code]

  config FOO
          tristate "foo"
          imply BAZ

  config BAZ
          tristate "baz"
          depends on BAR

  config BAR
          def_tristate m

  config MODULES
          def_bool y
          option modules

If you set FOO=y, BAZ is also promoted to y, which results in the
following .config file:

  CONFIG_FOO=y
  CONFIG_BAZ=y
  CONFIG_BAR=m
  CONFIG_MODULES=y

This does not meet the dependency 'BAZ depends on BAR'.

Unlike 'select', what is worse, Kconfig never shows the
'WARNING: unmet direct dependencies detected for ...' for this case.

Because 'imply' is considered to be weaker than 'depends on', Kconfig
should take the direct dependency into account.

For clarification, describe this case in kconfig-language.rst too.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 Documentation/kbuild/kconfig-language.rst | 15 +++++++++++++--
 scripts/kconfig/symbol.c                  |  4 +++-
 2 files changed, 16 insertions(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/Documentation/kbuild/kconfig-language.rst b/Documentation/kbuild/kconfig-language.rst
index d4d988aea679..a1601ec3317b 100644
--- a/Documentation/kbuild/kconfig-language.rst
+++ b/Documentation/kbuild/kconfig-language.rst
@@ -159,11 +159,11 @@ applicable everywhere (see syntax).
   Given the following example::
 
     config FOO
-	tristate
+	tristate "foo"
 	imply BAZ
 
     config BAZ
-	tristate
+	tristate "baz"
 	depends on BAR
 
   The following values are possible:
@@ -174,6 +174,9 @@ applicable everywhere (see syntax).
 	n		y		n		N/m/y
 	m		y		m		M/y/n
 	y		y		y		Y/m/n
+	n		m		n		N/m
+	m		m		m		M/n
+	y		m		n		M/n
 	y		n		*		N
 	===		===		=============	==============
 
@@ -191,6 +194,14 @@ applicable everywhere (see syntax).
 		...
 	}
 
+  Note: If the feature provided by BAZ is highly desirable for FOO,
+  FOO should imply not only BAZ, but also its dependency BAR::
+
+    config FOO
+	tristate "foo"
+	imply BAR
+	imply BAZ
+
 - limiting menu display: "visible if" <expr>
 
   This attribute is only applicable to menu blocks, if the condition is
diff --git a/scripts/kconfig/symbol.c b/scripts/kconfig/symbol.c
index b101ef3c377a..3dc81397d003 100644
--- a/scripts/kconfig/symbol.c
+++ b/scripts/kconfig/symbol.c
@@ -221,7 +221,7 @@ static void sym_calc_visibility(struct symbol *sym)
 		sym_set_changed(sym);
 	}
 	tri = no;
-	if (sym->implied.expr && sym->dir_dep.tri != no)
+	if (sym->implied.expr)
 		tri = expr_calc_value(sym->implied.expr);
 	if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
 		tri = yes;
@@ -394,6 +394,8 @@ void sym_calc_value(struct symbol *sym)
 				if (sym->implied.tri != no) {
 					sym->flags |= SYMBOL_WRITE;
 					newval.tri = EXPR_OR(newval.tri, sym->implied.tri);
+					newval.tri = EXPR_AND(newval.tri,
+							      sym->dir_dep.tri);
 				}
 			}
 		calc_newval:
-- 
cgit v1.2.3


From 78154212673308f6941dbd4ecefdca5a9db60e6e Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Fri, 13 Mar 2020 08:46:42 -0500
Subject: scripts/dtc: Remove unused makefile fragments

The Makefile.dtc and Makefile.libfdt fragments from upstream dtc aren't
used by the kernel build, so let's remove them and stop syncing them.

Signed-off-by: Rob Herring <robh@kernel.org>
---
 scripts/dtc/Makefile.dtc           | 23 -----------------------
 scripts/dtc/libfdt/Makefile.libfdt | 18 ------------------
 scripts/dtc/update-dtc-source.sh   |  4 ++--
 3 files changed, 2 insertions(+), 43 deletions(-)
 delete mode 100644 scripts/dtc/Makefile.dtc
 delete mode 100644 scripts/dtc/libfdt/Makefile.libfdt

(limited to 'scripts')

diff --git a/scripts/dtc/Makefile.dtc b/scripts/dtc/Makefile.dtc
deleted file mode 100644
index 9c467b096f03..000000000000
--- a/scripts/dtc/Makefile.dtc
+++ /dev/null
@@ -1,23 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
-# Makefile.dtc
-#
-# This is not a complete Makefile of itself.  Instead, it is designed to
-# be easily embeddable into other systems of Makefiles.
-#
-DTC_SRCS = \
-	checks.c \
-	data.c \
-	dtc.c \
-	flattree.c \
-	fstree.c \
-	livetree.c \
-	srcpos.c \
-	treesource.c \
-	util.c
-
-ifneq ($(NO_YAML),1)
-DTC_SRCS += yamltree.c
-endif
-
-DTC_GEN_SRCS = dtc-lexer.lex.c dtc-parser.tab.c
-DTC_OBJS = $(DTC_SRCS:%.c=%.o) $(DTC_GEN_SRCS:%.c=%.o)
diff --git a/scripts/dtc/libfdt/Makefile.libfdt b/scripts/dtc/libfdt/Makefile.libfdt
deleted file mode 100644
index e54639738c8e..000000000000
--- a/scripts/dtc/libfdt/Makefile.libfdt
+++ /dev/null
@@ -1,18 +0,0 @@
-# SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
-# Makefile.libfdt
-#
-# This is not a complete Makefile of itself.  Instead, it is designed to
-# be easily embeddable into other systems of Makefiles.
-#
-LIBFDT_soname = libfdt.$(SHAREDLIB_EXT).1
-LIBFDT_INCLUDES = fdt.h libfdt.h libfdt_env.h
-LIBFDT_VERSION = version.lds
-LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c fdt_empty_tree.c \
-	fdt_addresses.c fdt_overlay.c
-LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)
-LIBFDT_LIB = libfdt-$(DTC_VERSION).$(SHAREDLIB_EXT)
-
-libfdt_clean:
-	@$(VECHO) CLEAN "(libfdt)"
-	rm -f $(STD_CLEANFILES:%=$(LIBFDT_dir)/%)
-	rm -f $(LIBFDT_dir)/$(LIBFDT_soname)
diff --git a/scripts/dtc/update-dtc-source.sh b/scripts/dtc/update-dtc-source.sh
index 7dd29a0362b8..bc704e2a6a4a 100755
--- a/scripts/dtc/update-dtc-source.sh
+++ b/scripts/dtc/update-dtc-source.sh
@@ -32,9 +32,9 @@ DTC_UPSTREAM_PATH=`pwd`/../dtc
 DTC_LINUX_PATH=`pwd`/scripts/dtc
 
 DTC_SOURCE="checks.c data.c dtc.c dtc.h flattree.c fstree.c livetree.c srcpos.c \
-		srcpos.h treesource.c util.c util.h version_gen.h yamltree.c Makefile.dtc \
+		srcpos.h treesource.c util.c util.h version_gen.h yamltree.c \
 		dtc-lexer.l dtc-parser.y"
-LIBFDT_SOURCE="Makefile.libfdt fdt.c fdt.h fdt_addresses.c fdt_empty_tree.c \
+LIBFDT_SOURCE="fdt.c fdt.h fdt_addresses.c fdt_empty_tree.c \
 		fdt_overlay.c fdt_ro.c fdt_rw.c fdt_strerror.c fdt_sw.c \
 		fdt_wip.c libfdt.h libfdt_env.h libfdt_internal.h"
 
-- 
cgit v1.2.3


From d047cd8a2760f58d17b8ade21d2f15b818575abc Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Fri, 13 Mar 2020 08:56:58 -0500
Subject: scripts/dtc: Update to upstream version v1.6.0-2-g87a656ae5ff9

This adds the following commits from upstream:

87a656ae5ff9 check: Inform about missing ranges
73d6e9ecb417 libfdt: fix undefined behaviour in fdt_splice_()
2525da3dba9b Bump version to v1.6.0
62cb4ad286ff Execute tests on FreeBSD with Cirrus CI
1f9a41750883 tests: Allow running the testsuite on already installed binary / libraries
c5995ddf4c20 tests: Honour NO_YAML make variable
e4ce227e89d7 tests: Properly clean up .bak file from tests
9b75292c335c tests: Honour $(NO_PYTHON) flag from Makefile in run_tests.sh
6c253afd07d4 Encode $(NO_PYTHON) consistently with other variables
95ec8ef706bd tests: No need to explicitly pass $PYTHON from Make to run_tests.sh
2b5f62d109a2 tests: Let run_tests.sh run Python tests without Makefile assistance
76b43dcbd18a checks: Add 'dma-ranges' check
e5c92a4780c6 libfdt: Use VALID_INPUT for FDT_ERR_BADSTATE checks
e5cc26b68bc0 libfdt: Add support for disabling internal checks
28fd7590aad2 libfdt: Improve comments in some of the assumptions
fc207c32341b libfdt: Fix a few typos
0f61c72dedc4 libfdt: Allow exclusion of fdt_check_full()
f270f45fd5d2 libfdt: Add support for disabling ordering check/fixup
c18bae9a4c96 libfdt: Add support for disabling version checks
fc03c4a2e04e libfdt: Add support for disabling rollback handling
77563ae72b7c libfdt: Add support for disabling sanity checks
57bc6327b80b libfdt: Add support for disabling dtb checks
464962489dcc Add a way to control the level of checks in the code
0c5326cb2845 libfdt: De-inline fdt_header_size()
cc6a5a071504 Revert "yamltree: Ensure consistent bracketing of properties with phandles"
0e9225eb0dfe Remove redundant YYLOC global declaration
cab09eedd644 Move -DNO_VALGRIND into CPPFLAGS
0eb1cb0b531e Makefile: pass $(CFLAGS) also during dependency generation

Signed-off-by: Rob Herring <robh@kernel.org>
---
 scripts/dtc/checks.c                 |  25 +++---
 scripts/dtc/dtc-lexer.l              |   1 -
 scripts/dtc/libfdt/fdt.c             |  99 +++++++++++++++---------
 scripts/dtc/libfdt/fdt_ro.c          | 143 +++++++++++++----------------------
 scripts/dtc/libfdt/fdt_rw.c          |  42 ++++++----
 scripts/dtc/libfdt/fdt_sw.c          |  19 +++--
 scripts/dtc/libfdt/libfdt.h          |   9 ++-
 scripts/dtc/libfdt/libfdt_internal.h | 122 ++++++++++++++++++++++++++++++
 scripts/dtc/version_gen.h            |   2 +-
 9 files changed, 296 insertions(+), 166 deletions(-)

(limited to 'scripts')

diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index 756f0fa9203f..4b3c486f1399 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -352,7 +352,7 @@ static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
 			FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
 	} else {
 		if (unitname[0])
-			FAIL(c, dti, node, "node has a unit name, but no reg property");
+			FAIL(c, dti, node, "node has a unit name, but no reg or ranges property");
 	}
 }
 WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
@@ -765,13 +765,15 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
 {
 	struct property *prop;
 	int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
+	const char *ranges = c->data;
 
-	prop = get_property(node, "ranges");
+	prop = get_property(node, ranges);
 	if (!prop)
 		return;
 
 	if (!node->parent) {
-		FAIL_PROP(c, dti, node, prop, "Root node has a \"ranges\" property");
+		FAIL_PROP(c, dti, node, prop, "Root node has a \"%s\" property",
+			  ranges);
 		return;
 	}
 
@@ -783,23 +785,24 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
 
 	if (prop->val.len == 0) {
 		if (p_addr_cells != c_addr_cells)
-			FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
+			FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
 				  "#address-cells (%d) differs from %s (%d)",
-				  c_addr_cells, node->parent->fullpath,
+				  ranges, c_addr_cells, node->parent->fullpath,
 				  p_addr_cells);
 		if (p_size_cells != c_size_cells)
-			FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
+			FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
 				  "#size-cells (%d) differs from %s (%d)",
-				  c_size_cells, node->parent->fullpath,
+				  ranges, c_size_cells, node->parent->fullpath,
 				  p_size_cells);
 	} else if ((prop->val.len % entrylen) != 0) {
-		FAIL_PROP(c, dti, node, prop, "\"ranges\" property has invalid length (%d bytes) "
+		FAIL_PROP(c, dti, node, prop, "\"%s\" property has invalid length (%d bytes) "
 			  "(parent #address-cells == %d, child #address-cells == %d, "
-			  "#size-cells == %d)", prop->val.len,
+			  "#size-cells == %d)", ranges, prop->val.len,
 			  p_addr_cells, c_addr_cells, c_size_cells);
 	}
 }
-WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells);
+WARNING(ranges_format, check_ranges_format, "ranges", &addr_size_cells);
+WARNING(dma_ranges_format, check_ranges_format, "dma-ranges", &addr_size_cells);
 
 static const struct bus_type pci_bus = {
 	.name = "PCI",
@@ -1780,7 +1783,7 @@ static struct check *check_table[] = {
 	&property_name_chars_strict,
 	&node_name_chars_strict,
 
-	&addr_size_cells, &reg_format, &ranges_format,
+	&addr_size_cells, &reg_format, &ranges_format, &dma_ranges_format,
 
 	&unit_address_vs_reg,
 	&unit_address_format,
diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
index 5c6c3fd557d7..b3b7270300de 100644
--- a/scripts/dtc/dtc-lexer.l
+++ b/scripts/dtc/dtc-lexer.l
@@ -23,7 +23,6 @@ LINECOMMENT	"//".*\n
 #include "srcpos.h"
 #include "dtc-parser.tab.h"
 
-YYLTYPE yylloc;
 extern bool treesource_error;
 
 /* CAUTION: this will stop working if we ever use yyless() or yyunput() */
diff --git a/scripts/dtc/libfdt/fdt.c b/scripts/dtc/libfdt/fdt.c
index d6ce7c052dc8..c28fcc115771 100644
--- a/scripts/dtc/libfdt/fdt.c
+++ b/scripts/dtc/libfdt/fdt.c
@@ -19,15 +19,21 @@ int32_t fdt_ro_probe_(const void *fdt)
 {
 	uint32_t totalsize = fdt_totalsize(fdt);
 
+	if (can_assume(VALID_DTB))
+		return totalsize;
+
 	if (fdt_magic(fdt) == FDT_MAGIC) {
 		/* Complete tree */
-		if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
-			return -FDT_ERR_BADVERSION;
-		if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION)
-			return -FDT_ERR_BADVERSION;
+		if (!can_assume(LATEST)) {
+			if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
+				return -FDT_ERR_BADVERSION;
+			if (fdt_last_comp_version(fdt) >
+					FDT_LAST_SUPPORTED_VERSION)
+				return -FDT_ERR_BADVERSION;
+		}
 	} else if (fdt_magic(fdt) == FDT_SW_MAGIC) {
 		/* Unfinished sequential-write blob */
-		if (fdt_size_dt_struct(fdt) == 0)
+		if (!can_assume(VALID_INPUT) && fdt_size_dt_struct(fdt) == 0)
 			return -FDT_ERR_BADSTATE;
 	} else {
 		return -FDT_ERR_BADMAGIC;
@@ -70,44 +76,59 @@ size_t fdt_header_size_(uint32_t version)
 		return FDT_V17_SIZE;
 }
 
+size_t fdt_header_size(const void *fdt)
+{
+	return can_assume(LATEST) ? FDT_V17_SIZE :
+		fdt_header_size_(fdt_version(fdt));
+}
+
 int fdt_check_header(const void *fdt)
 {
 	size_t hdrsize;
 
 	if (fdt_magic(fdt) != FDT_MAGIC)
 		return -FDT_ERR_BADMAGIC;
+	if (!can_assume(LATEST)) {
+		if ((fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
+		    || (fdt_last_comp_version(fdt) >
+			FDT_LAST_SUPPORTED_VERSION))
+			return -FDT_ERR_BADVERSION;
+		if (fdt_version(fdt) < fdt_last_comp_version(fdt))
+			return -FDT_ERR_BADVERSION;
+	}
 	hdrsize = fdt_header_size(fdt);
-	if ((fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION)
-	    || (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION))
-		return -FDT_ERR_BADVERSION;
-	if (fdt_version(fdt) < fdt_last_comp_version(fdt))
-		return -FDT_ERR_BADVERSION;
-
-	if ((fdt_totalsize(fdt) < hdrsize)
-	    || (fdt_totalsize(fdt) > INT_MAX))
-		return -FDT_ERR_TRUNCATED;
+	if (!can_assume(VALID_DTB)) {
 
-	/* Bounds check memrsv block */
-	if (!check_off_(hdrsize, fdt_totalsize(fdt), fdt_off_mem_rsvmap(fdt)))
-		return -FDT_ERR_TRUNCATED;
+		if ((fdt_totalsize(fdt) < hdrsize)
+		    || (fdt_totalsize(fdt) > INT_MAX))
+			return -FDT_ERR_TRUNCATED;
 
-	/* Bounds check structure block */
-	if (fdt_version(fdt) < 17) {
+		/* Bounds check memrsv block */
 		if (!check_off_(hdrsize, fdt_totalsize(fdt),
-				fdt_off_dt_struct(fdt)))
+				fdt_off_mem_rsvmap(fdt)))
 			return -FDT_ERR_TRUNCATED;
-	} else {
+	}
+
+	if (!can_assume(VALID_DTB)) {
+		/* Bounds check structure block */
+		if (!can_assume(LATEST) && fdt_version(fdt) < 17) {
+			if (!check_off_(hdrsize, fdt_totalsize(fdt),
+					fdt_off_dt_struct(fdt)))
+				return -FDT_ERR_TRUNCATED;
+		} else {
+			if (!check_block_(hdrsize, fdt_totalsize(fdt),
+					  fdt_off_dt_struct(fdt),
+					  fdt_size_dt_struct(fdt)))
+				return -FDT_ERR_TRUNCATED;
+		}
+
+		/* Bounds check strings block */
 		if (!check_block_(hdrsize, fdt_totalsize(fdt),
-				  fdt_off_dt_struct(fdt),
-				  fdt_size_dt_struct(fdt)))
+				  fdt_off_dt_strings(fdt),
+				  fdt_size_dt_strings(fdt)))
 			return -FDT_ERR_TRUNCATED;
 	}
 
-	/* Bounds check strings block */
-	if (!check_block_(hdrsize, fdt_totalsize(fdt),
-			  fdt_off_dt_strings(fdt), fdt_size_dt_strings(fdt)))
-		return -FDT_ERR_TRUNCATED;
-
 	return 0;
 }
 
@@ -115,12 +136,13 @@ const void *fdt_offset_ptr(const void *fdt, int offset, unsigned int len)
 {
 	unsigned absoffset = offset + fdt_off_dt_struct(fdt);
 
-	if ((absoffset < offset)
-	    || ((absoffset + len) < absoffset)
-	    || (absoffset + len) > fdt_totalsize(fdt))
-		return NULL;
+	if (!can_assume(VALID_INPUT))
+		if ((absoffset < offset)
+		    || ((absoffset + len) < absoffset)
+		    || (absoffset + len) > fdt_totalsize(fdt))
+			return NULL;
 
-	if (fdt_version(fdt) >= 0x11)
+	if (can_assume(LATEST) || fdt_version(fdt) >= 0x11)
 		if (((offset + len) < offset)
 		    || ((offset + len) > fdt_size_dt_struct(fdt)))
 			return NULL;
@@ -137,7 +159,7 @@ uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
 
 	*nextoffset = -FDT_ERR_TRUNCATED;
 	tagp = fdt_offset_ptr(fdt, offset, FDT_TAGSIZE);
-	if (!tagp)
+	if (!can_assume(VALID_DTB) && !tagp)
 		return FDT_END; /* premature end */
 	tag = fdt32_to_cpu(*tagp);
 	offset += FDT_TAGSIZE;
@@ -149,18 +171,19 @@ uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
 		do {
 			p = fdt_offset_ptr(fdt, offset++, 1);
 		} while (p && (*p != '\0'));
-		if (!p)
+		if (!can_assume(VALID_DTB) && !p)
 			return FDT_END; /* premature end */
 		break;
 
 	case FDT_PROP:
 		lenp = fdt_offset_ptr(fdt, offset, sizeof(*lenp));
-		if (!lenp)
+		if (!can_assume(VALID_DTB) && !lenp)
 			return FDT_END; /* premature end */
 		/* skip-name offset, length and value */
 		offset += sizeof(struct fdt_property) - FDT_TAGSIZE
 			+ fdt32_to_cpu(*lenp);
-		if (fdt_version(fdt) < 0x10 && fdt32_to_cpu(*lenp) >= 8 &&
+		if (!can_assume(LATEST) &&
+		    fdt_version(fdt) < 0x10 && fdt32_to_cpu(*lenp) >= 8 &&
 		    ((offset - fdt32_to_cpu(*lenp)) % 8) != 0)
 			offset += 4;
 		break;
@@ -183,6 +206,8 @@ uint32_t fdt_next_tag(const void *fdt, int startoffset, int *nextoffset)
 
 int fdt_check_node_offset_(const void *fdt, int offset)
 {
+	if (can_assume(VALID_INPUT))
+		return offset;
 	if ((offset < 0) || (offset % FDT_TAGSIZE)
 	    || (fdt_next_tag(fdt, offset, &offset) != FDT_BEGIN_NODE))
 		return -FDT_ERR_BADOFFSET;
diff --git a/scripts/dtc/libfdt/fdt_ro.c b/scripts/dtc/libfdt/fdt_ro.c
index a5c2797cde65..e03570a56eb5 100644
--- a/scripts/dtc/libfdt/fdt_ro.c
+++ b/scripts/dtc/libfdt/fdt_ro.c
@@ -33,17 +33,26 @@ static int fdt_nodename_eq_(const void *fdt, int offset,
 
 const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
 {
-	int32_t totalsize = fdt_ro_probe_(fdt);
-	uint32_t absoffset = stroffset + fdt_off_dt_strings(fdt);
+	int32_t totalsize;
+	uint32_t absoffset;
 	size_t len;
 	int err;
 	const char *s, *n;
 
+	if (can_assume(VALID_INPUT)) {
+		s = (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
+
+		if (lenp)
+			*lenp = strlen(s);
+		return s;
+	}
+	totalsize = fdt_ro_probe_(fdt);
 	err = totalsize;
 	if (totalsize < 0)
 		goto fail;
 
 	err = -FDT_ERR_BADOFFSET;
+	absoffset = stroffset + fdt_off_dt_strings(fdt);
 	if (absoffset >= totalsize)
 		goto fail;
 	len = totalsize - absoffset;
@@ -51,7 +60,7 @@ const char *fdt_get_string(const void *fdt, int stroffset, int *lenp)
 	if (fdt_magic(fdt) == FDT_MAGIC) {
 		if (stroffset < 0)
 			goto fail;
-		if (fdt_version(fdt) >= 17) {
+		if (can_assume(LATEST) || fdt_version(fdt) >= 17) {
 			if (stroffset >= fdt_size_dt_strings(fdt))
 				goto fail;
 			if ((fdt_size_dt_strings(fdt) - stroffset) < len)
@@ -151,10 +160,13 @@ static const struct fdt_reserve_entry *fdt_mem_rsv(const void *fdt, int n)
 	int offset = n * sizeof(struct fdt_reserve_entry);
 	int absoffset = fdt_off_mem_rsvmap(fdt) + offset;
 
-	if (absoffset < fdt_off_mem_rsvmap(fdt))
-		return NULL;
-	if (absoffset > fdt_totalsize(fdt) - sizeof(struct fdt_reserve_entry))
-		return NULL;
+	if (!can_assume(VALID_INPUT)) {
+		if (absoffset < fdt_off_mem_rsvmap(fdt))
+			return NULL;
+		if (absoffset > fdt_totalsize(fdt) -
+		    sizeof(struct fdt_reserve_entry))
+			return NULL;
+	}
 	return fdt_mem_rsv_(fdt, n);
 }
 
@@ -164,7 +176,7 @@ int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)
 
 	FDT_RO_PROBE(fdt);
 	re = fdt_mem_rsv(fdt, n);
-	if (!re)
+	if (!can_assume(VALID_INPUT) && !re)
 		return -FDT_ERR_BADOFFSET;
 
 	*address = fdt64_ld(&re->address);
@@ -295,7 +307,7 @@ const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
 
 	nameptr = nh->name;
 
-	if (fdt_version(fdt) < 0x10) {
+	if (!can_assume(LATEST) && fdt_version(fdt) < 0x10) {
 		/*
 		 * For old FDT versions, match the naming conventions of V16:
 		 * give only the leaf name (after all /). The actual tree
@@ -346,7 +358,8 @@ static const struct fdt_property *fdt_get_property_by_offset_(const void *fdt,
 	int err;
 	const struct fdt_property *prop;
 
-	if ((err = fdt_check_prop_offset_(fdt, offset)) < 0) {
+	if (!can_assume(VALID_INPUT) &&
+	    (err = fdt_check_prop_offset_(fdt, offset)) < 0) {
 		if (lenp)
 			*lenp = err;
 		return NULL;
@@ -367,7 +380,7 @@ const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
 	/* Prior to version 16, properties may need realignment
 	 * and this API does not work. fdt_getprop_*() will, however. */
 
-	if (fdt_version(fdt) < 0x10) {
+	if (!can_assume(LATEST) && fdt_version(fdt) < 0x10) {
 		if (lenp)
 			*lenp = -FDT_ERR_BADVERSION;
 		return NULL;
@@ -388,7 +401,8 @@ static const struct fdt_property *fdt_get_property_namelen_(const void *fdt,
 	     (offset = fdt_next_property_offset(fdt, offset))) {
 		const struct fdt_property *prop;
 
-		if (!(prop = fdt_get_property_by_offset_(fdt, offset, lenp))) {
+		prop = fdt_get_property_by_offset_(fdt, offset, lenp);
+		if (!can_assume(LIBFDT_FLAWLESS) && !prop) {
 			offset = -FDT_ERR_INTERNAL;
 			break;
 		}
@@ -413,7 +427,7 @@ const struct fdt_property *fdt_get_property_namelen(const void *fdt,
 {
 	/* Prior to version 16, properties may need realignment
 	 * and this API does not work. fdt_getprop_*() will, however. */
-	if (fdt_version(fdt) < 0x10) {
+	if (!can_assume(LATEST) && fdt_version(fdt) < 0x10) {
 		if (lenp)
 			*lenp = -FDT_ERR_BADVERSION;
 		return NULL;
@@ -444,8 +458,8 @@ const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
 		return NULL;
 
 	/* Handle realignment */
-	if (fdt_version(fdt) < 0x10 && (poffset + sizeof(*prop)) % 8 &&
-	    fdt32_ld(&prop->len) >= 8)
+	if (!can_assume(LATEST) && fdt_version(fdt) < 0x10 &&
+	    (poffset + sizeof(*prop)) % 8 && fdt32_ld(&prop->len) >= 8)
 		return prop->data + 4;
 	return prop->data;
 }
@@ -461,19 +475,24 @@ const void *fdt_getprop_by_offset(const void *fdt, int offset,
 	if (namep) {
 		const char *name;
 		int namelen;
-		name = fdt_get_string(fdt, fdt32_ld(&prop->nameoff),
-				      &namelen);
-		if (!name) {
-			if (lenp)
-				*lenp = namelen;
-			return NULL;
+
+		if (!can_assume(VALID_INPUT)) {
+			name = fdt_get_string(fdt, fdt32_ld(&prop->nameoff),
+					      &namelen);
+			if (!name) {
+				if (lenp)
+					*lenp = namelen;
+				return NULL;
+			}
+			*namep = name;
+		} else {
+			*namep = fdt_string(fdt, fdt32_ld(&prop->nameoff));
 		}
-		*namep = name;
 	}
 
 	/* Handle realignment */
-	if (fdt_version(fdt) < 0x10 && (offset + sizeof(*prop)) % 8 &&
-	    fdt32_ld(&prop->len) >= 8)
+	if (!can_assume(LATEST) && fdt_version(fdt) < 0x10 &&
+	    (offset + sizeof(*prop)) % 8 && fdt32_ld(&prop->len) >= 8)
 		return prop->data + 4;
 	return prop->data;
 }
@@ -598,10 +617,12 @@ int fdt_supernode_atdepth_offset(const void *fdt, int nodeoffset,
 		}
 	}
 
-	if ((offset == -FDT_ERR_NOTFOUND) || (offset >= 0))
-		return -FDT_ERR_BADOFFSET;
-	else if (offset == -FDT_ERR_BADOFFSET)
-		return -FDT_ERR_BADSTRUCTURE;
+	if (!can_assume(VALID_INPUT)) {
+		if ((offset == -FDT_ERR_NOTFOUND) || (offset >= 0))
+			return -FDT_ERR_BADOFFSET;
+		else if (offset == -FDT_ERR_BADOFFSET)
+			return -FDT_ERR_BADSTRUCTURE;
+	}
 
 	return offset; /* error from fdt_next_node() */
 }
@@ -613,7 +634,8 @@ int fdt_node_depth(const void *fdt, int nodeoffset)
 
 	err = fdt_supernode_atdepth_offset(fdt, nodeoffset, 0, &nodedepth);
 	if (err)
-		return (err < 0) ? err : -FDT_ERR_INTERNAL;
+		return (can_assume(LIBFDT_FLAWLESS) || err < 0) ? err :
+			-FDT_ERR_INTERNAL;
 	return nodedepth;
 }
 
@@ -833,66 +855,3 @@ int fdt_node_offset_by_compatible(const void *fdt, int startoffset,
 
 	return offset; /* error from fdt_next_node() */
 }
-
-int fdt_check_full(const void *fdt, size_t bufsize)
-{
-	int err;
-	int num_memrsv;
-	int offset, nextoffset = 0;
-	uint32_t tag;
-	unsigned depth = 0;
-	const void *prop;
-	const char *propname;
-
-	if (bufsize < FDT_V1_SIZE)
-		return -FDT_ERR_TRUNCATED;
-	err = fdt_check_header(fdt);
-	if (err != 0)
-		return err;
-	if (bufsize < fdt_totalsize(fdt))
-		return -FDT_ERR_TRUNCATED;
-
-	num_memrsv = fdt_num_mem_rsv(fdt);
-	if (num_memrsv < 0)
-		return num_memrsv;
-
-	while (1) {
-		offset = nextoffset;
-		tag = fdt_next_tag(fdt, offset, &nextoffset);
-
-		if (nextoffset < 0)
-			return nextoffset;
-
-		switch (tag) {
-		case FDT_NOP:
-			break;
-
-		case FDT_END:
-			if (depth != 0)
-				return -FDT_ERR_BADSTRUCTURE;
-			return 0;
-
-		case FDT_BEGIN_NODE:
-			depth++;
-			if (depth > INT_MAX)
-				return -FDT_ERR_BADSTRUCTURE;
-			break;
-
-		case FDT_END_NODE:
-			if (depth == 0)
-				return -FDT_ERR_BADSTRUCTURE;
-			depth--;
-			break;
-
-		case FDT_PROP:
-			prop = fdt_getprop_by_offset(fdt, offset, &propname,
-						     &err);
-			if (!prop)
-				return err;
-			break;
-
-		default:
-			return -FDT_ERR_INTERNAL;
-		}
-	}
-}
diff --git a/scripts/dtc/libfdt/fdt_rw.c b/scripts/dtc/libfdt/fdt_rw.c
index 8795947c00dd..524b520c8486 100644
--- a/scripts/dtc/libfdt/fdt_rw.c
+++ b/scripts/dtc/libfdt/fdt_rw.c
@@ -24,14 +24,16 @@ static int fdt_blocks_misordered_(const void *fdt,
 
 static int fdt_rw_probe_(void *fdt)
 {
+	if (can_assume(VALID_DTB))
+		return 0;
 	FDT_RO_PROBE(fdt);
 
-	if (fdt_version(fdt) < 17)
+	if (!can_assume(LATEST) && fdt_version(fdt) < 17)
 		return -FDT_ERR_BADVERSION;
 	if (fdt_blocks_misordered_(fdt, sizeof(struct fdt_reserve_entry),
 				   fdt_size_dt_struct(fdt)))
 		return -FDT_ERR_BADLAYOUT;
-	if (fdt_version(fdt) > 17)
+	if (!can_assume(LATEST) && fdt_version(fdt) > 17)
 		fdt_set_version(fdt, 17);
 
 	return 0;
@@ -44,7 +46,7 @@ static int fdt_rw_probe_(void *fdt)
 			return err_; \
 	}
 
-static inline int fdt_data_size_(void *fdt)
+static inline unsigned int fdt_data_size_(void *fdt)
 {
 	return fdt_off_dt_strings(fdt) + fdt_size_dt_strings(fdt);
 }
@@ -52,15 +54,16 @@ static inline int fdt_data_size_(void *fdt)
 static int fdt_splice_(void *fdt, void *splicepoint, int oldlen, int newlen)
 {
 	char *p = splicepoint;
-	char *end = (char *)fdt + fdt_data_size_(fdt);
+	unsigned int dsize = fdt_data_size_(fdt);
+	size_t soff = p - (char *)fdt;
 
-	if (((p + oldlen) < p) || ((p + oldlen) > end))
+	if ((oldlen < 0) || (soff + oldlen < soff) || (soff + oldlen > dsize))
 		return -FDT_ERR_BADOFFSET;
-	if ((p < (char *)fdt) || ((end - oldlen + newlen) < (char *)fdt))
+	if ((p < (char *)fdt) || (dsize + newlen < oldlen))
 		return -FDT_ERR_BADOFFSET;
-	if ((end - oldlen + newlen) > ((char *)fdt + fdt_totalsize(fdt)))
+	if (dsize - oldlen + newlen > fdt_totalsize(fdt))
 		return -FDT_ERR_NOSPACE;
-	memmove(p + newlen, p + oldlen, end - p - oldlen);
+	memmove(p + newlen, p + oldlen, ((char *)fdt + dsize) - (p + oldlen));
 	return 0;
 }
 
@@ -112,6 +115,15 @@ static int fdt_splice_string_(void *fdt, int newlen)
 	return 0;
 }
 
+/**
+ * fdt_find_add_string_() - Find or allocate a string
+ *
+ * @fdt: pointer to the device tree to check/adjust
+ * @s: string to find/add
+ * @allocated: Set to 0 if the string was found, 1 if not found and so
+ *	allocated. Ignored if can_assume(NO_ROLLBACK)
+ * @return offset of string in the string table (whether found or added)
+ */
 static int fdt_find_add_string_(void *fdt, const char *s, int *allocated)
 {
 	char *strtab = (char *)fdt + fdt_off_dt_strings(fdt);
@@ -120,7 +132,8 @@ static int fdt_find_add_string_(void *fdt, const char *s, int *allocated)
 	int len = strlen(s) + 1;
 	int err;
 
-	*allocated = 0;
+	if (!can_assume(NO_ROLLBACK))
+		*allocated = 0;
 
 	p = fdt_find_string_(strtab, fdt_size_dt_strings(fdt), s);
 	if (p)
@@ -132,7 +145,8 @@ static int fdt_find_add_string_(void *fdt, const char *s, int *allocated)
 	if (err)
 		return err;
 
-	*allocated = 1;
+	if (!can_assume(NO_ROLLBACK))
+		*allocated = 1;
 
 	memcpy(new, s, len);
 	return (new - strtab);
@@ -206,7 +220,8 @@ static int fdt_add_property_(void *fdt, int nodeoffset, const char *name,
 
 	err = fdt_splice_struct_(fdt, *prop, 0, proplen);
 	if (err) {
-		if (allocated)
+		/* Delete the string if we failed to add it */
+		if (!can_assume(NO_ROLLBACK) && allocated)
 			fdt_del_last_string_(fdt, name);
 		return err;
 	}
@@ -411,7 +426,7 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
 	mem_rsv_size = (fdt_num_mem_rsv(fdt)+1)
 		* sizeof(struct fdt_reserve_entry);
 
-	if (fdt_version(fdt) >= 17) {
+	if (can_assume(LATEST) || fdt_version(fdt) >= 17) {
 		struct_size = fdt_size_dt_struct(fdt);
 	} else {
 		struct_size = 0;
@@ -421,7 +436,8 @@ int fdt_open_into(const void *fdt, void *buf, int bufsize)
 			return struct_size;
 	}
 
-	if (!fdt_blocks_misordered_(fdt, mem_rsv_size, struct_size)) {
+	if (can_assume(LIBFDT_ORDER) |
+	    !fdt_blocks_misordered_(fdt, mem_rsv_size, struct_size)) {
 		/* no further work necessary */
 		err = fdt_move(fdt, buf, bufsize);
 		if (err)
diff --git a/scripts/dtc/libfdt/fdt_sw.c b/scripts/dtc/libfdt/fdt_sw.c
index 76bea22f734f..26759d5dfb8c 100644
--- a/scripts/dtc/libfdt/fdt_sw.c
+++ b/scripts/dtc/libfdt/fdt_sw.c
@@ -12,10 +12,13 @@
 
 static int fdt_sw_probe_(void *fdt)
 {
-	if (fdt_magic(fdt) == FDT_MAGIC)
-		return -FDT_ERR_BADSTATE;
-	else if (fdt_magic(fdt) != FDT_SW_MAGIC)
-		return -FDT_ERR_BADMAGIC;
+	if (!can_assume(VALID_INPUT)) {
+		if (fdt_magic(fdt) == FDT_MAGIC)
+			return -FDT_ERR_BADSTATE;
+		else if (fdt_magic(fdt) != FDT_SW_MAGIC)
+			return -FDT_ERR_BADMAGIC;
+	}
+
 	return 0;
 }
 
@@ -38,7 +41,7 @@ static int fdt_sw_probe_memrsv_(void *fdt)
 	if (err)
 		return err;
 
-	if (fdt_off_dt_strings(fdt) != 0)
+	if (!can_assume(VALID_INPUT) && fdt_off_dt_strings(fdt) != 0)
 		return -FDT_ERR_BADSTATE;
 	return 0;
 }
@@ -64,7 +67,8 @@ static int fdt_sw_probe_struct_(void *fdt)
 	if (err)
 		return err;
 
-	if (fdt_off_dt_strings(fdt) != fdt_totalsize(fdt))
+	if (!can_assume(VALID_INPUT) &&
+	    fdt_off_dt_strings(fdt) != fdt_totalsize(fdt))
 		return -FDT_ERR_BADSTATE;
 	return 0;
 }
@@ -151,7 +155,8 @@ int fdt_resize(void *fdt, void *buf, int bufsize)
 	headsize = fdt_off_dt_struct(fdt) + fdt_size_dt_struct(fdt);
 	tailsize = fdt_size_dt_strings(fdt);
 
-	if ((headsize + tailsize) > fdt_totalsize(fdt))
+	if (!can_assume(VALID_DTB) &&
+	    headsize + tailsize > fdt_totalsize(fdt))
 		return -FDT_ERR_INTERNAL;
 
 	if ((headsize + tailsize) > bufsize)
diff --git a/scripts/dtc/libfdt/libfdt.h b/scripts/dtc/libfdt/libfdt.h
index 8907b09b86cc..36fadcdea516 100644
--- a/scripts/dtc/libfdt/libfdt.h
+++ b/scripts/dtc/libfdt/libfdt.h
@@ -266,11 +266,12 @@ fdt_set_hdr_(size_dt_struct);
  * fdt_header_size - return the size of the tree's header
  * @fdt: pointer to a flattened device tree
  */
+size_t fdt_header_size(const void *fdt);
+
+/**
+ * fdt_header_size_ - internal function which takes a version number
+ */
 size_t fdt_header_size_(uint32_t version);
-static inline size_t fdt_header_size(const void *fdt)
-{
-	return fdt_header_size_(fdt_version(fdt));
-}
 
 /**
  * fdt_check_header - sanity check a device tree header
diff --git a/scripts/dtc/libfdt/libfdt_internal.h b/scripts/dtc/libfdt/libfdt_internal.h
index 058c7358d441..d4e0bd49c037 100644
--- a/scripts/dtc/libfdt/libfdt_internal.h
+++ b/scripts/dtc/libfdt/libfdt_internal.h
@@ -48,4 +48,126 @@ static inline struct fdt_reserve_entry *fdt_mem_rsv_w_(void *fdt, int n)
 
 #define FDT_SW_MAGIC		(~FDT_MAGIC)
 
+/**********************************************************************/
+/* Checking controls                                                  */
+/**********************************************************************/
+
+#ifndef FDT_ASSUME_MASK
+#define FDT_ASSUME_MASK 0
+#endif
+
+/*
+ * Defines assumptions which can be enabled. Each of these can be enabled
+ * individually. For maximum safety, don't enable any assumptions!
+ *
+ * For minimal code size and no safety, use ASSUME_PERFECT at your own risk.
+ * You should have another method of validating the device tree, such as a
+ * signature or hash check before using libfdt.
+ *
+ * For situations where security is not a concern it may be safe to enable
+ * ASSUME_SANE.
+ */
+enum {
+	/*
+	 * This does essentially no checks. Only the latest device-tree
+	 * version is correctly handled. Inconsistencies or errors in the device
+	 * tree may cause undefined behaviour or crashes. Invalid parameters
+	 * passed to libfdt may do the same.
+	 *
+	 * If an error occurs when modifying the tree it may leave the tree in
+	 * an intermediate (but valid) state. As an example, adding a property
+	 * where there is insufficient space may result in the property name
+	 * being added to the string table even though the property itself is
+	 * not added to the struct section.
+	 *
+	 * Only use this if you have a fully validated device tree with
+	 * the latest supported version and wish to minimise code size.
+	 */
+	ASSUME_PERFECT		= 0xff,
+
+	/*
+	 * This assumes that the device tree is sane. i.e. header metadata
+	 * and basic hierarchy are correct.
+	 *
+	 * With this assumption enabled, normal device trees produced by libfdt
+	 * and the compiler should be handled safely. Malicious device trees and
+	 * complete garbage may cause libfdt to behave badly or crash. Truncated
+	 * device trees (e.g. those only partially loaded) can also cause
+	 * problems.
+	 *
+	 * Note: Only checks that relate exclusively to the device tree itself
+	 * (not the parameters passed to libfdt) are disabled by this
+	 * assumption. This includes checking headers, tags and the like.
+	 */
+	ASSUME_VALID_DTB	= 1 << 0,
+
+	/*
+	 * This builds on ASSUME_VALID_DTB and further assumes that libfdt
+	 * functions are called with valid parameters, i.e. not trigger
+	 * FDT_ERR_BADOFFSET or offsets that are out of bounds. It disables any
+	 * extensive checking of parameters and the device tree, making various
+	 * assumptions about correctness.
+	 *
+	 * It doesn't make sense to enable this assumption unless
+	 * ASSUME_VALID_DTB is also enabled.
+	 */
+	ASSUME_VALID_INPUT	= 1 << 1,
+
+	/*
+	 * This disables checks for device-tree version and removes all code
+	 * which handles older versions.
+	 *
+	 * Only enable this if you know you have a device tree with the latest
+	 * version.
+	 */
+	ASSUME_LATEST		= 1 << 2,
+
+	/*
+	 * This assumes that it is OK for a failed addition to the device tree,
+	 * due to lack of space or some other problem, to skip any rollback
+	 * steps (such as dropping the property name from the string table).
+	 * This is safe to enable in most circumstances, even though it may
+	 * leave the tree in a sub-optimal state.
+	 */
+	ASSUME_NO_ROLLBACK	= 1 << 3,
+
+	/*
+	 * This assumes that the device tree components appear in a 'convenient'
+	 * order, i.e. the memory reservation block first, then the structure
+	 * block and finally the string block.
+	 *
+	 * This order is not specified by the device-tree specification,
+	 * but is expected by libfdt. The device-tree compiler always created
+	 * device trees with this order.
+	 *
+	 * This assumption disables a check in fdt_open_into() and removes the
+	 * ability to fix the problem there. This is safe if you know that the
+	 * device tree is correctly ordered. See fdt_blocks_misordered_().
+	 */
+	ASSUME_LIBFDT_ORDER	= 1 << 4,
+
+	/*
+	 * This assumes that libfdt itself does not have any internal bugs. It
+	 * drops certain checks that should never be needed unless libfdt has an
+	 * undiscovered bug.
+	 *
+	 * This can generally be considered safe to enable.
+	 */
+	ASSUME_LIBFDT_FLAWLESS	= 1 << 5,
+};
+
+/**
+ * can_assume_() - check if a particular assumption is enabled
+ *
+ * @mask: Mask to check (ASSUME_...)
+ * @return true if that assumption is enabled, else false
+ */
+static inline bool can_assume_(int mask)
+{
+	return FDT_ASSUME_MASK & mask;
+}
+
+/** helper macros for checking assumptions */
+#define can_assume(_assume)	can_assume_(ASSUME_ ## _assume)
+
 #endif /* LIBFDT_INTERNAL_H */
diff --git a/scripts/dtc/version_gen.h b/scripts/dtc/version_gen.h
index 6dba95d23207..61dd7112d6e4 100644
--- a/scripts/dtc/version_gen.h
+++ b/scripts/dtc/version_gen.h
@@ -1 +1 @@
-#define DTC_VERSION "DTC 1.5.0-gc40aeb60"
+#define DTC_VERSION "DTC 1.6.0-g87a656ae"
-- 
cgit v1.2.3


From 5996a587a466fa469531272139d23a3b56e07e5c Mon Sep 17 00:00:00 2001
From: Carlos Neira <cneirabustos@gmail.com>
Date: Fri, 13 Mar 2020 12:46:50 -0300
Subject: bpf_helpers_doc.py: Fix warning when compiling bpftool

When compiling bpftool the following warning is found: "declaration of
'struct bpf_pidns_info' will not be visible outside of this function."
This patch adds struct bpf_pidns_info to type_fwds array to fix this.

Fixes: b4490c5c4e02 ("bpf: Added new helper bpf_get_ns_current_pid_tgid")
Signed-off-by: Carlos Neira <cneirabustos@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Quentin Monnet <quentin@isovalent.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20200313154650.13366-1-cneirabustos@gmail.com
---
 scripts/bpf_helpers_doc.py | 1 +
 1 file changed, 1 insertion(+)

(limited to 'scripts')

diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py
index c1e2b5410faa..f43d193aff3a 100755
--- a/scripts/bpf_helpers_doc.py
+++ b/scripts/bpf_helpers_doc.py
@@ -400,6 +400,7 @@ class PrinterHelpers(Printer):
             'struct bpf_fib_lookup',
             'struct bpf_perf_event_data',
             'struct bpf_perf_event_value',
+            'struct bpf_pidns_info',
             'struct bpf_sock',
             'struct bpf_sock_addr',
             'struct bpf_sock_ops',
-- 
cgit v1.2.3


From 82f2bc2fcc0160d6f82dd1ac64518ae0a4dd183f Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Wed, 11 Mar 2020 12:41:21 -0700
Subject: kbuild: Disable -Wpointer-to-enum-cast

Clang's -Wpointer-to-int-cast deviates from GCC in that it warns when
casting to enums. The kernel does this in certain places, such as device
tree matches to set the version of the device being used, which allows
the kernel to avoid using a gigantic union.

https://elixir.bootlin.com/linux/v5.5.8/source/drivers/ata/ahci_brcm.c#L428
https://elixir.bootlin.com/linux/v5.5.8/source/drivers/ata/ahci_brcm.c#L402
https://elixir.bootlin.com/linux/v5.5.8/source/include/linux/mod_devicetable.h#L264

To avoid a ton of false positive warnings, disable this particular part
of the warning, which has been split off into a separate diagnostic so
that the entire warning does not need to be turned off for clang. It
will be visible under W=1 in case people want to go about fixing these
easily and enabling the warning treewide.

Cc: stable@vger.kernel.org
Link: https://github.com/ClangBuiltLinux/linux/issues/887
Link: https://github.com/llvm/llvm-project/commit/2a41b31fcdfcb67ab7038fc2ffb606fd50b83a84
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.extrawarn | 1 +
 1 file changed, 1 insertion(+)

(limited to 'scripts')

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index ecddf83ac142..ca08f2fe7c34 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -48,6 +48,7 @@ KBUILD_CFLAGS += -Wno-initializer-overrides
 KBUILD_CFLAGS += -Wno-format
 KBUILD_CFLAGS += -Wno-sign-compare
 KBUILD_CFLAGS += -Wno-format-zero-length
+KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast)
 endif
 
 endif
-- 
cgit v1.2.3


From 5190044c2965514a973184ca68ef5fad57a24670 Mon Sep 17 00:00:00 2001
From: Jessica Yu <jeyu@kernel.org>
Date: Wed, 11 Mar 2020 18:01:20 +0100
Subject: modpost: move the namespace field in Module.symvers last

In order to preserve backwards compatability with kmod tools, we have to
move the namespace field in Module.symvers last, as the depmod -e -E
option looks at the first three fields in Module.symvers to check symbol
versions (and it's expected they stay in the original order of crc,
symbol, module).

In addition, update an ancient comment above read_dump() in modpost that
suggested that the export type field in Module.symvers was optional. I
suspect that there were historical reasons behind that comment that are
no longer accurate. We have been unconditionally printing the export
type since 2.6.18 (commit bd5cbcedf44), which is over a decade ago now.

Fix up read_dump() to treat each field as non-optional. I suspect the
original read_dump() code treated the export field as optional in order
to support pre <= 2.6.18 Module.symvers (which did not have the export
type field). Note that although symbol namespaces are optional, the
field will not be omitted from Module.symvers if a symbol does not have
a namespace. In this case, the field will simply be empty and the next
delimiter or end of line will follow.

Cc: stable@vger.kernel.org
Fixes: cb9b55d21fe0 ("modpost: add support for symbol namespaces")
Tested-by: Matthias Maennich <maennich@google.com>
Reviewed-by: Matthias Maennich <maennich@google.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Documentation/kbuild/modules.rst |  4 ++--
 scripts/export_report.pl         |  2 +-
 scripts/mod/modpost.c            | 24 ++++++++++++------------
 3 files changed, 15 insertions(+), 15 deletions(-)

(limited to 'scripts')

diff --git a/Documentation/kbuild/modules.rst b/Documentation/kbuild/modules.rst
index 69fa48ee93d6..e0b45a257f21 100644
--- a/Documentation/kbuild/modules.rst
+++ b/Documentation/kbuild/modules.rst
@@ -470,9 +470,9 @@ build.
 
 	The syntax of the Module.symvers file is::
 
-	<CRC>       <Symbol>          <Namespace>  <Module>                         <Export Type>
+	<CRC>       <Symbol>         <Module>                         <Export Type>     <Namespace>
 
-	0xe1cc2a05  usb_stor_suspend  USB_STORAGE  drivers/usb/storage/usb-storage  EXPORT_SYMBOL_GPL
+	0xe1cc2a05  usb_stor_suspend drivers/usb/storage/usb-storage  EXPORT_SYMBOL_GPL USB_STORAGE
 
 	The fields are separated by tabs and values may be empty (e.g.
 	if no namespace is defined for an exported symbol).
diff --git a/scripts/export_report.pl b/scripts/export_report.pl
index 548330e8c4e7..feb3d5542a62 100755
--- a/scripts/export_report.pl
+++ b/scripts/export_report.pl
@@ -94,7 +94,7 @@ if (defined $opt{'o'}) {
 #
 while ( <$module_symvers> ) {
 	chomp;
-	my (undef, $symbol, $namespace, $module, $gpl) = split('\t');
+	my (undef, $symbol, $module, $gpl, $namespace) = split('\t');
 	$SYMBOL { $symbol } =  [ $module , "0" , $symbol, $gpl];
 }
 close($module_symvers);
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 7edfdb2f4497..6ab235354f36 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2427,7 +2427,7 @@ static void write_if_changed(struct buffer *b, const char *fname)
 }
 
 /* parse Module.symvers file. line format:
- * 0x12345678<tab>symbol<tab>module[[<tab>export]<tab>something]
+ * 0x12345678<tab>symbol<tab>module<tab>export<tab>namespace
  **/
 static void read_dump(const char *fname, unsigned int kernel)
 {
@@ -2440,7 +2440,7 @@ static void read_dump(const char *fname, unsigned int kernel)
 		return;
 
 	while ((line = get_next_line(&pos, file, size))) {
-		char *symname, *namespace, *modname, *d, *export, *end;
+		char *symname, *namespace, *modname, *d, *export;
 		unsigned int crc;
 		struct module *mod;
 		struct symbol *s;
@@ -2448,16 +2448,16 @@ static void read_dump(const char *fname, unsigned int kernel)
 		if (!(symname = strchr(line, '\t')))
 			goto fail;
 		*symname++ = '\0';
-		if (!(namespace = strchr(symname, '\t')))
-			goto fail;
-		*namespace++ = '\0';
-		if (!(modname = strchr(namespace, '\t')))
+		if (!(modname = strchr(symname, '\t')))
 			goto fail;
 		*modname++ = '\0';
-		if ((export = strchr(modname, '\t')) != NULL)
-			*export++ = '\0';
-		if (export && ((end = strchr(export, '\t')) != NULL))
-			*end = '\0';
+		if (!(export = strchr(modname, '\t')))
+			goto fail;
+		*export++ = '\0';
+		if (!(namespace = strchr(export, '\t')))
+			goto fail;
+		*namespace++ = '\0';
+
 		crc = strtoul(line, &d, 16);
 		if (*symname == '\0' || *modname == '\0' || *d != '\0')
 			goto fail;
@@ -2508,9 +2508,9 @@ static void write_dump(const char *fname)
 				namespace = symbol->namespace;
 				buf_printf(&buf, "0x%08x\t%s\t%s\t%s\t%s\n",
 					   symbol->crc, symbol->name,
-					   namespace ? namespace : "",
 					   symbol->module->name,
-					   export_str(symbol->export));
+					   export_str(symbol->export),
+					   namespace ? namespace : "");
 			}
 			symbol = symbol->next;
 		}
-- 
cgit v1.2.3


From c2d920bf1fffc3a61cb77db24464caf39496b32d Mon Sep 17 00:00:00 2001
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: Fri, 13 Mar 2020 14:35:02 +0530
Subject: kconfig: Add support for 'as-option'

Currently kconfig does not have a feature that allows to detect if the
used assembler supports a specific compilation option.

Introduce 'as-option' to serve this purpose in the context of Kconfig:

        config X
                def_bool $(as-option,...)

Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-kbuild@vger.kernel.org
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 scripts/Kconfig.include | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'scripts')

diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index 85334dc8c997..a1c19255a030 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -31,6 +31,12 @@ cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -S -x c /dev/null -o /de
 # Return y if the linker supports <flag>, n otherwise
 ld-option = $(success,$(LD) -v $(1))
 
+# $(as-option,<flag>)
+# /dev/zero is used as output instead of /dev/null as some assembler cribs when
+# both input and output are same. Also both of them have same write behaviour so
+# can be easily substituted.
+as-option = $(success, $(CC) $(CLANG_FLAGS) $(1) -c -x assembler /dev/null -o /dev/zero)
+
 # $(as-instr,<instr>)
 # Return y if the assembler supports <instr>, n otherwise
 as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)
-- 
cgit v1.2.3


From 4b8a5cfb5fd375cf4c7502a18f0096ed2881be27 Mon Sep 17 00:00:00 2001
From: Xiao Yang <yangx.jy@cn.fujitsu.com>
Date: Wed, 18 Mar 2020 18:34:16 +0800
Subject: modpost: Get proper section index by get_secindex() instead of
 st_shndx

(uint16_t) st_shndx is limited to 65535(i.e. SHN_XINDEX) so sym_get_data() gets
wrong section index by st_shndx if requested symbol contains extended section
index that is more than 65535.  In this case, we need to get proper section index
by .symtab_shndx section.

Module.symvers generated by building kernel with "-ffunction-sections -fdata-sections"
shows the issue.

Fixes: 56067812d5b0 ("kbuild: modversions: add infrastructure for emitting relative CRCs")
Fixes: e84f9fbbece1 ("modpost: refactor namespace_from_kstrtabns() to not hard-code section name")
Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/mod/modpost.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 6ab235354f36..55a0a2eccbd2 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -308,7 +308,8 @@ static const char *sec_name(struct elf_info *elf, int secindex)
 
 static void *sym_get_data(const struct elf_info *info, const Elf_Sym *sym)
 {
-	Elf_Shdr *sechdr = &info->sechdrs[sym->st_shndx];
+	unsigned int secindex = get_secindex(info, sym);
+	Elf_Shdr *sechdr = &info->sechdrs[secindex];
 	unsigned long offset;
 
 	offset = sym->st_value;
-- 
cgit v1.2.3


From e6b0de469c5babfe29a86be289408ba2070ea44a Mon Sep 17 00:00:00 2001
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Date: Thu, 20 Feb 2020 15:28:50 +0530
Subject: bus: mhi: core: Add uevent support for module autoloading

Add uevent support to MHI bus so that the client drivers can be autoloaded
by udev when the MHI devices gets created. The client drivers are
expected to provide MODULE_DEVICE_TABLE with the MHI id_table struct so
that the alias can be exported.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Jeffrey Hugo <jhugo@codeaurora.org>
Tested-by: Jeffrey Hugo <jhugo@codeaurora.org>
Link: https://lore.kernel.org/r/20200220095854.4804-13-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/bus/mhi/core/init.c       |  9 +++++++++
 include/linux/mod_devicetable.h   |  1 +
 scripts/mod/devicetable-offsets.c |  3 +++
 scripts/mod/file2alias.c          | 10 ++++++++++
 4 files changed, 23 insertions(+)

(limited to 'scripts')

diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
index 7bfffa9a5ad1..5fb756ca335e 100644
--- a/drivers/bus/mhi/core/init.c
+++ b/drivers/bus/mhi/core/init.c
@@ -1210,6 +1210,14 @@ void mhi_driver_unregister(struct mhi_driver *mhi_drv)
 }
 EXPORT_SYMBOL_GPL(mhi_driver_unregister);
 
+static int mhi_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct mhi_device *mhi_dev = to_mhi_device(dev);
+
+	return add_uevent_var(env, "MODALIAS=" MHI_DEVICE_MODALIAS_FMT,
+					mhi_dev->chan_name);
+}
+
 static int mhi_match(struct device *dev, struct device_driver *drv)
 {
 	struct mhi_device *mhi_dev = to_mhi_device(dev);
@@ -1236,6 +1244,7 @@ struct bus_type mhi_bus_type = {
 	.name = "mhi",
 	.dev_name = "mhi",
 	.match = mhi_match,
+	.uevent = mhi_uevent,
 };
 
 static int __init mhi_init(void)
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index be15e997fe39..f10e779a3fd0 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -821,6 +821,7 @@ struct wmi_device_id {
 	const void *context;
 };
 
+#define MHI_DEVICE_MODALIAS_FMT "mhi:%s"
 #define MHI_NAME_SIZE 32
 
 /**
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c
index 054405b90ba4..fe3f4a95cb21 100644
--- a/scripts/mod/devicetable-offsets.c
+++ b/scripts/mod/devicetable-offsets.c
@@ -231,5 +231,8 @@ int main(void)
 	DEVID(wmi_device_id);
 	DEVID_FIELD(wmi_device_id, guid_string);
 
+	DEVID(mhi_device_id);
+	DEVID_FIELD(mhi_device_id, chan);
+
 	return 0;
 }
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index c91eba751804..cae6a4e471b5 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -1335,6 +1335,15 @@ static int do_wmi_entry(const char *filename, void *symval, char *alias)
 	return 1;
 }
 
+/* Looks like: mhi:S */
+static int do_mhi_entry(const char *filename, void *symval, char *alias)
+{
+	DEF_FIELD_ADDR(symval, mhi_device_id, chan);
+	sprintf(alias, MHI_DEVICE_MODALIAS_FMT, *chan);
+
+	return 1;
+}
+
 /* Does namelen bytes of name exactly match the symbol? */
 static bool sym_is(const char *name, unsigned namelen, const char *symbol)
 {
@@ -1407,6 +1416,7 @@ static const struct devtable devtable[] = {
 	{"typec", SIZE_typec_device_id, do_typec_entry},
 	{"tee", SIZE_tee_client_device_id, do_tee_entry},
 	{"wmi", SIZE_wmi_device_id, do_wmi_entry},
+	{"mhi", SIZE_mhi_device_id, do_mhi_entry},
 };
 
 /* Create MODULE_ALIAS() statements.
-- 
cgit v1.2.3


From 90ceddcb495008ac8ba7a3dce297841efcd7d584 Mon Sep 17 00:00:00 2001
From: Fangrui Song <maskray@google.com>
Date: Wed, 18 Mar 2020 15:27:46 -0700
Subject: bpf: Support llvm-objcopy for vmlinux BTF

Simplify gen_btf logic to make it work with llvm-objcopy. The existing
'file format' and 'architecture' parsing logic is brittle and does not
work with llvm-objcopy/llvm-objdump.

'file format' output of llvm-objdump>=11 will match GNU objdump, but
'architecture' (bfdarch) may not.

.BTF in .tmp_vmlinux.btf is non-SHF_ALLOC. Add the SHF_ALLOC flag
because it is part of vmlinux image used for introspection. C code
can reference the section via linker script defined __start_BTF and
__stop_BTF. This fixes a small problem that previous .BTF had the
SHF_WRITE flag (objcopy -I binary -O elf* synthesized .data).

Additionally, `objcopy -I binary` synthesized symbols
_binary__btf_vmlinux_bin_start and _binary__btf_vmlinux_bin_stop (not
used elsewhere) are replaced with more commonplace __start_BTF and
__stop_BTF.

Add 2>/dev/null because GNU objcopy (but not llvm-objcopy) warns
"empty loadable segment detected at vaddr=0xffffffff81000000, is this intentional?"

We use a dd command to change the e_type field in the ELF header from
ET_EXEC to ET_REL so that lld will accept .btf.vmlinux.bin.o.  Accepting
ET_EXEC as an input file is an extremely rare GNU ld feature that lld
does not intend to support, because this is error-prone.

The output section description .BTF in include/asm-generic/vmlinux.lds.h
avoids potential subtle orphan section placement issues and suppresses
--orphan-handling=warn warnings.

Fixes: df786c9b9476 ("bpf: Force .BTF section start to zero when dumping from vmlinux")
Fixes: cb0cc635c7a9 ("powerpc: Include .BTF section")
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Fangrui Song <maskray@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: Stanislav Fomichev <sdf@google.com>
Tested-by: Andrii Nakryiko <andriin@fb.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Link: https://github.com/ClangBuiltLinux/linux/issues/871
Link: https://lore.kernel.org/bpf/20200318222746.173648-1-maskray@google.com
---
 arch/powerpc/kernel/vmlinux.lds.S |  6 ------
 include/asm-generic/vmlinux.lds.h | 15 +++++++++++++++
 kernel/bpf/btf.c                  |  9 ++++-----
 kernel/bpf/sysfs_btf.c            | 11 +++++------
 scripts/link-vmlinux.sh           | 24 ++++++++++--------------
 5 files changed, 34 insertions(+), 31 deletions(-)

(limited to 'scripts')

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index a32d478a7f41..b4c89a1acebb 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -303,12 +303,6 @@ SECTIONS
 		*(.branch_lt)
 	}
 
-#ifdef CONFIG_DEBUG_INFO_BTF
-	.BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {
-		*(.BTF)
-	}
-#endif
-
 	.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
 		__start_opd = .;
 		KEEP(*(.opd))
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index e00f41aa8ec4..39da8d8b561d 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -535,6 +535,7 @@
 									\
 	RO_EXCEPTION_TABLE						\
 	NOTES								\
+	BTF								\
 									\
 	. = ALIGN((align));						\
 	__end_rodata = .;
@@ -621,6 +622,20 @@
 		__stop___ex_table = .;					\
 	}
 
+/*
+ * .BTF
+ */
+#ifdef CONFIG_DEBUG_INFO_BTF
+#define BTF								\
+	.BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {				\
+		__start_BTF = .;					\
+		*(.BTF)							\
+		__stop_BTF = .;						\
+	}
+#else
+#define BTF
+#endif
+
 /*
  * Init task
  */
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 50080add2ab9..6f397c4da05e 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -3477,8 +3477,8 @@ errout:
 	return ERR_PTR(err);
 }
 
-extern char __weak _binary__btf_vmlinux_bin_start[];
-extern char __weak _binary__btf_vmlinux_bin_end[];
+extern char __weak __start_BTF[];
+extern char __weak __stop_BTF[];
 extern struct btf *btf_vmlinux;
 
 #define BPF_MAP_TYPE(_id, _ops)
@@ -3605,9 +3605,8 @@ struct btf *btf_parse_vmlinux(void)
 	}
 	env->btf = btf;
 
-	btf->data = _binary__btf_vmlinux_bin_start;
-	btf->data_size = _binary__btf_vmlinux_bin_end -
-		_binary__btf_vmlinux_bin_start;
+	btf->data = __start_BTF;
+	btf->data_size = __stop_BTF - __start_BTF;
 
 	err = btf_parse_hdr(env);
 	if (err)
diff --git a/kernel/bpf/sysfs_btf.c b/kernel/bpf/sysfs_btf.c
index 7ae5dddd1fe6..3b495773de5a 100644
--- a/kernel/bpf/sysfs_btf.c
+++ b/kernel/bpf/sysfs_btf.c
@@ -9,15 +9,15 @@
 #include <linux/sysfs.h>
 
 /* See scripts/link-vmlinux.sh, gen_btf() func for details */
-extern char __weak _binary__btf_vmlinux_bin_start[];
-extern char __weak _binary__btf_vmlinux_bin_end[];
+extern char __weak __start_BTF[];
+extern char __weak __stop_BTF[];
 
 static ssize_t
 btf_vmlinux_read(struct file *file, struct kobject *kobj,
 		 struct bin_attribute *bin_attr,
 		 char *buf, loff_t off, size_t len)
 {
-	memcpy(buf, _binary__btf_vmlinux_bin_start + off, len);
+	memcpy(buf, __start_BTF + off, len);
 	return len;
 }
 
@@ -30,15 +30,14 @@ static struct kobject *btf_kobj;
 
 static int __init btf_vmlinux_init(void)
 {
-	if (!_binary__btf_vmlinux_bin_start)
+	if (!__start_BTF)
 		return 0;
 
 	btf_kobj = kobject_create_and_add("btf", kernel_kobj);
 	if (!btf_kobj)
 		return -ENOMEM;
 
-	bin_attr_btf_vmlinux.size = _binary__btf_vmlinux_bin_end -
-				    _binary__btf_vmlinux_bin_start;
+	bin_attr_btf_vmlinux.size = __stop_BTF - __start_BTF;
 
 	return sysfs_create_bin_file(btf_kobj, &bin_attr_btf_vmlinux);
 }
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index ac569e197bfa..d09ab4afbda4 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -113,9 +113,6 @@ vmlinux_link()
 gen_btf()
 {
 	local pahole_ver
-	local bin_arch
-	local bin_format
-	local bin_file
 
 	if ! [ -x "$(command -v ${PAHOLE})" ]; then
 		echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available"
@@ -133,17 +130,16 @@ gen_btf()
 	info "BTF" ${2}
 	LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1}
 
-	# dump .BTF section into raw binary file to link with final vmlinux
-	bin_arch=$(LANG=C ${OBJDUMP} -f ${1} | grep architecture | \
-		cut -d, -f1 | cut -d' ' -f2)
-	bin_format=$(LANG=C ${OBJDUMP} -f ${1} | grep 'file format' | \
-		awk '{print $4}')
-	bin_file=.btf.vmlinux.bin
-	${OBJCOPY} --change-section-address .BTF=0 \
-		--set-section-flags .BTF=alloc -O binary \
-		--only-section=.BTF ${1} $bin_file
-	${OBJCOPY} -I binary -O ${bin_format} -B ${bin_arch} \
-		--rename-section .data=.BTF $bin_file ${2}
+	# Create ${2} which contains just .BTF section but no symbols. Add
+	# SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all
+	# deletes all symbols including __start_BTF and __stop_BTF, which will
+	# be redefined in the linker script. Add 2>/dev/null to suppress GNU
+	# objcopy warnings: "empty loadable segment detected at ..."
+	${OBJCOPY} --only-section=.BTF --set-section-flags .BTF=alloc,readonly \
+		--strip-all ${1} ${2} 2>/dev/null
+	# Change e_type to ET_REL so that it can be used to link final vmlinux.
+	# Unlike GNU ld, lld does not allow an ET_EXEC input.
+	printf '\1' | dd of=${2} conv=notrunc bs=1 seek=16 status=none
 }
 
 # Create ${2} .o file with all symbols from the ${1} object file
-- 
cgit v1.2.3


From 7883a14339299773b2ce08dcfd97c63c199a9289 Mon Sep 17 00:00:00 2001
From: Mikhail Petrov <Mikhail.Petrov@mir.dev>
Date: Wed, 11 Mar 2020 23:37:09 +0300
Subject: scripts/kallsyms: fix wrong kallsyms_relative_base

There is the code in the read_symbol function in 'scripts/kallsyms.c':

	if (is_ignored_symbol(name, type))
		return NULL;

	/* Ignore most absolute/undefined (?) symbols. */
	if (strcmp(name, "_text") == 0)
		_text = addr;

But the is_ignored_symbol function returns true for name="_text" and
type='A'. So the next condition is not executed and the _text variable
is always zero.

It makes the wrong kallsyms_relative_base symbol as a result of the code
(CONFIG_KALLSYMS_BASE_RELATIVE is defined):

	if (base_relative) {
		output_label("kallsyms_relative_base");
		output_address(relative_base);
		printf("\n");
	}

Because the output_address function uses the _text variable.

So the kallsyms_lookup function and all related functions in the kernel
do not work properly. For example, the stack trace in oops:

 Call Trace:
 [aa095e58] [809feab8] kobj_ns_ops_tbl+0x7ff09ac8/0x7ff1c1c4 (unreliable)
 [aa095e98] [80002b64] kobj_ns_ops_tbl+0x7f50db74/0x80000010
 [aa095ef8] [809c3d24] kobj_ns_ops_tbl+0x7feced34/0x7ff1c1c4
 [aa095f28] [80002ed0] kobj_ns_ops_tbl+0x7f50dee0/0x80000010
 [aa095f38] [8000f238] kobj_ns_ops_tbl+0x7f51a248/0x80000010

The right stack trace:

 Call Trace:
 [aa095e58] [809feab8] module_vdu_video_init+0x2fc/0x3bc (unreliable)
 [aa095e98] [80002b64] do_one_initcall+0x40/0x1f0
 [aa095ef8] [809c3d24] kernel_init_freeable+0x164/0x1d8
 [aa095f28] [80002ed0] kernel_init+0x14/0x124
 [aa095f38] [8000f238] ret_from_kernel_thread+0x14/0x1c

[masahiroy@kernel.org:

This issue happens on binutils <= 2.22
The following commit fixed it:
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=d2667025dd30611514810c28bee9709e4623012a

The symbol type of _text is 'T' on binutils >= 2.23
The minimal supported binutils version for the kernel build is 2.21
]

Signed-off-by: Mikhail Petrov <Mikhail.Petrov@mir.dev>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kallsyms.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 0133dfaaf352..3e8dea6e0a95 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -195,13 +195,13 @@ static struct sym_entry *read_symbol(FILE *in)
 		return NULL;
 	}
 
-	if (is_ignored_symbol(name, type))
-		return NULL;
-
-	/* Ignore most absolute/undefined (?) symbols. */
 	if (strcmp(name, "_text") == 0)
 		_text = addr;
 
+	/* Ignore most absolute/undefined (?) symbols. */
+	if (is_ignored_symbol(name, type))
+		return NULL;
+
 	check_symbol_range(name, addr, text_ranges, ARRAY_SIZE(text_ranges));
 	check_symbol_range(name, addr, &percpu_range, 1);
 
-- 
cgit v1.2.3


From f58dd03b1157bdf3b64c36e9525f8d7f69c25df2 Mon Sep 17 00:00:00 2001
From: Vincenzo Frascino <vincenzo.frascino@arm.com>
Date: Fri, 20 Mar 2020 14:53:41 +0000
Subject: scripts: Fix the inclusion order in modpost

In the process of creating the source file of a module modpost injects a
set of includes that are not required if the compilation unit is
statically built into the kernel.

The order of inclusion of the headers can cause redefinition problems
(e.g.):

   In file included from include/linux/elf.h:5:0,
                    from include/linux/module.h:18,
                    from crypto/arc4.mod.c:2:
    #define ELF_OSABI  ELFOSABI_LINUX

   In file included from include/linux/elfnote.h:62:0,
                    from include/linux/build-salt.h:4,
                    from crypto/arc4.mod.c:1:
   include/uapi/linux/elf.h:363:0: note: this is the location of
   the previous definition
    #define ELF_OSABI ELFOSABI_NONE

The issue was exposed during the development of the series [1].

[1] https://lore.kernel.org/lkml/20200306133242.26279-1-vincenzo.frascino@arm.com/

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Michal Marek <michal.lkml@markovi.net>
Link: https://lkml.kernel.org/r/20200320145351.32292-17-vincenzo.frascino@arm.com
---
 scripts/mod/modpost.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 7edfdb2f4497..0f354b1ee2aa 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2251,8 +2251,12 @@ static int check_modname_len(struct module *mod)
  **/
 static void add_header(struct buffer *b, struct module *mod)
 {
-	buf_printf(b, "#include <linux/build-salt.h>\n");
 	buf_printf(b, "#include <linux/module.h>\n");
+	/*
+	 * Include build-salt.h after module.h in order to
+	 * inherit the definitions.
+	 */
+	buf_printf(b, "#include <linux/build-salt.h>\n");
 	buf_printf(b, "#include <linux/vermagic.h>\n");
 	buf_printf(b, "#include <linux/compiler.h>\n");
 	buf_printf(b, "\n");
-- 
cgit v1.2.3


From 2431f22a911a6130a10b4a0c6f13d10ede007d39 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 7 Mar 2020 02:08:51 +0900
Subject: kbuild: compute the dtbs_install destination more simply

The 'dtbinst_root' is used to remember the root of the in-kernel dts
directory (i.e. arch/*/boot/dts), but it looks clumsy.

I prefer using two variables 'obj' and 'dst' to track the in-kernel
directory and the install destination, respectively.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Makefile                 | 2 +-
 scripts/Makefile.dtbinst | 8 ++------
 2 files changed, 3 insertions(+), 7 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index 8533bb68d69b..d32e8c86f09c 100644
--- a/Makefile
+++ b/Makefile
@@ -1258,7 +1258,7 @@ endif
 dtbs_check: dtbs
 
 dtbs_install:
-	$(Q)$(MAKE) $(dtbinst)=$(dtstree)
+	$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
 
 ifdef CONFIG_OF_EARLY_FLATTREE
 all: dtbs
diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst
index 7301ab5e2e06..fcd5f2eaaad1 100644
--- a/scripts/Makefile.dtbinst
+++ b/scripts/Makefile.dtbinst
@@ -13,8 +13,6 @@ src := $(obj)
 PHONY := __dtbs_install
 __dtbs_install:
 
-export dtbinst_root ?= $(obj)
-
 include include/config/auto.conf
 include scripts/Kbuild.include
 include $(src)/Makefile
@@ -26,13 +24,11 @@ dtbinst-dirs	:= $(subdir-y) $(subdir-m)
 quiet_cmd_dtb_install =	INSTALL $<
       cmd_dtb_install =	mkdir -p $(2); cp $< $(2)
 
-install-dir = $(patsubst $(dtbinst_root)%,$(INSTALL_DTBS_PATH)%,$(obj))
-
 $(dtbinst-files): %.dtb: $(obj)/%.dtb
-	$(call cmd,dtb_install,$(install-dir))
+	$(call cmd,dtb_install,$(dst))
 
 $(dtbinst-dirs):
-	$(Q)$(MAKE) $(dtbinst)=$(obj)/$@
+	$(Q)$(MAKE) $(dtbinst)=$(obj)/$@ dst=$(dst)/$@
 
 PHONY += $(dtbinst-files) $(dtbinst-dirs)
 __dtbs_install: $(dtbinst-files) $(dtbinst-dirs)
-- 
cgit v1.2.3


From aefd80307a05e529b3bcd28f96a7b49528697f60 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 7 Mar 2020 02:08:52 +0900
Subject: kbuild: refactor Makefile.dtbinst more

Refactor Makefile.dtbinst so it looks similar to other Makefiles.

*.dtb should not be a phony target. Copy files based on the timestamps.
Print installed dtb paths instead of in-kernel dtb paths.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.dtbinst | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst
index fcd5f2eaaad1..50d580d77ae9 100644
--- a/scripts/Makefile.dtbinst
+++ b/scripts/Makefile.dtbinst
@@ -17,20 +17,20 @@ include include/config/auto.conf
 include scripts/Kbuild.include
 include $(src)/Makefile
 
-dtbinst-files	:= $(sort $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS), $(dtb-)))
-dtbinst-dirs	:= $(subdir-y) $(subdir-m)
+dtbs    := $(addprefix $(dst)/, $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS),$(dtb-)))
+subdirs := $(addprefix $(obj)/, $(subdir-y) $(subdir-m))
 
-# Helper targets for Installing DTBs into the boot directory
-quiet_cmd_dtb_install =	INSTALL $<
-      cmd_dtb_install =	mkdir -p $(2); cp $< $(2)
+__dtbs_install: $(dtbs) $(subdirs)
+	@:
 
-$(dtbinst-files): %.dtb: $(obj)/%.dtb
-	$(call cmd,dtb_install,$(dst))
+quiet_cmd_dtb_install = INSTALL $@
+      cmd_dtb_install = install -D $< $@
 
-$(dtbinst-dirs):
-	$(Q)$(MAKE) $(dtbinst)=$(obj)/$@ dst=$(dst)/$@
+$(dst)/%.dtb: $(obj)/%.dtb
+	$(call cmd,dtb_install)
 
-PHONY += $(dtbinst-files) $(dtbinst-dirs)
-__dtbs_install: $(dtbinst-files) $(dtbinst-dirs)
+PHONY += $(subdirs)
+$(subdirs):
+	$(Q)$(MAKE) $(dtbinst)=$@ dst=$(patsubst $(obj)/%,$(dst)/%,$@)
 
 .PHONY: $(PHONY)
-- 
cgit v1.2.3


From 2985bed68083f3da5f6d79c3dbb9196dbc04d02a Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 3 Mar 2020 22:35:58 +0900
Subject: .gitignore: remove too obvious comments

Some .gitignore files have comments like "Generated files",
"Ignore generated files" at the header part, but they are
too obvious.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 certs/.gitignore               | 3 ---
 drivers/atm/.gitignore         | 1 -
 drivers/video/logo/.gitignore  | 3 ---
 kernel/.gitignore              | 3 ---
 lib/.gitignore                 | 3 ---
 scripts/.gitignore             | 3 ---
 scripts/kconfig/.gitignore     | 3 ---
 scripts/selinux/mdp/.gitignore | 1 -
 security/apparmor/.gitignore   | 3 ---
 sound/oss/.gitignore           | 1 -
 10 files changed, 24 deletions(-)

(limited to 'scripts')

diff --git a/certs/.gitignore b/certs/.gitignore
index f51aea4a71ec..4d58ba042b37 100644
--- a/certs/.gitignore
+++ b/certs/.gitignore
@@ -1,4 +1 @@
-#
-# Generated files
-#
 x509_certificate_list
diff --git a/drivers/atm/.gitignore b/drivers/atm/.gitignore
index fc0ae5eb05d8..19f3ffbd1d65 100644
--- a/drivers/atm/.gitignore
+++ b/drivers/atm/.gitignore
@@ -1,4 +1,3 @@
-# Ignore generated files
 fore200e_mkfirm
 fore200e_pca_fw.c
 pca200e.bin
diff --git a/drivers/video/logo/.gitignore b/drivers/video/logo/.gitignore
index 9dda1b26b2e4..1551a75afdbd 100644
--- a/drivers/video/logo/.gitignore
+++ b/drivers/video/logo/.gitignore
@@ -1,6 +1,3 @@
-#
-# Generated files
-#
 *_mono.c
 *_vga16.c
 *_clut224.c
diff --git a/kernel/.gitignore b/kernel/.gitignore
index 34d1e77ee9df..0a423a3ca2e1 100644
--- a/kernel/.gitignore
+++ b/kernel/.gitignore
@@ -1,6 +1,3 @@
-#
-# Generated files
-#
 kheaders.md5
 timeconst.h
 hz.bc
diff --git a/lib/.gitignore b/lib/.gitignore
index f2a39c9e5485..9af73655a239 100644
--- a/lib/.gitignore
+++ b/lib/.gitignore
@@ -1,6 +1,3 @@
-#
-# Generated files
-#
 gen_crc32table
 gen_crc64table
 crc32table.h
diff --git a/scripts/.gitignore b/scripts/.gitignore
index ef45f96cd7a5..9fe29efbcb95 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -1,6 +1,3 @@
-#
-# Generated files
-#
 bin2c
 kallsyms
 unifdef
diff --git a/scripts/kconfig/.gitignore b/scripts/kconfig/.gitignore
index b5bf92f66d11..588988711e07 100644
--- a/scripts/kconfig/.gitignore
+++ b/scripts/kconfig/.gitignore
@@ -1,6 +1,3 @@
-#
-# Generated files
-#
 *.moc
 *conf-cfg
 
diff --git a/scripts/selinux/mdp/.gitignore b/scripts/selinux/mdp/.gitignore
index 654546d8dffd..0d9f827dc14b 100644
--- a/scripts/selinux/mdp/.gitignore
+++ b/scripts/selinux/mdp/.gitignore
@@ -1,2 +1 @@
-# Generated file
 mdp
diff --git a/security/apparmor/.gitignore b/security/apparmor/.gitignore
index d5b291e94264..0ace1d1dec44 100644
--- a/security/apparmor/.gitignore
+++ b/security/apparmor/.gitignore
@@ -1,6 +1,3 @@
-#
-# Generated include files
-#
 net_names.h
 capability_names.h
 rlim_names.h
diff --git a/sound/oss/.gitignore b/sound/oss/.gitignore
index 12a3920d6fb6..8fd8fd3eff62 100644
--- a/sound/oss/.gitignore
+++ b/sound/oss/.gitignore
@@ -1,3 +1,2 @@
-#Ignore generated files
 pss_boot.h
 trix_boot.h
-- 
cgit v1.2.3


From d198b34f3855eee2571dda03eea75a09c7c31480 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 3 Mar 2020 22:35:59 +0900
Subject: .gitignore: add SPDX License Identifier

Add SPDX License Identifier to all .gitignore files.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 .gitignore                                                               | 1 +
 Documentation/.gitignore                                                 | 1 +
 Documentation/devicetree/bindings/.gitignore                             | 1 +
 Documentation/vm/.gitignore                                              | 1 +
 arch/.gitignore                                                          | 1 +
 arch/alpha/kernel/.gitignore                                             | 1 +
 arch/arc/boot/.gitignore                                                 | 1 +
 arch/arc/kernel/.gitignore                                               | 1 +
 arch/arm/boot/.gitignore                                                 | 1 +
 arch/arm/boot/compressed/.gitignore                                      | 1 +
 arch/arm/crypto/.gitignore                                               | 1 +
 arch/arm/kernel/.gitignore                                               | 1 +
 arch/arm/mach-at91/.gitignore                                            | 1 +
 arch/arm/mach-omap2/.gitignore                                           | 1 +
 arch/arm/vdso/.gitignore                                                 | 1 +
 arch/arm64/boot/.gitignore                                               | 1 +
 arch/arm64/crypto/.gitignore                                             | 1 +
 arch/arm64/kernel/.gitignore                                             | 1 +
 arch/arm64/kernel/vdso/.gitignore                                        | 1 +
 arch/arm64/kernel/vdso32/.gitignore                                      | 1 +
 arch/ia64/kernel/.gitignore                                              | 1 +
 arch/m68k/kernel/.gitignore                                              | 1 +
 arch/microblaze/boot/.gitignore                                          | 1 +
 arch/microblaze/kernel/.gitignore                                        | 1 +
 arch/mips/boot/.gitignore                                                | 1 +
 arch/mips/boot/compressed/.gitignore                                     | 1 +
 arch/mips/boot/tools/.gitignore                                          | 1 +
 arch/mips/kernel/.gitignore                                              | 1 +
 arch/mips/tools/.gitignore                                               | 1 +
 arch/mips/vdso/.gitignore                                                | 1 +
 arch/nds32/kernel/.gitignore                                             | 1 +
 arch/nds32/kernel/vdso/.gitignore                                        | 1 +
 arch/nios2/boot/.gitignore                                               | 1 +
 arch/nios2/kernel/.gitignore                                             | 1 +
 arch/openrisc/kernel/.gitignore                                          | 1 +
 arch/parisc/boot/.gitignore                                              | 1 +
 arch/parisc/boot/compressed/.gitignore                                   | 1 +
 arch/parisc/kernel/.gitignore                                            | 1 +
 arch/powerpc/boot/.gitignore                                             | 1 +
 arch/powerpc/kernel/.gitignore                                           | 1 +
 arch/powerpc/kernel/vdso32/.gitignore                                    | 1 +
 arch/powerpc/kernel/vdso64/.gitignore                                    | 1 +
 arch/powerpc/platforms/cell/spufs/.gitignore                             | 1 +
 arch/powerpc/purgatory/.gitignore                                        | 1 +
 arch/riscv/boot/.gitignore                                               | 1 +
 arch/riscv/kernel/.gitignore                                             | 1 +
 arch/riscv/kernel/vdso/.gitignore                                        | 1 +
 arch/s390/boot/.gitignore                                                | 1 +
 arch/s390/boot/compressed/.gitignore                                     | 1 +
 arch/s390/kernel/.gitignore                                              | 1 +
 arch/s390/kernel/vdso64/.gitignore                                       | 1 +
 arch/s390/purgatory/.gitignore                                           | 1 +
 arch/s390/tools/.gitignore                                               | 1 +
 arch/sh/boot/.gitignore                                                  | 1 +
 arch/sh/boot/compressed/.gitignore                                       | 1 +
 arch/sh/kernel/.gitignore                                                | 1 +
 arch/sh/kernel/vsyscall/.gitignore                                       | 1 +
 arch/sparc/boot/.gitignore                                               | 1 +
 arch/sparc/kernel/.gitignore                                             | 1 +
 arch/sparc/vdso/.gitignore                                               | 1 +
 arch/sparc/vdso/vdso32/.gitignore                                        | 1 +
 arch/um/.gitignore                                                       | 1 +
 arch/unicore32/.gitignore                                                | 1 +
 arch/x86/.gitignore                                                      | 1 +
 arch/x86/boot/.gitignore                                                 | 1 +
 arch/x86/boot/compressed/.gitignore                                      | 1 +
 arch/x86/boot/tools/.gitignore                                           | 1 +
 arch/x86/crypto/.gitignore                                               | 1 +
 arch/x86/entry/vdso/.gitignore                                           | 1 +
 arch/x86/entry/vdso/vdso32/.gitignore                                    | 1 +
 arch/x86/kernel/.gitignore                                               | 1 +
 arch/x86/kernel/cpu/.gitignore                                           | 1 +
 arch/x86/lib/.gitignore                                                  | 1 +
 arch/x86/realmode/rm/.gitignore                                          | 1 +
 arch/x86/tools/.gitignore                                                | 1 +
 arch/x86/um/vdso/.gitignore                                              | 1 +
 arch/xtensa/boot/.gitignore                                              | 1 +
 arch/xtensa/boot/boot-elf/.gitignore                                     | 1 +
 arch/xtensa/boot/lib/.gitignore                                          | 1 +
 arch/xtensa/kernel/.gitignore                                            | 1 +
 certs/.gitignore                                                         | 1 +
 drivers/atm/.gitignore                                                   | 1 +
 drivers/crypto/vmx/.gitignore                                            | 1 +
 drivers/eisa/.gitignore                                                  | 1 +
 drivers/gpu/drm/i915/.gitignore                                          | 1 +
 drivers/gpu/drm/radeon/.gitignore                                        | 1 +
 drivers/memory/.gitignore                                                | 1 +
 drivers/net/wan/.gitignore                                               | 1 +
 drivers/scsi/.gitignore                                                  | 1 +
 drivers/scsi/aic7xxx/.gitignore                                          | 1 +
 drivers/staging/comedi/drivers/ni_routing/tools/.gitignore               | 1 +
 drivers/staging/greybus/tools/.gitignore                                 | 1 +
 drivers/video/logo/.gitignore                                            | 1 +
 drivers/zorro/.gitignore                                                 | 1 +
 fs/unicode/.gitignore                                                    | 1 +
 kernel/.gitignore                                                        | 1 +
 kernel/debug/kdb/.gitignore                                              | 1 +
 lib/.gitignore                                                           | 1 +
 lib/raid6/.gitignore                                                     | 1 +
 net/bpfilter/.gitignore                                                  | 1 +
 net/wireless/.gitignore                                                  | 1 +
 samples/auxdisplay/.gitignore                                            | 1 +
 samples/bpf/.gitignore                                                   | 1 +
 samples/connector/.gitignore                                             | 1 +
 samples/hidraw/.gitignore                                                | 1 +
 samples/mei/.gitignore                                                   | 1 +
 samples/mic/mpssd/.gitignore                                             | 1 +
 samples/pidfd/.gitignore                                                 | 1 +
 samples/seccomp/.gitignore                                               | 1 +
 samples/timers/.gitignore                                                | 1 +
 samples/vfs/.gitignore                                                   | 1 +
 samples/watchdog/.gitignore                                              | 1 +
 scripts/.gitignore                                                       | 1 +
 scripts/basic/.gitignore                                                 | 1 +
 scripts/dtc/.gitignore                                                   | 1 +
 scripts/gcc-plugins/.gitignore                                           | 1 +
 scripts/gdb/linux/.gitignore                                             | 1 +
 scripts/genksyms/.gitignore                                              | 1 +
 scripts/kconfig/.gitignore                                               | 1 +
 scripts/mod/.gitignore                                                   | 1 +
 scripts/selinux/genheaders/.gitignore                                    | 1 +
 scripts/selinux/mdp/.gitignore                                           | 1 +
 security/apparmor/.gitignore                                             | 1 +
 security/selinux/.gitignore                                              | 1 +
 security/tomoyo/.gitignore                                               | 1 +
 sound/oss/.gitignore                                                     | 1 +
 tools/accounting/.gitignore                                              | 1 +
 tools/bootconfig/.gitignore                                              | 1 +
 tools/bpf/.gitignore                                                     | 1 +
 tools/bpf/bpftool/.gitignore                                             | 1 +
 tools/bpf/runqslower/.gitignore                                          | 1 +
 tools/build/.gitignore                                                   | 1 +
 tools/build/feature/.gitignore                                           | 1 +
 tools/cgroup/.gitignore                                                  | 1 +
 tools/gpio/.gitignore                                                    | 1 +
 tools/iio/.gitignore                                                     | 1 +
 tools/laptop/dslm/.gitignore                                             | 1 +
 tools/leds/.gitignore                                                    | 1 +
 tools/lib/bpf/.gitignore                                                 | 1 +
 tools/lib/lockdep/.gitignore                                             | 1 +
 tools/lib/traceevent/.gitignore                                          | 1 +
 tools/memory-model/.gitignore                                            | 1 +
 tools/memory-model/litmus-tests/.gitignore                               | 1 +
 tools/objtool/.gitignore                                                 | 1 +
 tools/pcmcia/.gitignore                                                  | 1 +
 tools/perf/.gitignore                                                    | 1 +
 tools/perf/tests/.gitignore                                              | 1 +
 tools/power/acpi/.gitignore                                              | 1 +
 tools/power/cpupower/.gitignore                                          | 1 +
 tools/power/x86/intel-speed-select/.gitignore                            | 1 +
 tools/power/x86/turbostat/.gitignore                                     | 1 +
 tools/spi/.gitignore                                                     | 1 +
 tools/testing/kunit/.gitignore                                           | 1 +
 tools/testing/radix-tree/.gitignore                                      | 1 +
 tools/testing/selftests/.gitignore                                       | 1 +
 tools/testing/selftests/android/ion/.gitignore                           | 1 +
 tools/testing/selftests/arm64/signal/.gitignore                          | 1 +
 tools/testing/selftests/arm64/tags/.gitignore                            | 1 +
 tools/testing/selftests/bpf/.gitignore                                   | 1 +
 tools/testing/selftests/bpf/map_tests/.gitignore                         | 1 +
 tools/testing/selftests/bpf/prog_tests/.gitignore                        | 1 +
 tools/testing/selftests/bpf/verifier/.gitignore                          | 1 +
 tools/testing/selftests/breakpoints/.gitignore                           | 1 +
 tools/testing/selftests/capabilities/.gitignore                          | 1 +
 tools/testing/selftests/cgroup/.gitignore                                | 1 +
 tools/testing/selftests/clone3/.gitignore                                | 1 +
 tools/testing/selftests/drivers/.gitignore                               | 1 +
 tools/testing/selftests/efivarfs/.gitignore                              | 1 +
 tools/testing/selftests/exec/.gitignore                                  | 1 +
 tools/testing/selftests/filesystems/.gitignore                           | 1 +
 tools/testing/selftests/filesystems/binderfs/.gitignore                  | 1 +
 tools/testing/selftests/filesystems/epoll/.gitignore                     | 1 +
 tools/testing/selftests/ftrace/.gitignore                                | 1 +
 tools/testing/selftests/futex/functional/.gitignore                      | 1 +
 tools/testing/selftests/gpio/.gitignore                                  | 1 +
 tools/testing/selftests/ia64/.gitignore                                  | 1 +
 tools/testing/selftests/intel_pstate/.gitignore                          | 1 +
 tools/testing/selftests/ipc/.gitignore                                   | 1 +
 tools/testing/selftests/ir/.gitignore                                    | 1 +
 tools/testing/selftests/kcmp/.gitignore                                  | 1 +
 tools/testing/selftests/kvm/.gitignore                                   | 1 +
 tools/testing/selftests/media_tests/.gitignore                           | 1 +
 tools/testing/selftests/membarrier/.gitignore                            | 1 +
 tools/testing/selftests/memfd/.gitignore                                 | 1 +
 tools/testing/selftests/mount/.gitignore                                 | 1 +
 tools/testing/selftests/mqueue/.gitignore                                | 1 +
 tools/testing/selftests/net/.gitignore                                   | 1 +
 tools/testing/selftests/net/forwarding/.gitignore                        | 1 +
 tools/testing/selftests/net/mptcp/.gitignore                             | 1 +
 tools/testing/selftests/networking/timestamping/.gitignore               | 1 +
 tools/testing/selftests/nsfs/.gitignore                                  | 1 +
 tools/testing/selftests/openat2/.gitignore                               | 1 +
 tools/testing/selftests/pidfd/.gitignore                                 | 1 +
 tools/testing/selftests/powerpc/alignment/.gitignore                     | 1 +
 tools/testing/selftests/powerpc/benchmarks/.gitignore                    | 1 +
 tools/testing/selftests/powerpc/cache_shape/.gitignore                   | 1 +
 tools/testing/selftests/powerpc/copyloops/.gitignore                     | 1 +
 tools/testing/selftests/powerpc/dscr/.gitignore                          | 1 +
 tools/testing/selftests/powerpc/math/.gitignore                          | 1 +
 tools/testing/selftests/powerpc/mm/.gitignore                            | 1 +
 tools/testing/selftests/powerpc/pmu/.gitignore                           | 1 +
 tools/testing/selftests/powerpc/pmu/ebb/.gitignore                       | 1 +
 tools/testing/selftests/powerpc/primitives/.gitignore                    | 1 +
 tools/testing/selftests/powerpc/ptrace/.gitignore                        | 1 +
 tools/testing/selftests/powerpc/security/.gitignore                      | 1 +
 tools/testing/selftests/powerpc/signal/.gitignore                        | 1 +
 tools/testing/selftests/powerpc/stringloops/.gitignore                   | 1 +
 tools/testing/selftests/powerpc/switch_endian/.gitignore                 | 1 +
 tools/testing/selftests/powerpc/syscalls/.gitignore                      | 1 +
 tools/testing/selftests/powerpc/tm/.gitignore                            | 1 +
 tools/testing/selftests/powerpc/vphn/.gitignore                          | 1 +
 tools/testing/selftests/prctl/.gitignore                                 | 1 +
 tools/testing/selftests/proc/.gitignore                                  | 1 +
 tools/testing/selftests/pstore/.gitignore                                | 1 +
 tools/testing/selftests/ptp/.gitignore                                   | 1 +
 tools/testing/selftests/ptrace/.gitignore                                | 1 +
 tools/testing/selftests/rcutorture/.gitignore                            | 1 +
 tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore           | 1 +
 .../selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore       | 1 +
 .../rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore         | 1 +
 tools/testing/selftests/rseq/.gitignore                                  | 1 +
 tools/testing/selftests/rtc/.gitignore                                   | 1 +
 tools/testing/selftests/safesetid/.gitignore                             | 1 +
 tools/testing/selftests/seccomp/.gitignore                               | 1 +
 tools/testing/selftests/sigaltstack/.gitignore                           | 1 +
 tools/testing/selftests/size/.gitignore                                  | 1 +
 tools/testing/selftests/sparc64/drivers/.gitignore                       | 1 +
 tools/testing/selftests/splice/.gitignore                                | 1 +
 tools/testing/selftests/sync/.gitignore                                  | 1 +
 tools/testing/selftests/tc-testing/.gitignore                            | 1 +
 tools/testing/selftests/timens/.gitignore                                | 1 +
 tools/testing/selftests/timers/.gitignore                                | 1 +
 tools/testing/selftests/tmpfs/.gitignore                                 | 1 +
 tools/testing/selftests/vDSO/.gitignore                                  | 1 +
 tools/testing/selftests/vm/.gitignore                                    | 1 +
 tools/testing/selftests/watchdog/.gitignore                              | 1 +
 tools/testing/selftests/wireguard/qemu/.gitignore                        | 1 +
 tools/testing/selftests/x86/.gitignore                                   | 1 +
 tools/testing/vsock/.gitignore                                           | 1 +
 tools/thermal/tmon/.gitignore                                            | 1 +
 tools/usb/.gitignore                                                     | 1 +
 tools/usb/usbip/.gitignore                                               | 1 +
 tools/virtio/.gitignore                                                  | 1 +
 tools/vm/.gitignore                                                      | 1 +
 usr/.gitignore                                                           | 1 +
 usr/include/.gitignore                                                   | 1 +
 246 files changed, 246 insertions(+)

(limited to 'scripts')

diff --git a/.gitignore b/.gitignore
index 72ef86a5570d..2258e906f01c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # NOTE! Don't add files that are generated in specific
 # subdirectories here. Add them in the ".gitignore" file
diff --git a/Documentation/.gitignore b/Documentation/.gitignore
index e74fec8693b2..d6dc7c9b8e25 100644
--- a/Documentation/.gitignore
+++ b/Documentation/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 output
 *.pyc
diff --git a/Documentation/devicetree/bindings/.gitignore b/Documentation/devicetree/bindings/.gitignore
index ef82fcfcccab..66878559822b 100644
--- a/Documentation/devicetree/bindings/.gitignore
+++ b/Documentation/devicetree/bindings/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.example.dts
 processed-schema.yaml
diff --git a/Documentation/vm/.gitignore b/Documentation/vm/.gitignore
index 09b164a5700f..bc74f5643008 100644
--- a/Documentation/vm/.gitignore
+++ b/Documentation/vm/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 page-types
 slabinfo
diff --git a/arch/.gitignore b/arch/.gitignore
index 741468920320..4191da401dbb 100644
--- a/arch/.gitignore
+++ b/arch/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 i386
 x86_64
diff --git a/arch/alpha/kernel/.gitignore b/arch/alpha/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/alpha/kernel/.gitignore
+++ b/arch/alpha/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/arc/boot/.gitignore b/arch/arc/boot/.gitignore
index c4c5fd529c25..675db1494028 100644
--- a/arch/arc/boot/.gitignore
+++ b/arch/arc/boot/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 uImage
diff --git a/arch/arc/kernel/.gitignore b/arch/arc/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/arc/kernel/.gitignore
+++ b/arch/arc/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/arm/boot/.gitignore b/arch/arm/boot/.gitignore
index ce1c5ff746e7..8c759326baf4 100644
--- a/arch/arm/boot/.gitignore
+++ b/arch/arm/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 Image
 zImage
 xipImage
diff --git a/arch/arm/boot/compressed/.gitignore b/arch/arm/boot/compressed/.gitignore
index 86b2f5d28240..db05c6ef3e31 100644
--- a/arch/arm/boot/compressed/.gitignore
+++ b/arch/arm/boot/compressed/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ashldi3.S
 bswapsdi2.S
 font.c
diff --git a/arch/arm/crypto/.gitignore b/arch/arm/crypto/.gitignore
index 31e1f538df7d..790e204050ba 100644
--- a/arch/arm/crypto/.gitignore
+++ b/arch/arm/crypto/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 aesbs-core.S
 sha256-core.S
 sha512-core.S
diff --git a/arch/arm/kernel/.gitignore b/arch/arm/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/arm/kernel/.gitignore
+++ b/arch/arm/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/arm/mach-at91/.gitignore b/arch/arm/mach-at91/.gitignore
index 2ecd6f51c8a9..f6d47389675e 100644
--- a/arch/arm/mach-at91/.gitignore
+++ b/arch/arm/mach-at91/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 pm_data-offsets.h
diff --git a/arch/arm/mach-omap2/.gitignore b/arch/arm/mach-omap2/.gitignore
index 79a8d6ea7152..dc7be7556736 100644
--- a/arch/arm/mach-omap2/.gitignore
+++ b/arch/arm/mach-omap2/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 pm-asm-offsets.h
diff --git a/arch/arm/vdso/.gitignore b/arch/arm/vdso/.gitignore
index 6b47f6e0b032..dfa06f5365cf 100644
--- a/arch/arm/vdso/.gitignore
+++ b/arch/arm/vdso/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdso.so.raw
 vdsomunge
diff --git a/arch/arm64/boot/.gitignore b/arch/arm64/boot/.gitignore
index 8dab0bb6ae66..9a7a9009d43a 100644
--- a/arch/arm64/boot/.gitignore
+++ b/arch/arm64/boot/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 Image
 Image.gz
diff --git a/arch/arm64/crypto/.gitignore b/arch/arm64/crypto/.gitignore
index 879df8781ed5..a11a86217ffb 100644
--- a/arch/arm64/crypto/.gitignore
+++ b/arch/arm64/crypto/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 sha256-core.S
 sha512-core.S
diff --git a/arch/arm64/kernel/.gitignore b/arch/arm64/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/arm64/kernel/.gitignore
+++ b/arch/arm64/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/arm64/kernel/vdso/.gitignore b/arch/arm64/kernel/vdso/.gitignore
index f8b69d84238e..652e31d82582 100644
--- a/arch/arm64/kernel/vdso/.gitignore
+++ b/arch/arm64/kernel/vdso/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
diff --git a/arch/arm64/kernel/vdso32/.gitignore b/arch/arm64/kernel/vdso32/.gitignore
index 4fea950fa5ed..3542fa24e26b 100644
--- a/arch/arm64/kernel/vdso32/.gitignore
+++ b/arch/arm64/kernel/vdso32/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdso.so.raw
diff --git a/arch/ia64/kernel/.gitignore b/arch/ia64/kernel/.gitignore
index 21cb0da5ded8..0374827206e7 100644
--- a/arch/ia64/kernel/.gitignore
+++ b/arch/ia64/kernel/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gate.lds
 vmlinux.lds
diff --git a/arch/m68k/kernel/.gitignore b/arch/m68k/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/m68k/kernel/.gitignore
+++ b/arch/m68k/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/microblaze/boot/.gitignore b/arch/microblaze/boot/.gitignore
index 679502d64a97..11a9e229f3c0 100644
--- a/arch/microblaze/boot/.gitignore
+++ b/arch/microblaze/boot/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 linux.bin*
 simpleImage.*
diff --git a/arch/microblaze/kernel/.gitignore b/arch/microblaze/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/microblaze/kernel/.gitignore
+++ b/arch/microblaze/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/mips/boot/.gitignore b/arch/mips/boot/.gitignore
index a73d6e2c4f64..2adc8581a175 100644
--- a/arch/mips/boot/.gitignore
+++ b/arch/mips/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mkboot
 elf2ecoff
 vmlinux.*
diff --git a/arch/mips/boot/compressed/.gitignore b/arch/mips/boot/compressed/.gitignore
index ebae133f1d00..d358395614c9 100644
--- a/arch/mips/boot/compressed/.gitignore
+++ b/arch/mips/boot/compressed/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ashldi3.c
 bswapsi.c
diff --git a/arch/mips/boot/tools/.gitignore b/arch/mips/boot/tools/.gitignore
index be0ed065249b..d36dc7cf9115 100644
--- a/arch/mips/boot/tools/.gitignore
+++ b/arch/mips/boot/tools/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 relocs
diff --git a/arch/mips/kernel/.gitignore b/arch/mips/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/mips/kernel/.gitignore
+++ b/arch/mips/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/mips/tools/.gitignore b/arch/mips/tools/.gitignore
index b0209450d9ff..794817dfb389 100644
--- a/arch/mips/tools/.gitignore
+++ b/arch/mips/tools/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 elf-entry
 loongson3-llsc-check
diff --git a/arch/mips/vdso/.gitignore b/arch/mips/vdso/.gitignore
index 5286a7d73d79..1f43f6dd8142 100644
--- a/arch/mips/vdso/.gitignore
+++ b/arch/mips/vdso/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.so*
 vdso-*image.c
 genvdso
diff --git a/arch/nds32/kernel/.gitignore b/arch/nds32/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/nds32/kernel/.gitignore
+++ b/arch/nds32/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/nds32/kernel/vdso/.gitignore b/arch/nds32/kernel/vdso/.gitignore
index f8b69d84238e..652e31d82582 100644
--- a/arch/nds32/kernel/vdso/.gitignore
+++ b/arch/nds32/kernel/vdso/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
diff --git a/arch/nios2/boot/.gitignore b/arch/nios2/boot/.gitignore
index 64386a8dedd8..ef37cac5bcc0 100644
--- a/arch/nios2/boot/.gitignore
+++ b/arch/nios2/boot/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmImage
diff --git a/arch/nios2/kernel/.gitignore b/arch/nios2/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/nios2/kernel/.gitignore
+++ b/arch/nios2/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/openrisc/kernel/.gitignore b/arch/openrisc/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/openrisc/kernel/.gitignore
+++ b/arch/openrisc/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/parisc/boot/.gitignore b/arch/parisc/boot/.gitignore
index 017d5912ad2d..adf2ae0e7eda 100644
--- a/arch/parisc/boot/.gitignore
+++ b/arch/parisc/boot/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 image
 bzImage
diff --git a/arch/parisc/boot/compressed/.gitignore b/arch/parisc/boot/compressed/.gitignore
index 926cd41c1069..b9853a356ab2 100644
--- a/arch/parisc/boot/compressed/.gitignore
+++ b/arch/parisc/boot/compressed/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 firmware.c
 real2.S
 sizes.h
diff --git a/arch/parisc/kernel/.gitignore b/arch/parisc/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/parisc/kernel/.gitignore
+++ b/arch/parisc/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/powerpc/boot/.gitignore b/arch/powerpc/boot/.gitignore
index 6610665fcf5e..1eee61b82341 100644
--- a/arch/powerpc/boot/.gitignore
+++ b/arch/powerpc/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 addnote
 decompress_inflate.c
 empty.c
diff --git a/arch/powerpc/kernel/.gitignore b/arch/powerpc/kernel/.gitignore
index 67ebd3003c05..d71179d3ffe9 100644
--- a/arch/powerpc/kernel/.gitignore
+++ b/arch/powerpc/kernel/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 prom_init_check
 vmlinux.lds
diff --git a/arch/powerpc/kernel/vdso32/.gitignore b/arch/powerpc/kernel/vdso32/.gitignore
index fea5809857a5..824b863ec6bd 100644
--- a/arch/powerpc/kernel/vdso32/.gitignore
+++ b/arch/powerpc/kernel/vdso32/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso32.lds
 vdso32.so.dbg
diff --git a/arch/powerpc/kernel/vdso64/.gitignore b/arch/powerpc/kernel/vdso64/.gitignore
index 77a0b423642c..84151a7ba31d 100644
--- a/arch/powerpc/kernel/vdso64/.gitignore
+++ b/arch/powerpc/kernel/vdso64/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso64.lds
 vdso64.so.dbg
diff --git a/arch/powerpc/platforms/cell/spufs/.gitignore b/arch/powerpc/platforms/cell/spufs/.gitignore
index a09ee8d84d6c..5f3eb224f653 100644
--- a/arch/powerpc/platforms/cell/spufs/.gitignore
+++ b/arch/powerpc/platforms/cell/spufs/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 spu_save_dump.h
 spu_restore_dump.h
diff --git a/arch/powerpc/purgatory/.gitignore b/arch/powerpc/purgatory/.gitignore
index e9e66f178a6d..b8dc6ff34254 100644
--- a/arch/powerpc/purgatory/.gitignore
+++ b/arch/powerpc/purgatory/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 kexec-purgatory.c
 purgatory.ro
diff --git a/arch/riscv/boot/.gitignore b/arch/riscv/boot/.gitignore
index 8a45a37d2af4..574c10f8ff68 100644
--- a/arch/riscv/boot/.gitignore
+++ b/arch/riscv/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 Image
 Image.gz
 loader
diff --git a/arch/riscv/kernel/.gitignore b/arch/riscv/kernel/.gitignore
index b51634f6a7cd..e052ed331cc1 100644
--- a/arch/riscv/kernel/.gitignore
+++ b/arch/riscv/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /vmlinux.lds
diff --git a/arch/riscv/kernel/vdso/.gitignore b/arch/riscv/kernel/vdso/.gitignore
index 97c2d69d0289..11ebee9e4c1d 100644
--- a/arch/riscv/kernel/vdso/.gitignore
+++ b/arch/riscv/kernel/vdso/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 *.tmp
diff --git a/arch/s390/boot/.gitignore b/arch/s390/boot/.gitignore
index 16ff906e4610..b265bfede188 100644
--- a/arch/s390/boot/.gitignore
+++ b/arch/s390/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 image
 bzImage
 section_cmp.*
diff --git a/arch/s390/boot/compressed/.gitignore b/arch/s390/boot/compressed/.gitignore
index e72fcd7ecebb..765a08f1bd77 100644
--- a/arch/s390/boot/compressed/.gitignore
+++ b/arch/s390/boot/compressed/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux
 vmlinux.lds
diff --git a/arch/s390/kernel/.gitignore b/arch/s390/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/s390/kernel/.gitignore
+++ b/arch/s390/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/s390/kernel/vdso64/.gitignore b/arch/s390/kernel/vdso64/.gitignore
index 3fd18cf9fec2..4ec80685fecc 100644
--- a/arch/s390/kernel/vdso64/.gitignore
+++ b/arch/s390/kernel/vdso64/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso64.lds
diff --git a/arch/s390/purgatory/.gitignore b/arch/s390/purgatory/.gitignore
index c82157f46b18..97ca52779457 100644
--- a/arch/s390/purgatory/.gitignore
+++ b/arch/s390/purgatory/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 purgatory
 purgatory.chk
 purgatory.lds
diff --git a/arch/s390/tools/.gitignore b/arch/s390/tools/.gitignore
index 71bd6f8eebaf..ea62f37b79ef 100644
--- a/arch/s390/tools/.gitignore
+++ b/arch/s390/tools/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gen_facilities
 gen_opcode_table
diff --git a/arch/sh/boot/.gitignore b/arch/sh/boot/.gitignore
index f50fdd9975c5..6603bbbc917d 100644
--- a/arch/sh/boot/.gitignore
+++ b/arch/sh/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 zImage
 vmlinux*
 uImage*
diff --git a/arch/sh/boot/compressed/.gitignore b/arch/sh/boot/compressed/.gitignore
index edff113f1b85..37aa53057369 100644
--- a/arch/sh/boot/compressed/.gitignore
+++ b/arch/sh/boot/compressed/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ashiftrt.S
 ashldi3.c
 ashlsi3.S
diff --git a/arch/sh/kernel/.gitignore b/arch/sh/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/sh/kernel/.gitignore
+++ b/arch/sh/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/sh/kernel/vsyscall/.gitignore b/arch/sh/kernel/vsyscall/.gitignore
index 40836ad9079c..530a3031a88d 100644
--- a/arch/sh/kernel/vsyscall/.gitignore
+++ b/arch/sh/kernel/vsyscall/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vsyscall.lds
diff --git a/arch/sparc/boot/.gitignore b/arch/sparc/boot/.gitignore
index fc6f3986c76c..f3d8569a21d1 100644
--- a/arch/sparc/boot/.gitignore
+++ b/arch/sparc/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 btfix.S
 btfixupprep
 image
diff --git a/arch/sparc/kernel/.gitignore b/arch/sparc/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/sparc/kernel/.gitignore
+++ b/arch/sparc/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/arch/sparc/vdso/.gitignore b/arch/sparc/vdso/.gitignore
index ef925b998222..8d4ebc990bf3 100644
--- a/arch/sparc/vdso/.gitignore
+++ b/arch/sparc/vdso/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdso-image-*.c
 vdso2c
diff --git a/arch/sparc/vdso/vdso32/.gitignore b/arch/sparc/vdso/vdso32/.gitignore
index e45fba9d0ced..5167384843b9 100644
--- a/arch/sparc/vdso/vdso32/.gitignore
+++ b/arch/sparc/vdso/vdso32/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso32.lds
diff --git a/arch/um/.gitignore b/arch/um/.gitignore
index a73d3a1cc746..6323e5571887 100644
--- a/arch/um/.gitignore
+++ b/arch/um/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 kernel/config.c
 kernel/config.tmp
 kernel/vmlinux.lds
diff --git a/arch/unicore32/.gitignore b/arch/unicore32/.gitignore
index 947e99c2a957..e82f3fb57ba0 100644
--- a/arch/unicore32/.gitignore
+++ b/arch/unicore32/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Generated include files
 #
diff --git a/arch/x86/.gitignore b/arch/x86/.gitignore
index 5a82bac5e0bc..677111acbaa3 100644
--- a/arch/x86/.gitignore
+++ b/arch/x86/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 boot/compressed/vmlinux
 tools/test_get_len
 tools/insn_sanity
diff --git a/arch/x86/boot/.gitignore b/arch/x86/boot/.gitignore
index 09d25dd09307..9cc7f1357b9b 100644
--- a/arch/x86/boot/.gitignore
+++ b/arch/x86/boot/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 bootsect
 bzImage
 cpustr.h
diff --git a/arch/x86/boot/compressed/.gitignore b/arch/x86/boot/compressed/.gitignore
index 4a46fab7162e..25805199a506 100644
--- a/arch/x86/boot/compressed/.gitignore
+++ b/arch/x86/boot/compressed/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 relocs
 vmlinux.bin.all
 vmlinux.relocs
diff --git a/arch/x86/boot/tools/.gitignore b/arch/x86/boot/tools/.gitignore
index 378eac25d311..ae91f4d0d78b 100644
--- a/arch/x86/boot/tools/.gitignore
+++ b/arch/x86/boot/tools/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 build
diff --git a/arch/x86/crypto/.gitignore b/arch/x86/crypto/.gitignore
index 30be0400a439..580c839bb177 100644
--- a/arch/x86/crypto/.gitignore
+++ b/arch/x86/crypto/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 poly1305-x86_64-cryptogams.S
diff --git a/arch/x86/entry/vdso/.gitignore b/arch/x86/entry/vdso/.gitignore
index aae8ffdd5880..37a6129d597b 100644
--- a/arch/x86/entry/vdso/.gitignore
+++ b/arch/x86/entry/vdso/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
 vdsox32.lds
 vdso32-syscall-syms.lds
diff --git a/arch/x86/entry/vdso/vdso32/.gitignore b/arch/x86/entry/vdso/vdso32/.gitignore
index e45fba9d0ced..5167384843b9 100644
--- a/arch/x86/entry/vdso/vdso32/.gitignore
+++ b/arch/x86/entry/vdso/vdso32/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso32.lds
diff --git a/arch/x86/kernel/.gitignore b/arch/x86/kernel/.gitignore
index 08f4fd731469..ef66569e7e22 100644
--- a/arch/x86/kernel/.gitignore
+++ b/arch/x86/kernel/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vsyscall.lds
 vsyscall_32.lds
 vmlinux.lds
diff --git a/arch/x86/kernel/cpu/.gitignore b/arch/x86/kernel/cpu/.gitignore
index 667df55a4399..0bca7ef7426a 100644
--- a/arch/x86/kernel/cpu/.gitignore
+++ b/arch/x86/kernel/cpu/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 capflags.c
diff --git a/arch/x86/lib/.gitignore b/arch/x86/lib/.gitignore
index 8df89f0a3fe6..8ae0f93ecbfd 100644
--- a/arch/x86/lib/.gitignore
+++ b/arch/x86/lib/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 inat-tables.c
diff --git a/arch/x86/realmode/rm/.gitignore b/arch/x86/realmode/rm/.gitignore
index b6ed3a2555cb..6c3464f46166 100644
--- a/arch/x86/realmode/rm/.gitignore
+++ b/arch/x86/realmode/rm/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 pasyms.h
 realmode.lds
 realmode.relocs
diff --git a/arch/x86/tools/.gitignore b/arch/x86/tools/.gitignore
index be0ed065249b..d36dc7cf9115 100644
--- a/arch/x86/tools/.gitignore
+++ b/arch/x86/tools/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 relocs
diff --git a/arch/x86/um/vdso/.gitignore b/arch/x86/um/vdso/.gitignore
index f8b69d84238e..652e31d82582 100644
--- a/arch/x86/um/vdso/.gitignore
+++ b/arch/x86/um/vdso/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso.lds
diff --git a/arch/xtensa/boot/.gitignore b/arch/xtensa/boot/.gitignore
index 38177c7ebcab..615f1f741a03 100644
--- a/arch/xtensa/boot/.gitignore
+++ b/arch/xtensa/boot/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 uImage
 zImage.redboot
diff --git a/arch/xtensa/boot/boot-elf/.gitignore b/arch/xtensa/boot/boot-elf/.gitignore
index 5ff8fbb8561b..7473404500cc 100644
--- a/arch/xtensa/boot/boot-elf/.gitignore
+++ b/arch/xtensa/boot/boot-elf/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 boot.lds
diff --git a/arch/xtensa/boot/lib/.gitignore b/arch/xtensa/boot/lib/.gitignore
index 1629a6167755..805a8249252a 100644
--- a/arch/xtensa/boot/lib/.gitignore
+++ b/arch/xtensa/boot/lib/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 inffast.c
 inflate.c
 inftrees.c
diff --git a/arch/xtensa/kernel/.gitignore b/arch/xtensa/kernel/.gitignore
index c5f676c3c224..bbb90f92d051 100644
--- a/arch/xtensa/kernel/.gitignore
+++ b/arch/xtensa/kernel/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vmlinux.lds
diff --git a/certs/.gitignore b/certs/.gitignore
index 4d58ba042b37..2a2483990686 100644
--- a/certs/.gitignore
+++ b/certs/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 x509_certificate_list
diff --git a/drivers/atm/.gitignore b/drivers/atm/.gitignore
index 19f3ffbd1d65..ddd374e91965 100644
--- a/drivers/atm/.gitignore
+++ b/drivers/atm/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 fore200e_mkfirm
 fore200e_pca_fw.c
 pca200e.bin
diff --git a/drivers/crypto/vmx/.gitignore b/drivers/crypto/vmx/.gitignore
index af4a7ce4738d..7aa71d83f739 100644
--- a/drivers/crypto/vmx/.gitignore
+++ b/drivers/crypto/vmx/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 aesp8-ppc.S
 ghashp8-ppc.S
diff --git a/drivers/eisa/.gitignore b/drivers/eisa/.gitignore
index 4b335c0aedb0..7d0a2ad5abe2 100644
--- a/drivers/eisa/.gitignore
+++ b/drivers/eisa/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 devlist.h
diff --git a/drivers/gpu/drm/i915/.gitignore b/drivers/gpu/drm/i915/.gitignore
index d9a77f3b59b2..81972dce1aff 100644
--- a/drivers/gpu/drm/i915/.gitignore
+++ b/drivers/gpu/drm/i915/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.hdrtest
diff --git a/drivers/gpu/drm/radeon/.gitignore b/drivers/gpu/drm/radeon/.gitignore
index 403eb3a5891f..9c1a94153983 100644
--- a/drivers/gpu/drm/radeon/.gitignore
+++ b/drivers/gpu/drm/radeon/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mkregtable
 *_reg_safe.h
 
diff --git a/drivers/memory/.gitignore b/drivers/memory/.gitignore
index cbca8b028437..caedc4c7d2db 100644
--- a/drivers/memory/.gitignore
+++ b/drivers/memory/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ti-emif-asm-offsets.h
diff --git a/drivers/net/wan/.gitignore b/drivers/net/wan/.gitignore
index dae3ea6bb18c..247bfbf10912 100644
--- a/drivers/net/wan/.gitignore
+++ b/drivers/net/wan/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 wanxlfw.inc
diff --git a/drivers/scsi/.gitignore b/drivers/scsi/.gitignore
index e2956741fbd1..5f65cb75f534 100644
--- a/drivers/scsi/.gitignore
+++ b/drivers/scsi/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 53c700_d.h
 scsi_devinfo_tbl.c
diff --git a/drivers/scsi/aic7xxx/.gitignore b/drivers/scsi/aic7xxx/.gitignore
index b8ee24d5748a..9aa780221718 100644
--- a/drivers/scsi/aic7xxx/.gitignore
+++ b/drivers/scsi/aic7xxx/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 aic79xx_reg.h
 aic79xx_reg_print.c
 aic79xx_seq.h
diff --git a/drivers/staging/comedi/drivers/ni_routing/tools/.gitignore b/drivers/staging/comedi/drivers/ni_routing/tools/.gitignore
index ef38008280a9..e3ebffcd900e 100644
--- a/drivers/staging/comedi/drivers/ni_routing/tools/.gitignore
+++ b/drivers/staging/comedi/drivers/ni_routing/tools/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 comedi_h.py
 *.pyc
 ni_values.py
diff --git a/drivers/staging/greybus/tools/.gitignore b/drivers/staging/greybus/tools/.gitignore
index 023654c83068..1fd364aba774 100644
--- a/drivers/staging/greybus/tools/.gitignore
+++ b/drivers/staging/greybus/tools/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 loopback_test
diff --git a/drivers/video/logo/.gitignore b/drivers/video/logo/.gitignore
index 1551a75afdbd..5311d207c0b9 100644
--- a/drivers/video/logo/.gitignore
+++ b/drivers/video/logo/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *_mono.c
 *_vga16.c
 *_clut224.c
diff --git a/drivers/zorro/.gitignore b/drivers/zorro/.gitignore
index 34f980bd8ff6..acd6ffb8d77d 100644
--- a/drivers/zorro/.gitignore
+++ b/drivers/zorro/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 devlist.h
 gen-devlist
diff --git a/fs/unicode/.gitignore b/fs/unicode/.gitignore
index 0381e2221480..9b2467e77b2d 100644
--- a/fs/unicode/.gitignore
+++ b/fs/unicode/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mkutf8data
 utf8data.h
diff --git a/kernel/.gitignore b/kernel/.gitignore
index 0a423a3ca2e1..78701ea37c97 100644
--- a/kernel/.gitignore
+++ b/kernel/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 kheaders.md5
 timeconst.h
 hz.bc
diff --git a/kernel/debug/kdb/.gitignore b/kernel/debug/kdb/.gitignore
index 396d12eda9e8..df259542a236 100644
--- a/kernel/debug/kdb/.gitignore
+++ b/kernel/debug/kdb/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gen-kdb_cmds.c
diff --git a/lib/.gitignore b/lib/.gitignore
index 9af73655a239..327cb2c7f2c9 100644
--- a/lib/.gitignore
+++ b/lib/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gen_crc32table
 gen_crc64table
 crc32table.h
diff --git a/lib/raid6/.gitignore b/lib/raid6/.gitignore
index 3de0d8921286..6be57745afd1 100644
--- a/lib/raid6/.gitignore
+++ b/lib/raid6/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mktables
 altivec*.c
 int*.c
diff --git a/net/bpfilter/.gitignore b/net/bpfilter/.gitignore
index e97084e3eea2..f34e85ee8204 100644
--- a/net/bpfilter/.gitignore
+++ b/net/bpfilter/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 bpfilter_umh
diff --git a/net/wireless/.gitignore b/net/wireless/.gitignore
index 61cbc304a3d3..1a29cd69d6cf 100644
--- a/net/wireless/.gitignore
+++ b/net/wireless/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 shipped-certs.c
 extra-certs.c
diff --git a/samples/auxdisplay/.gitignore b/samples/auxdisplay/.gitignore
index 7af222860a96..2ed744c0e741 100644
--- a/samples/auxdisplay/.gitignore
+++ b/samples/auxdisplay/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 cfag12864b-example
diff --git a/samples/bpf/.gitignore b/samples/bpf/.gitignore
index 74d31fd3c99c..23837f2ed458 100644
--- a/samples/bpf/.gitignore
+++ b/samples/bpf/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 cpustat
 fds_example
 hbm
diff --git a/samples/connector/.gitignore b/samples/connector/.gitignore
index d2b9c32accd4..d86f2ff9c947 100644
--- a/samples/connector/.gitignore
+++ b/samples/connector/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ucon
diff --git a/samples/hidraw/.gitignore b/samples/hidraw/.gitignore
index 05e51a685242..d7a6074ebcf9 100644
--- a/samples/hidraw/.gitignore
+++ b/samples/hidraw/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 hid-example
diff --git a/samples/mei/.gitignore b/samples/mei/.gitignore
index f356b81ca1ec..db5e802f041e 100644
--- a/samples/mei/.gitignore
+++ b/samples/mei/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mei-amt-version
diff --git a/samples/mic/mpssd/.gitignore b/samples/mic/mpssd/.gitignore
index 8b7c72f07c92..aa03f1eb37a0 100644
--- a/samples/mic/mpssd/.gitignore
+++ b/samples/mic/mpssd/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mpssd
diff --git a/samples/pidfd/.gitignore b/samples/pidfd/.gitignore
index be52b3ba6e4b..eea857fca736 100644
--- a/samples/pidfd/.gitignore
+++ b/samples/pidfd/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 pidfd-metadata
diff --git a/samples/seccomp/.gitignore b/samples/seccomp/.gitignore
index d1e2e817d556..4a5a5b7db30b 100644
--- a/samples/seccomp/.gitignore
+++ b/samples/seccomp/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 bpf-direct
 bpf-fancy
 dropper
diff --git a/samples/timers/.gitignore b/samples/timers/.gitignore
index c5c45d7ec0df..40510c33cf08 100644
--- a/samples/timers/.gitignore
+++ b/samples/timers/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 hpet_example
diff --git a/samples/vfs/.gitignore b/samples/vfs/.gitignore
index 0806eb0be62d..8fdabf7e5373 100644
--- a/samples/vfs/.gitignore
+++ b/samples/vfs/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 test-fsmount
 test-statx
diff --git a/samples/watchdog/.gitignore b/samples/watchdog/.gitignore
index ff0ebb540333..74153b831244 100644
--- a/samples/watchdog/.gitignore
+++ b/samples/watchdog/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 watchdog-simple
diff --git a/scripts/.gitignore b/scripts/.gitignore
index 9fe29efbcb95..0d1c8e217cd7 100644
--- a/scripts/.gitignore
+++ b/scripts/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 bin2c
 kallsyms
 unifdef
diff --git a/scripts/basic/.gitignore b/scripts/basic/.gitignore
index a776371a3502..98ae1f509592 100644
--- a/scripts/basic/.gitignore
+++ b/scripts/basic/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 fixdep
diff --git a/scripts/dtc/.gitignore b/scripts/dtc/.gitignore
index 2e6e60d64ede..b814e6076bdb 100644
--- a/scripts/dtc/.gitignore
+++ b/scripts/dtc/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 dtc
diff --git a/scripts/gcc-plugins/.gitignore b/scripts/gcc-plugins/.gitignore
index de92ed9e3d83..b04e0f0f033e 100644
--- a/scripts/gcc-plugins/.gitignore
+++ b/scripts/gcc-plugins/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 randomize_layout_seed.h
diff --git a/scripts/gdb/linux/.gitignore b/scripts/gdb/linux/.gitignore
index 2573543842d0..43234cbcb529 100644
--- a/scripts/gdb/linux/.gitignore
+++ b/scripts/gdb/linux/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.pyc
 *.pyo
 constants.py
diff --git a/scripts/genksyms/.gitignore b/scripts/genksyms/.gitignore
index b119c7da2863..999af710f83d 100644
--- a/scripts/genksyms/.gitignore
+++ b/scripts/genksyms/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 genksyms
diff --git a/scripts/kconfig/.gitignore b/scripts/kconfig/.gitignore
index 588988711e07..12a67fdab541 100644
--- a/scripts/kconfig/.gitignore
+++ b/scripts/kconfig/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.moc
 *conf-cfg
 
diff --git a/scripts/mod/.gitignore b/scripts/mod/.gitignore
index 3bd11b603173..07e4a39f90a6 100644
--- a/scripts/mod/.gitignore
+++ b/scripts/mod/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 elfconfig.h
 mk_elfconfig
 modpost
diff --git a/scripts/selinux/genheaders/.gitignore b/scripts/selinux/genheaders/.gitignore
index 4c0b646ff8d5..5fcadd307908 100644
--- a/scripts/selinux/genheaders/.gitignore
+++ b/scripts/selinux/genheaders/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 genheaders
diff --git a/scripts/selinux/mdp/.gitignore b/scripts/selinux/mdp/.gitignore
index 0d9f827dc14b..a7482287e77f 100644
--- a/scripts/selinux/mdp/.gitignore
+++ b/scripts/selinux/mdp/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mdp
diff --git a/security/apparmor/.gitignore b/security/apparmor/.gitignore
index 0ace1d1dec44..6d1eb1c15c18 100644
--- a/security/apparmor/.gitignore
+++ b/security/apparmor/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 net_names.h
 capability_names.h
 rlim_names.h
diff --git a/security/selinux/.gitignore b/security/selinux/.gitignore
index 2e5040a3d48b..168fae13ca5a 100644
--- a/security/selinux/.gitignore
+++ b/security/selinux/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 av_permissions.h
 flask.h
diff --git a/security/tomoyo/.gitignore b/security/tomoyo/.gitignore
index dc0f220a210b..9f300cdce362 100644
--- a/security/tomoyo/.gitignore
+++ b/security/tomoyo/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 builtin-policy.h
 policy/*.conf
diff --git a/sound/oss/.gitignore b/sound/oss/.gitignore
index 8fd8fd3eff62..ac678430408b 100644
--- a/sound/oss/.gitignore
+++ b/sound/oss/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 pss_boot.h
 trix_boot.h
diff --git a/tools/accounting/.gitignore b/tools/accounting/.gitignore
index 86485203c4ae..c45fb4ed4309 100644
--- a/tools/accounting/.gitignore
+++ b/tools/accounting/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 getdelays
diff --git a/tools/bootconfig/.gitignore b/tools/bootconfig/.gitignore
index e7644dfaa4a7..b77513cae685 100644
--- a/tools/bootconfig/.gitignore
+++ b/tools/bootconfig/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 bootconfig
diff --git a/tools/bpf/.gitignore b/tools/bpf/.gitignore
index 59024197e71d..cf53342175e7 100644
--- a/tools/bpf/.gitignore
+++ b/tools/bpf/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 FEATURE-DUMP.bpf
 feature
 bpf_asm
diff --git a/tools/bpf/bpftool/.gitignore b/tools/bpf/bpftool/.gitignore
index b13926432b84..5c232659a98b 100644
--- a/tools/bpf/bpftool/.gitignore
+++ b/tools/bpf/bpftool/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.d
 /bpftool
 bpftool*.8
diff --git a/tools/bpf/runqslower/.gitignore b/tools/bpf/runqslower/.gitignore
index 90a456a2a72f..ffdb70230c8b 100644
--- a/tools/bpf/runqslower/.gitignore
+++ b/tools/bpf/runqslower/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /.output
diff --git a/tools/build/.gitignore b/tools/build/.gitignore
index a776371a3502..98ae1f509592 100644
--- a/tools/build/.gitignore
+++ b/tools/build/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 fixdep
diff --git a/tools/build/feature/.gitignore b/tools/build/feature/.gitignore
index 09b335b98842..15fcd34acdb9 100644
--- a/tools/build/feature/.gitignore
+++ b/tools/build/feature/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.d
 *.bin
 *.output
diff --git a/tools/cgroup/.gitignore b/tools/cgroup/.gitignore
index 633cd9b874f9..46a82775f2ca 100644
--- a/tools/cgroup/.gitignore
+++ b/tools/cgroup/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 cgroup_event_listener
diff --git a/tools/gpio/.gitignore b/tools/gpio/.gitignore
index a94c0e83b209..d0a66c48865c 100644
--- a/tools/gpio/.gitignore
+++ b/tools/gpio/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gpio-event-mon
 gpio-hammer
 lsgpio
diff --git a/tools/iio/.gitignore b/tools/iio/.gitignore
index 3758202618bd..5bd6f4df98b7 100644
--- a/tools/iio/.gitignore
+++ b/tools/iio/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 iio_event_monitor
 iio_generic_buffer
 lsiio
diff --git a/tools/laptop/dslm/.gitignore b/tools/laptop/dslm/.gitignore
index 9fc984e64386..f7f1296b96ae 100644
--- a/tools/laptop/dslm/.gitignore
+++ b/tools/laptop/dslm/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 dslm
diff --git a/tools/leds/.gitignore b/tools/leds/.gitignore
index ac96d9f53dfc..06bd3ee1b7c9 100644
--- a/tools/leds/.gitignore
+++ b/tools/leds/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 uledmon
diff --git a/tools/lib/bpf/.gitignore b/tools/lib/bpf/.gitignore
index e97c2ebcf447..8a81b3679d2b 100644
--- a/tools/lib/bpf/.gitignore
+++ b/tools/lib/bpf/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 libbpf_version.h
 libbpf.pc
 FEATURE-DUMP.libbpf
diff --git a/tools/lib/lockdep/.gitignore b/tools/lib/lockdep/.gitignore
index cc0e7a9f99e3..6c308ac4388c 100644
--- a/tools/lib/lockdep/.gitignore
+++ b/tools/lib/lockdep/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 liblockdep.so.*
diff --git a/tools/lib/traceevent/.gitignore b/tools/lib/traceevent/.gitignore
index 9e9f25fb1922..7123c70b9ebc 100644
--- a/tools/lib/traceevent/.gitignore
+++ b/tools/lib/traceevent/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 TRACEEVENT-CFLAGS
 libtraceevent-dynamic-list
 libtraceevent.so.*
diff --git a/tools/memory-model/.gitignore b/tools/memory-model/.gitignore
index b1d34c52f3c3..cf4cd66d8fbf 100644
--- a/tools/memory-model/.gitignore
+++ b/tools/memory-model/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 litmus
diff --git a/tools/memory-model/litmus-tests/.gitignore b/tools/memory-model/litmus-tests/.gitignore
index 6e2ddc54152f..c492a1ddad91 100644
--- a/tools/memory-model/litmus-tests/.gitignore
+++ b/tools/memory-model/litmus-tests/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.litmus.out
diff --git a/tools/objtool/.gitignore b/tools/objtool/.gitignore
index 914cff12899b..45cefda24c7b 100644
--- a/tools/objtool/.gitignore
+++ b/tools/objtool/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 arch/x86/lib/inat-tables.c
 objtool
 fixdep
diff --git a/tools/pcmcia/.gitignore b/tools/pcmcia/.gitignore
index 53d081336757..94cb97b77f06 100644
--- a/tools/pcmcia/.gitignore
+++ b/tools/pcmcia/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 crc32hash
diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index bf1252dc2cb0..f3f84781fd74 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 PERF-CFLAGS
 PERF-GUI-VARS
 PERF-VERSION-FILE
diff --git a/tools/perf/tests/.gitignore b/tools/perf/tests/.gitignore
index 8cc30e731c73..d053b325f728 100644
--- a/tools/perf/tests/.gitignore
+++ b/tools/perf/tests/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 llvm-src-base.c
 llvm-src-kbuild.c
 llvm-src-prologue.c
diff --git a/tools/power/acpi/.gitignore b/tools/power/acpi/.gitignore
index f698a0e5bfa6..0b319fc8bb17 100644
--- a/tools/power/acpi/.gitignore
+++ b/tools/power/acpi/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /acpidbg
 /acpidump
 /ec
diff --git a/tools/power/cpupower/.gitignore b/tools/power/cpupower/.gitignore
index 1f9977cc609c..7677329c42a6 100644
--- a/tools/power/cpupower/.gitignore
+++ b/tools/power/cpupower/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 .libs
 libcpupower.so
 libcpupower.so.*
diff --git a/tools/power/x86/intel-speed-select/.gitignore b/tools/power/x86/intel-speed-select/.gitignore
index f61145925ce9..a814f89fe75f 100644
--- a/tools/power/x86/intel-speed-select/.gitignore
+++ b/tools/power/x86/intel-speed-select/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 include/
 intel-speed-select
diff --git a/tools/power/x86/turbostat/.gitignore b/tools/power/x86/turbostat/.gitignore
index 7521370d3568..e13109b43cd1 100644
--- a/tools/power/x86/turbostat/.gitignore
+++ b/tools/power/x86/turbostat/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 turbostat
diff --git a/tools/spi/.gitignore b/tools/spi/.gitignore
index 4280576397e8..14ddba3d2195 100644
--- a/tools/spi/.gitignore
+++ b/tools/spi/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 spidev_fdx
 spidev_test
diff --git a/tools/testing/kunit/.gitignore b/tools/testing/kunit/.gitignore
index c791ff59a37a..1c63e31f7edf 100644
--- a/tools/testing/kunit/.gitignore
+++ b/tools/testing/kunit/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
\ No newline at end of file
diff --git a/tools/testing/radix-tree/.gitignore b/tools/testing/radix-tree/.gitignore
index 3834899b6693..d971516401e6 100644
--- a/tools/testing/radix-tree/.gitignore
+++ b/tools/testing/radix-tree/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 generated/map-shift.h
 idr.c
 idr-test
diff --git a/tools/testing/selftests/.gitignore b/tools/testing/selftests/.gitignore
index 61df01cdf0b2..ac0505cef4ae 100644
--- a/tools/testing/selftests/.gitignore
+++ b/tools/testing/selftests/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gpiogpio-event-mon
 gpiogpio-hammer
 gpioinclude/
diff --git a/tools/testing/selftests/android/ion/.gitignore b/tools/testing/selftests/android/ion/.gitignore
index 95e8f4561474..78eae9972bb1 100644
--- a/tools/testing/selftests/android/ion/.gitignore
+++ b/tools/testing/selftests/android/ion/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ionapp_export
 ionapp_import
 ionmap_test
diff --git a/tools/testing/selftests/arm64/signal/.gitignore b/tools/testing/selftests/arm64/signal/.gitignore
index 3c5b4e8ff894..78c902045ca7 100644
--- a/tools/testing/selftests/arm64/signal/.gitignore
+++ b/tools/testing/selftests/arm64/signal/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mangle_*
 fake_sigreturn_*
 !*.[ch]
diff --git a/tools/testing/selftests/arm64/tags/.gitignore b/tools/testing/selftests/arm64/tags/.gitignore
index e8fae8d61ed6..f4f6c5112463 100644
--- a/tools/testing/selftests/arm64/tags/.gitignore
+++ b/tools/testing/selftests/arm64/tags/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 tags_test
diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index ec464859c6b6..e759d7eb1297 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 test_verifier
 test_maps
 test_lru_map
diff --git a/tools/testing/selftests/bpf/map_tests/.gitignore b/tools/testing/selftests/bpf/map_tests/.gitignore
index 45984a364647..89c4a3d37544 100644
--- a/tools/testing/selftests/bpf/map_tests/.gitignore
+++ b/tools/testing/selftests/bpf/map_tests/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 tests.h
diff --git a/tools/testing/selftests/bpf/prog_tests/.gitignore b/tools/testing/selftests/bpf/prog_tests/.gitignore
index 45984a364647..89c4a3d37544 100644
--- a/tools/testing/selftests/bpf/prog_tests/.gitignore
+++ b/tools/testing/selftests/bpf/prog_tests/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 tests.h
diff --git a/tools/testing/selftests/bpf/verifier/.gitignore b/tools/testing/selftests/bpf/verifier/.gitignore
index 45984a364647..89c4a3d37544 100644
--- a/tools/testing/selftests/bpf/verifier/.gitignore
+++ b/tools/testing/selftests/bpf/verifier/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 tests.h
diff --git a/tools/testing/selftests/breakpoints/.gitignore b/tools/testing/selftests/breakpoints/.gitignore
index a23bb4a6f06c..def2e97dab9a 100644
--- a/tools/testing/selftests/breakpoints/.gitignore
+++ b/tools/testing/selftests/breakpoints/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 breakpoint_test
 step_after_suspend_test
diff --git a/tools/testing/selftests/capabilities/.gitignore b/tools/testing/selftests/capabilities/.gitignore
index b732dd0d4738..426d9adca67c 100644
--- a/tools/testing/selftests/capabilities/.gitignore
+++ b/tools/testing/selftests/capabilities/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 test_execve
 validate_cap
diff --git a/tools/testing/selftests/cgroup/.gitignore b/tools/testing/selftests/cgroup/.gitignore
index 7f9835624793..aa6de65b0838 100644
--- a/tools/testing/selftests/cgroup/.gitignore
+++ b/tools/testing/selftests/cgroup/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 test_memcontrol
 test_core
 test_freezer
diff --git a/tools/testing/selftests/clone3/.gitignore b/tools/testing/selftests/clone3/.gitignore
index 0dc4f32c6cb8..a81085742d40 100644
--- a/tools/testing/selftests/clone3/.gitignore
+++ b/tools/testing/selftests/clone3/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 clone3
 clone3_clear_sighand
 clone3_set_tid
diff --git a/tools/testing/selftests/drivers/.gitignore b/tools/testing/selftests/drivers/.gitignore
index f6aebcc27b76..ca74f2e1c719 100644
--- a/tools/testing/selftests/drivers/.gitignore
+++ b/tools/testing/selftests/drivers/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /dma-buf/udmabuf
diff --git a/tools/testing/selftests/efivarfs/.gitignore b/tools/testing/selftests/efivarfs/.gitignore
index 33618493562b..807407f7f58b 100644
--- a/tools/testing/selftests/efivarfs/.gitignore
+++ b/tools/testing/selftests/efivarfs/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 create-read
 open-unlink
diff --git a/tools/testing/selftests/exec/.gitignore b/tools/testing/selftests/exec/.gitignore
index b02279da6fa1..c078ece12ff0 100644
--- a/tools/testing/selftests/exec/.gitignore
+++ b/tools/testing/selftests/exec/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 subdir*
 script*
 execveat
diff --git a/tools/testing/selftests/filesystems/.gitignore b/tools/testing/selftests/filesystems/.gitignore
index 8449cf6716ce..f0c0ff20d6cf 100644
--- a/tools/testing/selftests/filesystems/.gitignore
+++ b/tools/testing/selftests/filesystems/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 dnotify_test
 devpts_pts
diff --git a/tools/testing/selftests/filesystems/binderfs/.gitignore b/tools/testing/selftests/filesystems/binderfs/.gitignore
index 8a5d9bf63dd4..8e5cf9084894 100644
--- a/tools/testing/selftests/filesystems/binderfs/.gitignore
+++ b/tools/testing/selftests/filesystems/binderfs/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 binderfs_test
diff --git a/tools/testing/selftests/filesystems/epoll/.gitignore b/tools/testing/selftests/filesystems/epoll/.gitignore
index 9ae8db44ec14..9090157258b1 100644
--- a/tools/testing/selftests/filesystems/epoll/.gitignore
+++ b/tools/testing/selftests/filesystems/epoll/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 epoll_wakeup_test
diff --git a/tools/testing/selftests/ftrace/.gitignore b/tools/testing/selftests/ftrace/.gitignore
index 98d8a5a63049..2659417cb2c7 100644
--- a/tools/testing/selftests/ftrace/.gitignore
+++ b/tools/testing/selftests/ftrace/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 logs
diff --git a/tools/testing/selftests/futex/functional/.gitignore b/tools/testing/selftests/futex/functional/.gitignore
index a09f57061902..0efcd494daab 100644
--- a/tools/testing/selftests/futex/functional/.gitignore
+++ b/tools/testing/selftests/futex/functional/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 futex_requeue_pi
 futex_requeue_pi_mismatched_ops
 futex_requeue_pi_signal_restart
diff --git a/tools/testing/selftests/gpio/.gitignore b/tools/testing/selftests/gpio/.gitignore
index 7d14f743d1a4..4c69408f3e84 100644
--- a/tools/testing/selftests/gpio/.gitignore
+++ b/tools/testing/selftests/gpio/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gpio-mockup-chardev
diff --git a/tools/testing/selftests/ia64/.gitignore b/tools/testing/selftests/ia64/.gitignore
index ab806edc8732..e962fb2a08d5 100644
--- a/tools/testing/selftests/ia64/.gitignore
+++ b/tools/testing/selftests/ia64/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 aliasing-test
diff --git a/tools/testing/selftests/intel_pstate/.gitignore b/tools/testing/selftests/intel_pstate/.gitignore
index 3bfcbae5fa13..862de222a3f3 100644
--- a/tools/testing/selftests/intel_pstate/.gitignore
+++ b/tools/testing/selftests/intel_pstate/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 aperf
 msr
diff --git a/tools/testing/selftests/ipc/.gitignore b/tools/testing/selftests/ipc/.gitignore
index 9af04c9353c0..9ed280e4c704 100644
--- a/tools/testing/selftests/ipc/.gitignore
+++ b/tools/testing/selftests/ipc/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 msgque_test
 msgque
diff --git a/tools/testing/selftests/ir/.gitignore b/tools/testing/selftests/ir/.gitignore
index 070ea0c75fb8..0bbada8c1811 100644
--- a/tools/testing/selftests/ir/.gitignore
+++ b/tools/testing/selftests/ir/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ir_loopback
diff --git a/tools/testing/selftests/kcmp/.gitignore b/tools/testing/selftests/kcmp/.gitignore
index 5a9b3732b2de..38ccdfe80ef7 100644
--- a/tools/testing/selftests/kcmp/.gitignore
+++ b/tools/testing/selftests/kcmp/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 kcmp_test
 kcmp-test-file
diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore
index 30072c3f52fb..2f85dc944fbd 100644
--- a/tools/testing/selftests/kvm/.gitignore
+++ b/tools/testing/selftests/kvm/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /s390x/sync_regs_test
 /s390x/memop
 /x86_64/cr4_cpuid_sync_test
diff --git a/tools/testing/selftests/media_tests/.gitignore b/tools/testing/selftests/media_tests/.gitignore
index 8745eba39012..da438e780ffe 100644
--- a/tools/testing/selftests/media_tests/.gitignore
+++ b/tools/testing/selftests/media_tests/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 media_device_test
 media_device_open
 video_device_test
diff --git a/tools/testing/selftests/membarrier/.gitignore b/tools/testing/selftests/membarrier/.gitignore
index f2f7ec0a99b4..f2fbba178601 100644
--- a/tools/testing/selftests/membarrier/.gitignore
+++ b/tools/testing/selftests/membarrier/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 membarrier_test_multi_thread
 membarrier_test_single_thread
diff --git a/tools/testing/selftests/memfd/.gitignore b/tools/testing/selftests/memfd/.gitignore
index afe87c40ac80..dd9a051f608e 100644
--- a/tools/testing/selftests/memfd/.gitignore
+++ b/tools/testing/selftests/memfd/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 fuse_mnt
 fuse_test
 memfd_test
diff --git a/tools/testing/selftests/mount/.gitignore b/tools/testing/selftests/mount/.gitignore
index 856ad4107eb3..0bc64a6d4c18 100644
--- a/tools/testing/selftests/mount/.gitignore
+++ b/tools/testing/selftests/mount/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 unprivileged-remount-test
diff --git a/tools/testing/selftests/mqueue/.gitignore b/tools/testing/selftests/mqueue/.gitignore
index d8d42377205a..72ad8ca691c9 100644
--- a/tools/testing/selftests/mqueue/.gitignore
+++ b/tools/testing/selftests/mqueue/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mq_open_tests
 mq_perf_tests
diff --git a/tools/testing/selftests/net/.gitignore b/tools/testing/selftests/net/.gitignore
index ecc52d4c034d..08ad1a7109e2 100644
--- a/tools/testing/selftests/net/.gitignore
+++ b/tools/testing/selftests/net/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 msg_zerocopy
 socket
 psock_fanout
diff --git a/tools/testing/selftests/net/forwarding/.gitignore b/tools/testing/selftests/net/forwarding/.gitignore
index a793eef5b876..2dea317f12e7 100644
--- a/tools/testing/selftests/net/forwarding/.gitignore
+++ b/tools/testing/selftests/net/forwarding/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 forwarding.config
diff --git a/tools/testing/selftests/net/mptcp/.gitignore b/tools/testing/selftests/net/mptcp/.gitignore
index d72f07642738..beea6541fb21 100644
--- a/tools/testing/selftests/net/mptcp/.gitignore
+++ b/tools/testing/selftests/net/mptcp/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 mptcp_connect
 *.pcap
diff --git a/tools/testing/selftests/networking/timestamping/.gitignore b/tools/testing/selftests/networking/timestamping/.gitignore
index d9355035e746..f4f031db8bbf 100644
--- a/tools/testing/selftests/networking/timestamping/.gitignore
+++ b/tools/testing/selftests/networking/timestamping/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 timestamping
 rxtimestamp
 txtimestamp
diff --git a/tools/testing/selftests/nsfs/.gitignore b/tools/testing/selftests/nsfs/.gitignore
index 2ab2c824ce86..ed79ebdf286e 100644
--- a/tools/testing/selftests/nsfs/.gitignore
+++ b/tools/testing/selftests/nsfs/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 owner
 pidns
diff --git a/tools/testing/selftests/openat2/.gitignore b/tools/testing/selftests/openat2/.gitignore
index bd68f6c3fd07..82a4846cbc4b 100644
--- a/tools/testing/selftests/openat2/.gitignore
+++ b/tools/testing/selftests/openat2/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /*_test
diff --git a/tools/testing/selftests/pidfd/.gitignore b/tools/testing/selftests/pidfd/.gitignore
index 39559d723c41..2d4db5afb142 100644
--- a/tools/testing/selftests/pidfd/.gitignore
+++ b/tools/testing/selftests/pidfd/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 pidfd_open_test
 pidfd_poll_test
 pidfd_test
diff --git a/tools/testing/selftests/powerpc/alignment/.gitignore b/tools/testing/selftests/powerpc/alignment/.gitignore
index 6d4fd014511c..28bc6ca13cc6 100644
--- a/tools/testing/selftests/powerpc/alignment/.gitignore
+++ b/tools/testing/selftests/powerpc/alignment/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 copy_first_unaligned
 alignment_handler
diff --git a/tools/testing/selftests/powerpc/benchmarks/.gitignore b/tools/testing/selftests/powerpc/benchmarks/.gitignore
index 9161679b1e1a..c9ce13983c99 100644
--- a/tools/testing/selftests/powerpc/benchmarks/.gitignore
+++ b/tools/testing/selftests/powerpc/benchmarks/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gettimeofday
 context_switch
 fork
diff --git a/tools/testing/selftests/powerpc/cache_shape/.gitignore b/tools/testing/selftests/powerpc/cache_shape/.gitignore
index ec1848434be5..b385eee3012c 100644
--- a/tools/testing/selftests/powerpc/cache_shape/.gitignore
+++ b/tools/testing/selftests/powerpc/cache_shape/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 cache_shape
diff --git a/tools/testing/selftests/powerpc/copyloops/.gitignore b/tools/testing/selftests/powerpc/copyloops/.gitignore
index 12ef5b031974..ddaf140b8255 100644
--- a/tools/testing/selftests/powerpc/copyloops/.gitignore
+++ b/tools/testing/selftests/powerpc/copyloops/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 copyuser_64_t0
 copyuser_64_t1
 copyuser_64_t2
diff --git a/tools/testing/selftests/powerpc/dscr/.gitignore b/tools/testing/selftests/powerpc/dscr/.gitignore
index b585c6c1564a..1d08b15af697 100644
--- a/tools/testing/selftests/powerpc/dscr/.gitignore
+++ b/tools/testing/selftests/powerpc/dscr/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 dscr_default_test
 dscr_explicit_test
 dscr_inherit_exec_test
diff --git a/tools/testing/selftests/powerpc/math/.gitignore b/tools/testing/selftests/powerpc/math/.gitignore
index 50ded63e25b7..e31ca6f453ed 100644
--- a/tools/testing/selftests/powerpc/math/.gitignore
+++ b/tools/testing/selftests/powerpc/math/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 fpu_syscall
 vmx_syscall
 fpu_preempt
diff --git a/tools/testing/selftests/powerpc/mm/.gitignore b/tools/testing/selftests/powerpc/mm/.gitignore
index 0ebeaea22641..7cf7ad261d02 100644
--- a/tools/testing/selftests/powerpc/mm/.gitignore
+++ b/tools/testing/selftests/powerpc/mm/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 hugetlb_vs_thp_test
 subpage_prot
 tempfile
diff --git a/tools/testing/selftests/powerpc/pmu/.gitignore b/tools/testing/selftests/powerpc/pmu/.gitignore
index e748f336eed3..ff7896903d7b 100644
--- a/tools/testing/selftests/powerpc/pmu/.gitignore
+++ b/tools/testing/selftests/powerpc/pmu/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 count_instructions
 l3_bank_test
 per_event_excludes
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/.gitignore b/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
index 42bddbed8b64..2920fb39439b 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
+++ b/tools/testing/selftests/powerpc/pmu/ebb/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 reg_access_test
 event_attributes_test
 cycles_test
diff --git a/tools/testing/selftests/powerpc/primitives/.gitignore b/tools/testing/selftests/powerpc/primitives/.gitignore
index 4cc4e31bed1d..1e5c04e24254 100644
--- a/tools/testing/selftests/powerpc/primitives/.gitignore
+++ b/tools/testing/selftests/powerpc/primitives/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 load_unaligned_zeropad
diff --git a/tools/testing/selftests/powerpc/ptrace/.gitignore b/tools/testing/selftests/powerpc/ptrace/.gitignore
index dce19f221c46..0e96150b7c7e 100644
--- a/tools/testing/selftests/powerpc/ptrace/.gitignore
+++ b/tools/testing/selftests/powerpc/ptrace/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ptrace-gpr
 ptrace-tm-gpr
 ptrace-tm-spd-gpr
diff --git a/tools/testing/selftests/powerpc/security/.gitignore b/tools/testing/selftests/powerpc/security/.gitignore
index 0b969fba3beb..f795e06f5ae3 100644
--- a/tools/testing/selftests/powerpc/security/.gitignore
+++ b/tools/testing/selftests/powerpc/security/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 rfi_flush
diff --git a/tools/testing/selftests/powerpc/signal/.gitignore b/tools/testing/selftests/powerpc/signal/.gitignore
index dca5852a1546..f897b55a44dd 100644
--- a/tools/testing/selftests/powerpc/signal/.gitignore
+++ b/tools/testing/selftests/powerpc/signal/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 signal
 signal_tm
 sigfuz
diff --git a/tools/testing/selftests/powerpc/stringloops/.gitignore b/tools/testing/selftests/powerpc/stringloops/.gitignore
index 31a17e0ba884..b0dfc74aa57e 100644
--- a/tools/testing/selftests/powerpc/stringloops/.gitignore
+++ b/tools/testing/selftests/powerpc/stringloops/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 memcmp_64
 memcmp_32
 strlen
diff --git a/tools/testing/selftests/powerpc/switch_endian/.gitignore b/tools/testing/selftests/powerpc/switch_endian/.gitignore
index 89e762eab676..30e962cf84d1 100644
--- a/tools/testing/selftests/powerpc/switch_endian/.gitignore
+++ b/tools/testing/selftests/powerpc/switch_endian/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 switch_endian_test
 check-reversed.S
diff --git a/tools/testing/selftests/powerpc/syscalls/.gitignore b/tools/testing/selftests/powerpc/syscalls/.gitignore
index f0f3fcc9d802..b00cab225476 100644
--- a/tools/testing/selftests/powerpc/syscalls/.gitignore
+++ b/tools/testing/selftests/powerpc/syscalls/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ipc_unmuxed
diff --git a/tools/testing/selftests/powerpc/tm/.gitignore b/tools/testing/selftests/powerpc/tm/.gitignore
index 98f2708d86cc..7baf2a46002f 100644
--- a/tools/testing/selftests/powerpc/tm/.gitignore
+++ b/tools/testing/selftests/powerpc/tm/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 tm-resched-dscr
 tm-syscall
 tm-signal-msr-resv
diff --git a/tools/testing/selftests/powerpc/vphn/.gitignore b/tools/testing/selftests/powerpc/vphn/.gitignore
index 7c04395010cb..b744aedfd1f2 100644
--- a/tools/testing/selftests/powerpc/vphn/.gitignore
+++ b/tools/testing/selftests/powerpc/vphn/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 test-vphn
diff --git a/tools/testing/selftests/prctl/.gitignore b/tools/testing/selftests/prctl/.gitignore
index 0b5c27447bf6..91af2b631bc9 100644
--- a/tools/testing/selftests/prctl/.gitignore
+++ b/tools/testing/selftests/prctl/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 disable-tsc-ctxt-sw-stress-test
 disable-tsc-on-off-stress-test
 disable-tsc-test
diff --git a/tools/testing/selftests/proc/.gitignore b/tools/testing/selftests/proc/.gitignore
index 66fab4c58ed4..4bca5a9327a4 100644
--- a/tools/testing/selftests/proc/.gitignore
+++ b/tools/testing/selftests/proc/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /fd-001-lookup
 /fd-002-posix-eq
 /fd-003-kthread
diff --git a/tools/testing/selftests/pstore/.gitignore b/tools/testing/selftests/pstore/.gitignore
index 5a4a26e5464b..9938fb406389 100644
--- a/tools/testing/selftests/pstore/.gitignore
+++ b/tools/testing/selftests/pstore/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 logs
 *uuid
diff --git a/tools/testing/selftests/ptp/.gitignore b/tools/testing/selftests/ptp/.gitignore
index f562e49d6917..534ca26eee48 100644
--- a/tools/testing/selftests/ptp/.gitignore
+++ b/tools/testing/selftests/ptp/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 testptp
diff --git a/tools/testing/selftests/ptrace/.gitignore b/tools/testing/selftests/ptrace/.gitignore
index cfcc49a7def7..7bebf9534a86 100644
--- a/tools/testing/selftests/ptrace/.gitignore
+++ b/tools/testing/selftests/ptrace/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 get_syscall_info
 peeksiginfo
diff --git a/tools/testing/selftests/rcutorture/.gitignore b/tools/testing/selftests/rcutorture/.gitignore
index ccc240275d1c..f6cbce77460b 100644
--- a/tools/testing/selftests/rcutorture/.gitignore
+++ b/tools/testing/selftests/rcutorture/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 initrd
 b[0-9]*
 res
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore
index 712a3d41a325..24e27957efcc 100644
--- a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 srcu.c
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore
index 1d016e66980a..57d296341304 100644
--- a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/include/linux/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 srcu.h
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore
index f47cb2045f13..d65462d64816 100644
--- a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore
+++ b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/tests/store_buffering/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.out
diff --git a/tools/testing/selftests/rseq/.gitignore b/tools/testing/selftests/rseq/.gitignore
index cc610da7e369..5910888ebfe1 100644
--- a/tools/testing/selftests/rseq/.gitignore
+++ b/tools/testing/selftests/rseq/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 basic_percpu_ops_test
 basic_test
 basic_rseq_op_test
diff --git a/tools/testing/selftests/rtc/.gitignore b/tools/testing/selftests/rtc/.gitignore
index d0ad44f6294a..fb2d533aa575 100644
--- a/tools/testing/selftests/rtc/.gitignore
+++ b/tools/testing/selftests/rtc/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 rtctest
 setdate
diff --git a/tools/testing/selftests/safesetid/.gitignore b/tools/testing/selftests/safesetid/.gitignore
index 9c1a629bca01..25d3db172907 100644
--- a/tools/testing/selftests/safesetid/.gitignore
+++ b/tools/testing/selftests/safesetid/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 safesetid-test
diff --git a/tools/testing/selftests/seccomp/.gitignore b/tools/testing/selftests/seccomp/.gitignore
index 5af29d3a1b0a..dec678577f9c 100644
--- a/tools/testing/selftests/seccomp/.gitignore
+++ b/tools/testing/selftests/seccomp/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 seccomp_bpf
 seccomp_benchmark
diff --git a/tools/testing/selftests/sigaltstack/.gitignore b/tools/testing/selftests/sigaltstack/.gitignore
index 35897b0a3f44..50a19a8888ce 100644
--- a/tools/testing/selftests/sigaltstack/.gitignore
+++ b/tools/testing/selftests/sigaltstack/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 sas
diff --git a/tools/testing/selftests/size/.gitignore b/tools/testing/selftests/size/.gitignore
index 189b7818de34..923e18eed1a0 100644
--- a/tools/testing/selftests/size/.gitignore
+++ b/tools/testing/selftests/size/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 get_size
diff --git a/tools/testing/selftests/sparc64/drivers/.gitignore b/tools/testing/selftests/sparc64/drivers/.gitignore
index 90e835ed74e6..0331f77373b5 100644
--- a/tools/testing/selftests/sparc64/drivers/.gitignore
+++ b/tools/testing/selftests/sparc64/drivers/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 adi-test
diff --git a/tools/testing/selftests/splice/.gitignore b/tools/testing/selftests/splice/.gitignore
index 1e23fefd68e8..d5a2da428752 100644
--- a/tools/testing/selftests/splice/.gitignore
+++ b/tools/testing/selftests/splice/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 default_file_splice_read
diff --git a/tools/testing/selftests/sync/.gitignore b/tools/testing/selftests/sync/.gitignore
index f5091e7792f2..f1152357712f 100644
--- a/tools/testing/selftests/sync/.gitignore
+++ b/tools/testing/selftests/sync/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 sync_test
diff --git a/tools/testing/selftests/tc-testing/.gitignore b/tools/testing/selftests/tc-testing/.gitignore
index c26d72e0166f..d52f65de23b4 100644
--- a/tools/testing/selftests/tc-testing/.gitignore
+++ b/tools/testing/selftests/tc-testing/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 __pycache__/
 *.pyc
 plugins/
diff --git a/tools/testing/selftests/timens/.gitignore b/tools/testing/selftests/timens/.gitignore
index 789f21e81028..2e43851b47c1 100644
--- a/tools/testing/selftests/timens/.gitignore
+++ b/tools/testing/selftests/timens/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 clock_nanosleep
 exec
 gettime_perf
diff --git a/tools/testing/selftests/timers/.gitignore b/tools/testing/selftests/timers/.gitignore
index 32a9eadb2d4e..bb5326ff900b 100644
--- a/tools/testing/selftests/timers/.gitignore
+++ b/tools/testing/selftests/timers/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 alarmtimer-suspend
 change_skew
 clocksource-switch
diff --git a/tools/testing/selftests/tmpfs/.gitignore b/tools/testing/selftests/tmpfs/.gitignore
index a96838fad74d..b1afaa925905 100644
--- a/tools/testing/selftests/tmpfs/.gitignore
+++ b/tools/testing/selftests/tmpfs/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /bug-link-o-tmpfile
diff --git a/tools/testing/selftests/vDSO/.gitignore b/tools/testing/selftests/vDSO/.gitignore
index 133bf9ee986c..382cfb39a1a3 100644
--- a/tools/testing/selftests/vDSO/.gitignore
+++ b/tools/testing/selftests/vDSO/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 vdso_test
 vdso_standalone_test_x86
diff --git a/tools/testing/selftests/vm/.gitignore b/tools/testing/selftests/vm/.gitignore
index 31b3c98b6d34..876c48d7f41d 100644
--- a/tools/testing/selftests/vm/.gitignore
+++ b/tools/testing/selftests/vm/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 hugepage-mmap
 hugepage-shm
 map_hugetlb
diff --git a/tools/testing/selftests/watchdog/.gitignore b/tools/testing/selftests/watchdog/.gitignore
index 5aac51575c7e..61d7b89cdbca 100644
--- a/tools/testing/selftests/watchdog/.gitignore
+++ b/tools/testing/selftests/watchdog/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 watchdog-test
diff --git a/tools/testing/selftests/wireguard/qemu/.gitignore b/tools/testing/selftests/wireguard/qemu/.gitignore
index 415b542a9d59..bfa15e6feb2f 100644
--- a/tools/testing/selftests/wireguard/qemu/.gitignore
+++ b/tools/testing/selftests/wireguard/qemu/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 build/
 distfiles/
diff --git a/tools/testing/selftests/x86/.gitignore b/tools/testing/selftests/x86/.gitignore
index 7757f73ff9a3..022a1f3b64ef 100644
--- a/tools/testing/selftests/x86/.gitignore
+++ b/tools/testing/selftests/x86/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *_32
 *_64
 single_step_syscall
diff --git a/tools/testing/vsock/.gitignore b/tools/testing/vsock/.gitignore
index 7f7a2ccc30c4..87ca2731cff9 100644
--- a/tools/testing/vsock/.gitignore
+++ b/tools/testing/vsock/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.d
 vsock_test
 vsock_diag_test
diff --git a/tools/thermal/tmon/.gitignore b/tools/thermal/tmon/.gitignore
index 06e96be65276..d9e97a0308f5 100644
--- a/tools/thermal/tmon/.gitignore
+++ b/tools/thermal/tmon/.gitignore
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 /tmon
diff --git a/tools/usb/.gitignore b/tools/usb/.gitignore
index 1b7448981435..fce1ef5a9267 100644
--- a/tools/usb/.gitignore
+++ b/tools/usb/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 ffs-test
 testusb
diff --git a/tools/usb/usbip/.gitignore b/tools/usb/usbip/.gitignore
index 03b892c8bd8c..597361a96dbb 100644
--- a/tools/usb/usbip/.gitignore
+++ b/tools/usb/usbip/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 Makefile
 Makefile.in
 aclocal.m4
diff --git a/tools/virtio/.gitignore b/tools/virtio/.gitignore
index 1cfbb0157a46..075588c4da08 100644
--- a/tools/virtio/.gitignore
+++ b/tools/virtio/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *.d
 virtio_test
 vringh_test
diff --git a/tools/vm/.gitignore b/tools/vm/.gitignore
index 44f095fa2604..79bb92ae1bb3 100644
--- a/tools/vm/.gitignore
+++ b/tools/vm/.gitignore
@@ -1,2 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
 slabinfo
 page-types
diff --git a/usr/.gitignore b/usr/.gitignore
index 610de736b75e..935442ed1eb2 100644
--- a/usr/.gitignore
+++ b/usr/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 gen_init_cpio
 initramfs_data.cpio
 /initramfs_inc_data
diff --git a/usr/include/.gitignore b/usr/include/.gitignore
index a0991ff4402b..d2fab782cb7d 100644
--- a/usr/include/.gitignore
+++ b/usr/include/.gitignore
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 *
 !.gitignore
 !Makefile
-- 
cgit v1.2.3


From 5cdbec108fd21a605e0c6e96e7faddd01e78047d Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Sat, 7 Mar 2020 18:59:05 -0800
Subject: parse-maintainers: Do not sort section content by default

Add an --order switch to control section reordering.
Default for --order is off.

Change the default ordering to a slightly more sensible:

M:  Person acting as a maintainer
R:  Person acting as a patch reviewer
L:  Mailing list where patches should be sent
S:  Maintenance status
W:  URI for general information
Q:  URI for patchwork tracking
B:  URI for bug tracking/submission
C:  URI for chat
P:  URI or file for subsystem specific coding styles
T:  SCM tree type and location
F:  File and directory pattern
X:  File and directory exclusion pattern
N:  File glob
K:  Keyword - patch content regex

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/parse-maintainers.pl | 31 +++++++++++++++++++++++++++----
 1 file changed, 27 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/parse-maintainers.pl b/scripts/parse-maintainers.pl
index 255cef1b098d..2ca4eb3f190d 100755
--- a/scripts/parse-maintainers.pl
+++ b/scripts/parse-maintainers.pl
@@ -8,13 +8,14 @@ my $input_file = "MAINTAINERS";
 my $output_file = "MAINTAINERS.new";
 my $output_section = "SECTION.new";
 my $help = 0;
-
+my $order = 0;
 my $P = $0;
 
 if (!GetOptions(
 		'input=s' => \$input_file,
 		'output=s' => \$output_file,
 		'section=s' => \$output_section,
+		'order!' => \$order,
 		'h|help|usage' => \$help,
 	    )) {
     die "$P: invalid argument - use --help if necessary\n";
@@ -32,6 +33,22 @@ usage: $P [options] <pattern matching regexes>
   --input => MAINTAINERS file to read (default: MAINTAINERS)
   --output => sorted MAINTAINERS file to write (default: MAINTAINERS.new)
   --section => new sorted MAINTAINERS file to write to (default: SECTION.new)
+  --order => Use the preferred section content output ordering (default: 0)
+    Preferred ordering of section output is:
+      M:  Person acting as a maintainer
+      R:  Person acting as a patch reviewer
+      L:  Mailing list where patches should be sent
+      S:  Maintenance status
+      W:  URI for general information
+      Q:  URI for patchwork tracking
+      B:  URI for bug tracking/submission
+      C:  URI for chat
+      P:  URI or file for subsystem specific coding styles
+      T:  SCM tree type and location
+      F:  File and directory pattern
+      X:  File and directory exclusion pattern
+      N:  File glob
+      K:  Keyword - patch content regex
 
 If <pattern match regexes> exist, then the sections that match the
 regexes are not written to the output file but are written to the
@@ -56,7 +73,7 @@ sub by_category($$) {
 
 sub by_pattern($$) {
     my ($a, $b) = @_;
-    my $preferred_order = 'MRPLSWTQBCFXNK';
+    my $preferred_order = 'MRLSWQBCPTFXNK';
 
     my $a1 = uc(substr($a, 0, 1));
     my $b1 = uc(substr($b, 0, 1));
@@ -105,8 +122,14 @@ sub alpha_output {
 		print $file $separator;
 	    }
 	    print $file $key . "\n";
-	    foreach my $pattern (sort by_pattern split('\n', %$hashref{$key})) {
-		print $file ($pattern . "\n");
+	    if ($order) {
+		foreach my $pattern (sort by_pattern split('\n', %$hashref{$key})) {
+		    print $file ($pattern . "\n");
+		}
+	    } else {
+		foreach my $pattern (split('\n', %$hashref{$key})) {
+		    print $file ($pattern . "\n");
+		}
 	    }
 	}
     }
-- 
cgit v1.2.3


From e33a814e772cdc36436c8c188d8c42d019fda639 Mon Sep 17 00:00:00 2001
From: Dirk Mueller <dmueller@suse.com>
Date: Tue, 14 Jan 2020 18:53:41 +0100
Subject: scripts/dtc: Remove redundant YYLOC global declaration

gcc 10 will default to -fno-common, which causes this error at link
time:

  (.text+0x0): multiple definition of `yylloc'; dtc-lexer.lex.o (symbol from plugin):(.text+0x0): first defined here

This is because both dtc-lexer as well as dtc-parser define the same
global symbol yyloc. Before with -fcommon those were merged into one
defintion. The proper solution would be to to mark this as "extern",
however that leads to:

  dtc-lexer.l:26:16: error: redundant redeclaration of 'yylloc' [-Werror=redundant-decls]
   26 | extern YYLTYPE yylloc;
      |                ^~~~~~
In file included from dtc-lexer.l:24:
dtc-parser.tab.h:127:16: note: previous declaration of 'yylloc' was here
  127 | extern YYLTYPE yylloc;
      |                ^~~~~~
cc1: all warnings being treated as errors

which means the declaration is completely redundant and can just be
dropped.

Signed-off-by: Dirk Mueller <dmueller@suse.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[robh: cherry-pick from upstream]
Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 scripts/dtc/dtc-lexer.l | 1 -
 1 file changed, 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/dtc/dtc-lexer.l b/scripts/dtc/dtc-lexer.l
index 5c6c3fd557d7..b3b7270300de 100644
--- a/scripts/dtc/dtc-lexer.l
+++ b/scripts/dtc/dtc-lexer.l
@@ -23,7 +23,6 @@ LINECOMMENT	"//".*\n
 #include "srcpos.h"
 #include "dtc-parser.tab.h"
 
-YYLTYPE yylloc;
 extern bool treesource_error;
 
 /* CAUTION: this will stop working if we ever use yyless() or yyunput() */
-- 
cgit v1.2.3


From dbd35860122b91a34b79162d1d1bed98b15c7e91 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 25 Mar 2020 12:14:31 +0900
Subject: kconfig: remove unused variable in qconf.cc
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

If this file were compiled with -Wall, the following warning would be
reported:

scripts/kconfig/qconf.cc:312:6: warning: unused variable ‘i’ [-Wunused-variable]
  int i;
      ^

The commit prepares to turn on -Wall for C++ host programs.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
---
 scripts/kconfig/qconf.cc | 2 --
 1 file changed, 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 82773cc35d35..50a5245d87bb 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -309,8 +309,6 @@ ConfigList::ConfigList(ConfigView* p, const char *name)
 	  showName(false), showRange(false), showData(false), mode(singleMode), optMode(normalOpt),
 	  rootEntry(0), headerPopup(0)
 {
-	int i;
-
 	setObjectName(name);
 	setSortingEnabled(false);
 	setRootIsDecorated(true);
-- 
cgit v1.2.3


From 735aab1e008b6d9ba8057caa647b6619bf73460f Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 25 Mar 2020 12:14:32 +0900
Subject: kbuild: add -Wall to KBUILD_HOSTCXXFLAGS

Add -Wall to catch more warnings for C++ host programs.

When I submitted the previous version, the 0-day bot reported
-Wc++11-compat warnings for old GCC:

  HOSTCXX -fPIC scripts/gcc-plugins/latent_entropy_plugin.o
In file included from /usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/tm.h:28:0,
                 from scripts/gcc-plugins/gcc-common.h:15,
                 from scripts/gcc-plugins/latent_entropy_plugin.c:78:
/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/config/elfos.h:102:21: warning: C++11 requires a space between string literal and macro [-Wc++11-compat]
    fprintf ((FILE), "%s"HOST_WIDE_INT_PRINT_UNSIGNED"\n",\
                     ^
/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/config/elfos.h:170:24: warning: C++11 requires a space between string literal and macro [-Wc++11-compat]
       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",  \
                        ^
In file included from /usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/tm.h:42:0,
                 from scripts/gcc-plugins/gcc-common.h:15,
                 from scripts/gcc-plugins/latent_entropy_plugin.c:78:
/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/defaults.h:126:24: warning: C++11 requires a space between string literal and macro [-Wc++11-compat]
       fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",  \
                        ^

The source of the warnings is in the plugin headers, so we have no
control of it. I just suppressed them by adding -Wno-c++11-compat to
scripts/gcc-plugins/Makefile.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
---
 Makefile                     | 2 +-
 scripts/gcc-plugins/Makefile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index d32e8c86f09c..4697d7ce15f2 100644
--- a/Makefile
+++ b/Makefile
@@ -403,7 +403,7 @@ HOSTCXX      = g++
 KBUILD_HOSTCFLAGS   := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
 		-fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \
 		$(HOSTCFLAGS)
-KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
+KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
 KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
 KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
 
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index f2ee8bd7abc6..efff00959a9c 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -10,7 +10,7 @@ else
   HOSTLIBS := hostcxxlibs
   HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
   HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
-  HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable
+  HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat
   export HOST_EXTRACXXFLAGS
 endif
 
-- 
cgit v1.2.3


From d9dac147a2c370c188ef6251c7c6f42759f65eb0 Mon Sep 17 00:00:00 2001
From: Reinhard Karcher <reinhard.karcher@gmx.net>
Date: Tue, 24 Mar 2020 11:24:47 +0100
Subject: kbuild: deb-pkg: fix warning when CONFIG_DEBUG_INFO is unset

Creating a Debian package without CONFIG_DEBUG_INFO produces
a warning that no debug package was created.

This patch excludes the debug package from the control file,
if no debug package is created by this configuration.

Signed-off-by: Reinhard Karcher <reinhard.karcher@gmx.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/package/mkdebian | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'scripts')

diff --git a/scripts/package/mkdebian b/scripts/package/mkdebian
index 357dc56bcf30..df1adbfb8ead 100755
--- a/scripts/package/mkdebian
+++ b/scripts/package/mkdebian
@@ -198,6 +198,10 @@ Description: Linux support headers for userspace development
  This package provides userspaces headers from the Linux kernel.  These headers
  are used by the installed headers for GNU glibc and other system libraries.
 Multi-Arch: same
+EOF
+
+if is_enabled CONFIG_DEBUG_INFO; then
+cat <<EOF >> debian/control
 
 Package: $dbg_packagename
 Section: debug
@@ -206,6 +210,7 @@ Description: Linux kernel debugging symbols for $version
  This package will come in handy if you need to debug the kernel. It provides
  all the necessary debug symbols for the kernel and its modules.
 EOF
+fi
 
 cat <<EOF > debian/rules
 #!$(command -v $MAKE) -f
-- 
cgit v1.2.3


From 66906c4933d65ed88f986fbcdcb361998d0a8ba9 Mon Sep 17 00:00:00 2001
From: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Date: Wed, 1 Apr 2020 21:03:15 -0700
Subject: scripts/spelling.txt: add syfs/sysfs pattern
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

There are a few cases in the tree where "sysfs" is misspelled as "syfs".

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.ne>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Xiong <xndchn@gmail.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Chris Paterson <chris.paterson2@renesas.com>
Cc: Luca Ceresoli <luca@lucaceresoli.net>
Link: http://lkml.kernel.org/r/20200218152010.27349-1-j.neuschaefer@gmx.net
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/spelling.txt | 1 +
 1 file changed, 1 insertion(+)

(limited to 'scripts')

diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index ffa838f3a2b5..6d5243904e76 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -1328,6 +1328,7 @@ swithcing||switching
 swithed||switched
 swithing||switching
 swtich||switch
+syfs||sysfs
 symetric||symmetric
 synax||syntax
 synchonized||synchronized
-- 
cgit v1.2.3


From df47b5e9a40367fb6274a0eaf325e26829b01b9b Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 1 Apr 2020 21:03:18 -0700
Subject: scripts/spelling.txt: add more spellings to spelling.txt

Here are some of the more common spelling mistakes and typos that I've
found while fixing up spelling mistakes in the kernel since November 2019

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200313174946.228216-1-colin.king@canonical.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/spelling.txt | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index 6d5243904e76..d9cd24cf0d40 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -177,7 +177,9 @@ atomatically||automatically
 atomicly||atomically
 atempt||attempt
 attachement||attachment
+attatch||attach
 attched||attached
+attemp||attempt
 attemps||attempts
 attemping||attempting
 attepmpt||attempt
@@ -235,11 +237,13 @@ brievely||briefly
 brigde||bridge
 broadcase||broadcast
 broadcat||broadcast
+bufer||buffer
 bufufer||buffer
 cacluated||calculated
 caculate||calculate
 caculation||calculation
 cadidate||candidate
+cahces||caches
 calender||calendar
 calescing||coalescing
 calle||called
@@ -338,7 +342,6 @@ conditon||condition
 condtion||condition
 conected||connected
 conector||connector
-connecetd||connected
 configration||configuration
 configuartion||configuration
 configuation||configuration
@@ -349,7 +352,9 @@ configuretion||configuration
 configutation||configuration
 conider||consider
 conjuction||conjunction
+connecetd||connected
 connectinos||connections
+connetor||connector
 connnection||connection
 connnections||connections
 consistancy||consistency
@@ -469,6 +474,7 @@ difinition||definition
 digial||digital
 dimention||dimension
 dimesions||dimensions
+disgest||digest
 dispalying||displaying
 diplay||display
 directon||direction
@@ -553,6 +559,7 @@ etsablishment||establishment
 etsbalishment||establishment
 excecutable||executable
 exceded||exceeded
+exceeed||exceed
 excellant||excellent
 execeeded||exceeded
 execeeds||exceeds
@@ -742,6 +749,7 @@ initialzing||initializing
 initilization||initialization
 initilize||initialize
 initliaze||initialize
+initilized||initialized
 inofficial||unofficial
 inrerface||interface
 insititute||institute
@@ -802,6 +810,7 @@ irrelevent||irrelevant
 isnt||isn't
 isssue||issue
 issus||issues
+iteraions||iterations
 iternations||iterations
 itertation||iteration
 itslef||itself
@@ -828,6 +837,7 @@ libary||library
 librairies||libraries
 libraris||libraries
 licenceing||licencing
+limted||limited
 logaritmic||logarithmic
 loggging||logging
 loggin||login
@@ -924,6 +934,7 @@ nerver||never
 nescessary||necessary
 nessessary||necessary
 noticable||noticeable
+notication||notification
 notications||notifications
 notifcations||notifications
 notifed||notified
@@ -1007,6 +1018,7 @@ pendantic||pedantic
 peprocessor||preprocessor
 perfoming||performing
 perfomring||performing
+periperal||peripheral
 peripherial||peripheral
 permissons||permissions
 peroid||period
@@ -1043,6 +1055,7 @@ prefferably||preferably
 premption||preemption
 prepaired||prepared
 preperation||preparation
+preprare||prepare
 pressre||pressure
 primative||primitive
 princliple||principle
@@ -1064,6 +1077,7 @@ processsed||processed
 processsing||processing
 procteted||protected
 prodecure||procedure
+progamming||programming
 progams||programs
 progess||progress
 programers||programmers
@@ -1151,12 +1165,14 @@ replys||replies
 reponse||response
 representaion||representation
 reqeust||request
+reqister||register
 requestied||requested
 requiere||require
 requirment||requirement
 requred||required
 requried||required
 requst||request
+requsted||requested
 reregisteration||reregistration
 reseting||resetting
 reseved||reserved
@@ -1227,10 +1243,12 @@ seqeuncer||sequencer
 seqeuencer||sequencer
 sequece||sequence
 sequencial||sequential
+serivce||service
 serveral||several
 servive||service
 setts||sets
 settting||setting
+shapshot||snapshot
 shotdown||shutdown
 shoud||should
 shouldnt||shouldn't
-- 
cgit v1.2.3


From dfa05c28ca7ffc0a94e7a35b91014d088c1a1ff5 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Mon, 6 Apr 2020 20:10:48 -0700
Subject: checkpatch: remove email address comment from email address
 comparisons

About 2% of the last 100K commits have email addresses that include an
RFC2822 compliant comment like:

	Peter Zijlstra (Intel) <peterz@infradead.org>

checkpatch currently does a comparison of the complete name and address to
the submitted author to determine if the author has signed-off and emits a
warning if the exact email names and addresses do not match.

Unfortunately, the author email address can be written without the comment
like:

	Peter Zijlstra <peterz@infradead.org>

Add logic to compare the comment stripped email addresses to avoid this
warning.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ebaa2f7c8f94e25520981945cddcc1982e70e072.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 39 +++++++++++++++++++++++++++++----------
 1 file changed, 29 insertions(+), 10 deletions(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a63380c6b0d2..3f62971c7c98 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -1118,6 +1118,7 @@ sub parse_email {
 	my ($formatted_email) = @_;
 
 	my $name = "";
+	my $name_comment = "";
 	my $address = "";
 	my $comment = "";
 
@@ -1150,6 +1151,10 @@ sub parse_email {
 
 	$name = trim($name);
 	$name =~ s/^\"|\"$//g;
+	$name =~ s/(\s*\([^\)]+\))\s*//;
+	if (defined($1)) {
+		$name_comment = trim($1);
+	}
 	$address = trim($address);
 	$address =~ s/^\<|\>$//g;
 
@@ -1158,7 +1163,7 @@ sub parse_email {
 		$name = "\"$name\"";
 	}
 
-	return ($name, $address, $comment);
+	return ($name, $name_comment, $address, $comment);
 }
 
 sub format_email {
@@ -1184,6 +1189,23 @@ sub format_email {
 	return $formatted_email;
 }
 
+sub reformat_email {
+	my ($email) = @_;
+
+	my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
+	return format_email($email_name, $email_address);
+}
+
+sub same_email_addresses {
+	my ($email1, $email2) = @_;
+
+	my ($email1_name, $name1_comment, $email1_address, $comment1) = parse_email($email1);
+	my ($email2_name, $name2_comment, $email2_address, $comment2) = parse_email($email2);
+
+	return $email1_name eq $email2_name &&
+	       $email1_address eq $email2_address;
+}
+
 sub which {
 	my ($bin) = @_;
 
@@ -2604,17 +2626,16 @@ sub process {
 			$author = $1;
 			$author = encode("utf8", $author) if ($line =~ /=\?utf-8\?/i);
 			$author =~ s/"//g;
+			$author = reformat_email($author);
 		}
 
 # Check the patch for a signoff:
-		if ($line =~ /^\s*signed-off-by:/i) {
+		if ($line =~ /^\s*signed-off-by:\s*(.*)/i) {
 			$signoff++;
 			$in_commit_log = 0;
 			if ($author ne '') {
-				my $l = $line;
-				$l =~ s/"//g;
-				if ($l =~ /^\s*signed-off-by:\s*\Q$author\E/i) {
-				    $authorsignoff = 1;
+				if (same_email_addresses($1, $author)) {
+					$authorsignoff = 1;
 				}
 			}
 		}
@@ -2664,7 +2685,7 @@ sub process {
 				}
 			}
 
-			my ($email_name, $email_address, $comment) = parse_email($email);
+			my ($email_name, $name_comment, $email_address, $comment) = parse_email($email);
 			my $suggested_email = format_email(($email_name, $email_address));
 			if ($suggested_email eq "") {
 				ERROR("BAD_SIGN_OFF",
@@ -2675,9 +2696,7 @@ sub process {
 				$dequoted =~ s/" </ </;
 				# Don't force email to have quotes
 				# Allow just an angle bracketed address
-				if ("$dequoted$comment" ne $email &&
-				    "<$email_address>$comment" ne $email &&
-				    "$suggested_email$comment" ne $email) {
+				if (!same_email_addresses($email, $suggested_email)) {
 					WARN("BAD_SIGN_OFF",
 					     "email address '$email' might be better as '$suggested_email$comment'\n" . $herecurr);
 				}
-- 
cgit v1.2.3


From c8df0ab61454aa1c84e97af3673ee8db44e39f05 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Mon, 6 Apr 2020 20:10:51 -0700
Subject: checkpatch: check SPDX tags in YAML files

This adds a warning when a YAML file is lacking a SPDX header on first
line, or it uses incorrect commenting style.

Currently the only YAML files in the tree are Devicetree binding
documents.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Rob Herring <robh@kernel.org>
Link: http://lkml.kernel.org/r/20200129123356.388669-1-lkundrak@v3.sk
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 3f62971c7c98..977d4c0c2dc9 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3106,7 +3106,7 @@ sub process {
 					$comment = '/*';
 				} elsif ($realfile =~ /\.(c|dts|dtsi)$/) {
 					$comment = '//';
-				} elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc)$/) {
+				} elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc|yaml)$/) {
 					$comment = '#';
 				} elsif ($realfile =~ /\.rst$/) {
 					$comment = '..';
-- 
cgit v1.2.3


From a8972573eb5c784a9c199fedbfdfb694e0ca4233 Mon Sep 17 00:00:00 2001
From: John Hubbard <jhubbard@nvidia.com>
Date: Mon, 6 Apr 2020 20:10:55 -0700
Subject: checkpatch: support "base-commit:" format

In order to support the get-lore-mbox.py tool described in [1], I ran:

    git format-patch --base=<commit> --cover-letter <revrange>

...  which generated a "base-commit: <commit-hash>" tag at the end of the
cover letter.  However, checkpatch.pl generated an error upon encounting
"base-commit:" in the cover letter:

    "ERROR: Please use git commit description style..."

...  because it found the "commit" keyword, and failed to recognize that
it was part of the "base-commit" phrase, and as such, should not be
subjected to the same commit description style rules.

Update checkpatch.pl to include a special case for "base-commit:" (at the
start of the line, possibly with some leading whitespace) so that that tag
no longer generates a checkpatch error.

[1] https://lwn.net/Articles/811528/ "Better tools for kernel
    developers"

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: http://lkml.kernel.org/r/20200213055004.69235-2-jhubbard@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 977d4c0c2dc9..ede55afaadf0 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2780,7 +2780,7 @@ sub process {
 
 # Check for git id commit length and improperly formed commit descriptions
 		if ($in_commit_log && !$commit_log_possible_stack_dump &&
-		    $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink):/i &&
+		    $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink|base-commit):/i &&
 		    $line !~ /^This reverts commit [0-9a-f]{7,40}/ &&
 		    ($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i ||
 		     ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i &&
-- 
cgit v1.2.3


From f36d3eb89a43047d3eba222a8132585da25cebfd Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Mon, 6 Apr 2020 20:10:58 -0700
Subject: checkpatch: prefer fallthrough; over fallthrough comments

commit 294f69e662d1 ("compiler_attributes.h: Add 'fallthrough' pseudo
keyword for switch/case use") added the pseudo keyword so add a test for
it to checkpatch.

Warn on a patch or use --strict for files.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/8b6c1b9031ab9f3cdebada06b8d46467f1492d68.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index ede55afaadf0..2b32816f5c2e 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2294,6 +2294,19 @@ sub pos_last_openparen {
 	return length(expand_tabs(substr($line, 0, $last_openparen))) + 1;
 }
 
+sub get_raw_comment {
+	my ($line, $rawline) = @_;
+	my $comment = '';
+
+	for my $i (0 .. (length($line) - 1)) {
+		if (substr($line, $i, 1) eq "$;") {
+			$comment .= substr($rawline, $i, 1);
+		}
+	}
+
+	return $comment;
+}
+
 sub process {
 	my $filename = shift;
 
@@ -2455,6 +2468,7 @@ sub process {
 		$sline =~ s/$;/ /g;	#with comments as spaces
 
 		my $rawline = $rawlines[$linenr - 1];
+		my $raw_comment = get_raw_comment($line, $rawline);
 
 # check if it's a mode change, rename or start of a patch
 		if (!$in_commit_log &&
@@ -6408,6 +6422,28 @@ sub process {
 			}
 		}
 
+# check for /* fallthrough */ like comment, prefer fallthrough;
+		my @fallthroughs = (
+			'fallthrough',
+			'@fallthrough@',
+			'lint -fallthrough[ \t]*',
+			'intentional(?:ly)?[ \t]*fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)',
+			'(?:else,?\s*)?FALL(?:S | |-)?THR(?:OUGH|U|EW)[ \t.!]*(?:-[^\n\r]*)?',
+			'Fall(?:(?:s | |-)[Tt]|t)hr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
+			'fall(?:s | |-)?thr(?:ough|u|ew)[ \t.!]*(?:-[^\n\r]*)?',
+		    );
+		if ($raw_comment ne '') {
+			foreach my $ft (@fallthroughs) {
+				if ($raw_comment =~ /$ft/) {
+					my $msg_level = \&WARN;
+					$msg_level = \&CHK if ($file);
+					&{$msg_level}("PREFER_FALLTHROUGH",
+						      "Prefer 'fallthrough;' over fallthrough comment\n" . $herecurr);
+					last;
+				}
+			}
+		}
+
 # check for switch/default statements without a break;
 		if ($perl_version_ok &&
 		    defined $stat &&
-- 
cgit v1.2.3


From 342d3d2f136837cbe9aaee368dbea39865b9c0f4 Mon Sep 17 00:00:00 2001
From: Antonio Borneo <borneo.antonio@gmail.com>
Date: Mon, 6 Apr 2020 20:11:01 -0700
Subject: checkpatch: fix minor typo and mixed space+tab in indentation

Fix spelling of "concatenation".
Don't use tab after space in indentation.

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200122163852.124417-2-borneo.antonio@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 2b32816f5c2e..879ccf33b441 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4615,7 +4615,7 @@ sub process {
 					    ($op eq '>' &&
 					     $ca =~ /<\S+\@\S+$/))
 					{
-					    	$ok = 1;
+						$ok = 1;
 					}
 
 					# for asm volatile statements
@@ -4950,7 +4950,7 @@ sub process {
 			# conditional.
 			substr($s, 0, length($c), '');
 			$s =~ s/\n.*//g;
-			$s =~ s/$;//g; 	# Remove any comments
+			$s =~ s/$;//g;	# Remove any comments
 			if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ &&
 			    $c !~ /}\s*while\s*/)
 			{
@@ -4989,7 +4989,7 @@ sub process {
 # if and else should not have general statements after it
 		if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) {
 			my $s = $1;
-			$s =~ s/$;//g; 	# Remove any comments
+			$s =~ s/$;//g;	# Remove any comments
 			if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) {
 				ERROR("TRAILING_STATEMENTS",
 				      "trailing statements should be on next line\n" . $herecurr);
@@ -5165,7 +5165,7 @@ sub process {
 			{
 			}
 
-			# Flatten any obvious string concatentation.
+			# Flatten any obvious string concatenation.
 			while ($dstat =~ s/($String)\s*$Ident/$1/ ||
 			       $dstat =~ s/$Ident\s*($String)/$1/)
 			{
-- 
cgit v1.2.3


From 7b18496cbc9af07f5dfbb1ce56ea839344061b54 Mon Sep 17 00:00:00 2001
From: Antonio Borneo <borneo.antonio@gmail.com>
Date: Mon, 6 Apr 2020 20:11:04 -0700
Subject: checkpatch: fix multiple const * types

Commit 1574a29f8e76 ("checkpatch: allow multiple const * types") claims to
support repetition of pattern "const *", but it actually allows only one
extra instance.

Check the following lines
	int a(char const * const x[]);
	int b(char const * const *x);
	int c(char const * const * const x[]);
	int d(char const * const * const *x);

with command

	./scripts/checkpatch.pl --show-types -f filename

to find that only the first line passes the test, while a warning
is triggered by the other 3 lines:

	WARNING:FUNCTION_ARGUMENTS: function definition argument
	'char const * const' should also have an identifier name

The reason is that the pattern match halts at the second asterisk in the
line, thus the remaining text starting with asterisk fails to match a
valid name for a variable.

Fixed by replacing "?" (Match 1 or 0 times) with "{0,4}" (Match no more
than 4 times) in the regular expression.  Fix also the similar test for
types in unusual order.

Fixes: 1574a29f8e76 ("checkpatch: allow multiple const * types")
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200122163852.124417-1-borneo.antonio@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 879ccf33b441..0d2b95036ea5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -804,12 +804,12 @@ sub build_types {
 		  }x;
 	$Type	= qr{
 			$NonptrType
-			(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)?
+			(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+){0,4}
 			(?:\s+$Inline|\s+$Modifier)*
 		  }x;
 	$TypeMisordered	= qr{
 			$NonptrTypeMisordered
-			(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)?
+			(?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+){0,4}
 			(?:\s+$Inline|\s+$Modifier)*
 		  }x;
 	$Declare	= qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type};
-- 
cgit v1.2.3


From 713a09de9ca9ac6277cb43d79967e7852238f998 Mon Sep 17 00:00:00 2001
From: Antonio Borneo <borneo.antonio@gmail.com>
Date: Mon, 6 Apr 2020 20:11:07 -0700
Subject: checkpatch: add command-line option for TAB size
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Linux kernel coding style requires a size of 8 characters for both TAB and
indentation, and such value is embedded as magic value allover the
checkpatch script.

This makes hard to reuse the script by other projects with different
requirements in their coding style (e.g.  OpenOCD [1] requires TAB size of
4 characters [2]).

Replace the magic value 8 with a variable.

Add a command-line option "--tab-size" to let the user select a
TAB size value other than 8.

[1] http://openocd.org/
[2] http://openocd.org/doc/doxygen/html/stylec.html#styleformat

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Erik Ahlén <erik.ahlen@avalonenterprise.com>
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200122163852.124417-3-borneo.antonio@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 0d2b95036ea5..fd16f2239a00 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -64,6 +64,7 @@ my $color = "auto";
 my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE
 # git output parsing needs US English output, so first set backtick child process LANGUAGE
 my $git_command ='export LANGUAGE=en_US.UTF-8; git';
+my $tabsize = 8;
 
 sub help {
 	my ($exitcode) = @_;
@@ -98,6 +99,7 @@ Options:
   --show-types               show the specific message type in the output
   --max-line-length=n        set the maximum line length, if exceeded, warn
   --min-conf-desc-length=n   set the min description length, if shorter, warn
+  --tab-size=n               set the number of spaces for tab (default 8)
   --root=PATH                PATH to the kernel tree root
   --no-summary               suppress the per-file summary
   --mailback                 only produce a report in case of warnings/errors
@@ -215,6 +217,7 @@ GetOptions(
 	'list-types!'	=> \$list_types,
 	'max-line-length=i' => \$max_line_length,
 	'min-conf-desc-length=i' => \$min_conf_desc_length,
+	'tab-size=i'	=> \$tabsize,
 	'root=s'	=> \$root,
 	'summary!'	=> \$summary,
 	'mailback!'	=> \$mailback,
@@ -267,6 +270,9 @@ if ($color =~ /^[01]$/) {
 	die "Invalid color mode: $color\n";
 }
 
+# skip TAB size 1 to avoid additional checks on $tabsize - 1
+die "Invalid TAB size: $tabsize\n" if ($tabsize < 2);
+
 sub hash_save_array_words {
 	my ($hashRef, $arrayRef) = @_;
 
@@ -1239,7 +1245,7 @@ sub expand_tabs {
 		if ($c eq "\t") {
 			$res .= ' ';
 			$n++;
-			for (; ($n % 8) != 0; $n++) {
+			for (; ($n % $tabsize) != 0; $n++) {
 				$res .= ' ';
 			}
 			next;
@@ -2252,7 +2258,7 @@ sub string_find_replace {
 sub tabify {
 	my ($leading) = @_;
 
-	my $source_indent = 8;
+	my $source_indent = $tabsize;
 	my $max_spaces_before_tab = $source_indent - 1;
 	my $spaces_to_tab = " " x $source_indent;
 
@@ -3231,7 +3237,7 @@ sub process {
 		next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/);
 
 # at the beginning of a line any tabs must come first and anything
-# more than 8 must use tabs.
+# more than $tabsize must use tabs.
 		if ($rawline =~ /^\+\s* \t\s*\S/ ||
 		    $rawline =~ /^\+\s*        \s*/) {
 			my $herevet = "$here\n" . cat_vet($rawline) . "\n";
@@ -3250,7 +3256,7 @@ sub process {
 				"please, no space before tabs\n" . $herevet) &&
 			    $fix) {
 				while ($fixed[$fixlinenr] =~
-					   s/(^\+.*) {8,8}\t/$1\t\t/) {}
+					   s/(^\+.*) {$tabsize,$tabsize}\t/$1\t\t/) {}
 				while ($fixed[$fixlinenr] =~
 					   s/(^\+.*) +\t/$1\t/) {}
 			}
@@ -3272,11 +3278,11 @@ sub process {
 		if ($perl_version_ok &&
 		    $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) {
 			my $indent = length($1);
-			if ($indent % 8) {
+			if ($indent % $tabsize) {
 				if (WARN("TABSTOP",
 					 "Statements should start on a tabstop\n" . $herecurr) &&
 				    $fix) {
-					$fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/8)@e;
+					$fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/$tabsize)@e;
 				}
 			}
 		}
@@ -3294,8 +3300,8 @@ sub process {
 				my $newindent = $2;
 
 				my $goodtabindent = $oldindent .
-					"\t" x ($pos / 8) .
-					" "  x ($pos % 8);
+					"\t" x ($pos / $tabsize) .
+					" "  x ($pos % $tabsize);
 				my $goodspaceindent = $oldindent . " "  x $pos;
 
 				if ($newindent ne $goodtabindent &&
@@ -3766,11 +3772,11 @@ sub process {
 			#print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n";
 
 			if ($check && $s ne '' &&
-			    (($sindent % 8) != 0 ||
+			    (($sindent % $tabsize) != 0 ||
 			     ($sindent < $indent) ||
 			     ($sindent == $indent &&
 			      ($s !~ /^\s*(?:\}|\{|else\b)/)) ||
-			     ($sindent > $indent + 8))) {
+			     ($sindent > $indent + $tabsize))) {
 				WARN("SUSPECT_CODE_INDENT",
 				     "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n");
 			}
-- 
cgit v1.2.3


From 44d303eb05ef1a24fec96580aa8a8d6f555e9b7e Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Mon, 6 Apr 2020 20:11:10 -0700
Subject: checkpatch: improve Gerrit Change-Id: test

The Gerrit Change-Id: entry is sometimes placed after a Signed-off-by:
line.  When this occurs, the Gerrit warning is not currently emitted as
the first Signed-off-by: signature sets a flag to stop looking.

Change the test to add a test for the --- patch separator and emit the
warning before any before the --- and also before any diff file name.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/2f6d5f8766fe7439a116c77ea8cc721a3f2d77a2.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index fd16f2239a00..64cfd617eefc 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2335,6 +2335,7 @@ sub process {
 	my $is_binding_patch = -1;
 	my $in_header_lines = $file ? 0 : 1;
 	my $in_commit_log = 0;		#Scanning lines before patch
+	my $has_patch_separator = 0;	#Found a --- line
 	my $has_commit_log = 0;		#Encountered lines before patch
 	my $commit_log_lines = 0;	#Number of commit log lines
 	my $commit_log_possible_stack_dump = 0;
@@ -2660,6 +2661,12 @@ sub process {
 			}
 		}
 
+# Check for patch separator
+		if ($line =~ /^---$/) {
+			$has_patch_separator = 1;
+			$in_commit_log = 0;
+		}
+
 # Check if MAINTAINERS is being updated.  If so, there's probably no need to
 # emit the "does MAINTAINERS need updating?" message on file add/move/delete
 		if ($line =~ /^\s*MAINTAINERS\s*\|/) {
@@ -2759,10 +2766,10 @@ sub process {
 			     "A patch subject line should describe the change not the tool that found it\n" . $herecurr);
 		}
 
-# Check for unwanted Gerrit info
-		if ($in_commit_log && $line =~ /^\s*change-id:/i) {
+# Check for Gerrit Change-Ids not in any patch context
+		if ($realfile eq '' && !$has_patch_separator && $line =~ /^\s*change-id:/i) {
 			ERROR("GERRIT_CHANGE_ID",
-			      "Remove Gerrit Change-Id's before submitting upstream.\n" . $herecurr);
+			      "Remove Gerrit Change-Id's before submitting upstream\n" . $herecurr);
 		}
 
 # Check if the commit log is in a possible stack dump
-- 
cgit v1.2.3


From 50c92900214dd9a55bcecc3c53e90d072aff6560 Mon Sep 17 00:00:00 2001
From: Lubomir Rintel <lkundrak@v3.sk>
Date: Mon, 6 Apr 2020 20:11:13 -0700
Subject: checkpatch: check proper licensing of Devicetree bindings

According to Devicetree maintainers (see Link: below), the Devicetree
binding documents are preferrably licensed (GPL-2.0-only OR BSD-2-Clause).

Let's check that.  The actual check is a bit more relaxed, to allow more
liberal but compatible licensing (e.g.  GPL-2.0-or-later OR BSD-2-Clause).

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joe Perches <joe@perches.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Cc: Jonas Karlman <jonas@kwiboo.se>,
Cc: Jernej Skrabec <jernej.skrabec@siol.net>,
Cc: Mark Rutland <mark.rutland@arm.com>,
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>,
Link: https://lore.kernel.org/lkml/20200108142132.GA4830@bogus/
Link: http://lkml.kernel.org/r/20200309215153.38824-1-lkundrak@v3.sk
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 64cfd617eefc..460a6b5b9d9a 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3157,6 +3157,17 @@ sub process {
 						WARN("SPDX_LICENSE_TAG",
 						     "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr);
 					}
+					if ($realfile =~ m@^Documentation/devicetree/bindings/@ &&
+					    not $spdx_license =~ /GPL-2\.0.*BSD-2-Clause/) {
+						my $msg_level = \&WARN;
+						$msg_level = \&CHK if ($file);
+						if (&{$msg_level}("SPDX_LICENSE_TAG",
+
+								  "DT binding documents should be licensed (GPL-2.0-only OR BSD-2-Clause)\n" . $herecurr) &&
+						    $fix) {
+							$fixed[$fixlinenr] =~ s/SPDX-License-Identifier: .*/SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)/;
+						}
+					}
 				}
 			}
 		}
-- 
cgit v1.2.3


From 16b7f3c89907acf947500f0c20dcff44f651d795 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Mon, 6 Apr 2020 20:11:17 -0700
Subject: checkpatch: avoid warning about uninitialized_var()

WARNING: function definition argument 'flags' should also have an identifier name
#26: FILE: drivers/tty/serial/sh-sci.c:1348:
+       unsigned long uninitialized_var(flags);

Special-case uninitialized_var() to prevent this.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/7db7944761b0bd88c70eb17d4b7f40fe589e14ed.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

(limited to 'scripts')

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 460a6b5b9d9a..d64c67b67e3c 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4071,7 +4071,7 @@ sub process {
 		}
 
 # check for function declarations without arguments like "int foo()"
-		if ($line =~ /(\b$Type\s+$Ident)\s*\(\s*\)/) {
+		if ($line =~ /(\b$Type\s*$Ident)\s*\(\s*\)/) {
 			if (ERROR("FUNCTION_WITHOUT_ARGS",
 				  "Bad function definition - $1() should probably be $1(void)\n" . $herecurr) &&
 			    $fix) {
@@ -6287,13 +6287,17 @@ sub process {
 		}
 
 # check for function declarations that have arguments without identifier names
+# while avoiding uninitialized_var(x)
 		if (defined $stat &&
-		    $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s &&
-		    $1 ne "void") {
-			my $args = trim($1);
+		    $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:($Ident)|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s &&
+		    (!defined($1) ||
+		     (defined($1) && $1 ne "uninitialized_var")) &&
+		     $2 ne "void") {
+			my $args = trim($2);
 			while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) {
 				my $arg = trim($1);
-				if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) {
+				if ($arg =~ /^$Type$/ &&
+					$arg !~ /enum\s+$Ident$/) {
 					WARN("FUNCTION_ARGUMENTS",
 					     "function definition argument '$arg' should also have an identifier name\n" . $herecurr);
 				}
-- 
cgit v1.2.3


From 0887a7ebc97770c7870abf3075a2e8cd502a7f52 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Mon, 6 Apr 2020 20:12:27 -0700
Subject: ubsan: add trap instrumentation option

Patch series "ubsan: Split out bounds checker", v5.

This splits out the bounds checker so it can be individually used.  This
is enabled in Android and hopefully for syzbot.  Includes LKDTM tests for
behavioral corner-cases (beyond just the bounds checker), and adjusts
ubsan and kasan slightly for correct panic handling.

This patch (of 6):

The Undefined Behavior Sanitizer can operate in two modes: warning
reporting mode via lib/ubsan.c handler calls, or trap mode, which uses
__builtin_trap() as the handler.  Using lib/ubsan.c means the kernel image
is about 5% larger (due to all the debugging text and reporting structures
to capture details about the warning conditions).  Using the trap mode,
the image size changes are much smaller, though at the loss of the
"warning only" mode.

In order to give greater flexibility to system builders that want minimal
changes to image size and are prepared to deal with kernel code being
aborted and potentially destabilizing the system, this introduces
CONFIG_UBSAN_TRAP.  The resulting image sizes comparison:

   text    data     bss       dec       hex     filename
19533663   6183037  18554956  44271656  2a38828 vmlinux.stock
19991849   7618513  18874448  46484810  2c54d4a vmlinux.ubsan
19712181   6284181  18366540  44362902  2a4ec96 vmlinux.ubsan-trap

CONFIG_UBSAN=y:      image +4.8% (text +2.3%, data +18.9%)
CONFIG_UBSAN_TRAP=y: image +0.2% (text +0.9%, data +1.6%)

Additionally adjusts the CONFIG_UBSAN Kconfig help for clarity and removes
the mention of non-existing boot param "ubsan_handle".

Suggested-by: Elena Petrova <lenaptr@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Link: http://lkml.kernel.org/r/20200227193516.32566-2-keescook@chromium.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/Kconfig.ubsan      | 22 ++++++++++++++++++----
 lib/Makefile           |  2 ++
 scripts/Makefile.ubsan |  9 +++++++--
 3 files changed, 27 insertions(+), 6 deletions(-)

(limited to 'scripts')

diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan
index 0e04fcb3ab3d..9deb655838b0 100644
--- a/lib/Kconfig.ubsan
+++ b/lib/Kconfig.ubsan
@@ -5,11 +5,25 @@ config ARCH_HAS_UBSAN_SANITIZE_ALL
 config UBSAN
 	bool "Undefined behaviour sanity checker"
 	help
-	  This option enables undefined behaviour sanity checker
+	  This option enables the Undefined Behaviour sanity checker.
 	  Compile-time instrumentation is used to detect various undefined
-	  behaviours in runtime. Various types of checks may be enabled
-	  via boot parameter ubsan_handle
-	  (see: Documentation/dev-tools/ubsan.rst).
+	  behaviours at runtime. For more details, see:
+	  Documentation/dev-tools/ubsan.rst
+
+config UBSAN_TRAP
+	bool "On Sanitizer warnings, abort the running kernel code"
+	depends on UBSAN
+	depends on $(cc-option, -fsanitize-undefined-trap-on-error)
+	help
+	  Building kernels with Sanitizer features enabled tends to grow
+	  the kernel size by around 5%, due to adding all the debugging
+	  text on failure paths. To avoid this, Sanitizer instrumentation
+	  can just issue a trap. This reduces the kernel size overhead but
+	  turns all warnings (including potentially harmless conditions)
+	  into full exceptions that abort the running kernel code
+	  (regardless of context, locks held, etc), which may destabilize
+	  the system. For some system builders this is an acceptable
+	  trade-off.
 
 config UBSAN_SANITIZE_ALL
 	bool "Enable instrumentation for the entire kernel"
diff --git a/lib/Makefile b/lib/Makefile
index 3fc06399295d..685aee60de1d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -286,7 +286,9 @@ quiet_cmd_build_OID_registry = GEN     $@
 clean-files	+= oid_registry_data.c
 
 obj-$(CONFIG_UCS2_STRING) += ucs2_string.o
+ifneq ($(CONFIG_UBSAN_TRAP),y)
 obj-$(CONFIG_UBSAN) += ubsan.o
+endif
 
 UBSAN_SANITIZE_ubsan.o := n
 KASAN_SANITIZE_ubsan.o := n
diff --git a/scripts/Makefile.ubsan b/scripts/Makefile.ubsan
index 019771b845c5..668a91510bfe 100644
--- a/scripts/Makefile.ubsan
+++ b/scripts/Makefile.ubsan
@@ -1,5 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 ifdef CONFIG_UBSAN
+
+ifdef CONFIG_UBSAN_ALIGNMENT
+      CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment)
+endif
+
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=shift)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=integer-divide-by-zero)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=unreachable)
@@ -9,8 +14,8 @@ ifdef CONFIG_UBSAN
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=bool)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=enum)
 
-ifdef CONFIG_UBSAN_ALIGNMENT
-      CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment)
+ifdef CONFIG_UBSAN_TRAP
+      CFLAGS_UBSAN += $(call cc-option, -fsanitize-undefined-trap-on-error)
 endif
 
       # -fsanitize=* options makes GCC less smart than usual and
-- 
cgit v1.2.3


From 277a10850f9f4cb3429faf59293e2c89b1a320be Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Mon, 6 Apr 2020 20:12:31 -0700
Subject: ubsan: split "bounds" checker from other options

In order to do kernel builds with the bounds checker individually
available, introduce CONFIG_UBSAN_BOUNDS, with the remaining options under
CONFIG_UBSAN_MISC.

For example, using this, we can start to expand the coverage syzkaller is
providing.  Right now, all of UBSan is disabled for syzbot builds because
taken as a whole, it is too noisy.  This will let us focus on one feature
at a time.

For the bounds checker specifically, this provides a mechanism to
eliminate an entire class of array overflows with close to zero
performance overhead (I cannot measure a difference).  In my (mostly)
defconfig, enabling bounds checking adds ~4200 checks to the kernel.
Performance changes are in the noise, likely due to the branch predictors
optimizing for the non-fail path.

Some notes on the bounds checker:

- it does not instrument {mem,str}*()-family functions, it only
  instruments direct indexed accesses (e.g. "foo[i]"). Dealing with
  the {mem,str}*()-family functions is a work-in-progress around
  CONFIG_FORTIFY_SOURCE[1].

- it ignores flexible array members, including the very old single
  byte (e.g. "int foo[1];") declarations. (Note that GCC's
  implementation appears to ignore _all_ trailing arrays, but Clang only
  ignores empty, 0, and 1 byte arrays[2].)

[1] https://github.com/KSPP/linux/issues/6
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92589

Suggested-by: Elena Petrova <lenaptr@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Link: http://lkml.kernel.org/r/20200227193516.32566-3-keescook@chromium.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/Kconfig.ubsan      | 29 ++++++++++++++++++++++++-----
 scripts/Makefile.ubsan |  7 ++++++-
 2 files changed, 30 insertions(+), 6 deletions(-)

(limited to 'scripts')

diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan
index 9deb655838b0..48469c95d78e 100644
--- a/lib/Kconfig.ubsan
+++ b/lib/Kconfig.ubsan
@@ -2,7 +2,7 @@
 config ARCH_HAS_UBSAN_SANITIZE_ALL
 	bool
 
-config UBSAN
+menuconfig UBSAN
 	bool "Undefined behaviour sanity checker"
 	help
 	  This option enables the Undefined Behaviour sanity checker.
@@ -10,9 +10,10 @@ config UBSAN
 	  behaviours at runtime. For more details, see:
 	  Documentation/dev-tools/ubsan.rst
 
+if UBSAN
+
 config UBSAN_TRAP
 	bool "On Sanitizer warnings, abort the running kernel code"
-	depends on UBSAN
 	depends on $(cc-option, -fsanitize-undefined-trap-on-error)
 	help
 	  Building kernels with Sanitizer features enabled tends to grow
@@ -25,9 +26,26 @@ config UBSAN_TRAP
 	  the system. For some system builders this is an acceptable
 	  trade-off.
 
+config UBSAN_BOUNDS
+	bool "Perform array index bounds checking"
+	default UBSAN
+	help
+	  This option enables detection of directly indexed out of bounds
+	  array accesses, where the array size is known at compile time.
+	  Note that this does not protect array overflows via bad calls
+	  to the {str,mem}*cpy() family of functions (that is addressed
+	  by CONFIG_FORTIFY_SOURCE).
+
+config UBSAN_MISC
+	bool "Enable all other Undefined Behavior sanity checks"
+	default UBSAN
+	help
+	  This option enables all sanity checks that don't have their
+	  own Kconfig options. Disable this if you only want to have
+	  individually selected checks.
+
 config UBSAN_SANITIZE_ALL
 	bool "Enable instrumentation for the entire kernel"
-	depends on UBSAN
 	depends on ARCH_HAS_UBSAN_SANITIZE_ALL
 
 	# We build with -Wno-maybe-uninitilzed, but we still want to
@@ -44,7 +62,6 @@ config UBSAN_SANITIZE_ALL
 
 config UBSAN_NO_ALIGNMENT
 	bool "Disable checking of pointers alignment"
-	depends on UBSAN
 	default y if HAVE_EFFICIENT_UNALIGNED_ACCESS
 	help
 	  This option disables the check of unaligned memory accesses.
@@ -57,7 +74,9 @@ config UBSAN_ALIGNMENT
 
 config TEST_UBSAN
 	tristate "Module for testing for undefined behavior detection"
-	depends on m && UBSAN
+	depends on m
 	help
 	  This is a test module for UBSAN.
 	  It triggers various undefined behavior, and detect it.
+
+endif	# if UBSAN
diff --git a/scripts/Makefile.ubsan b/scripts/Makefile.ubsan
index 668a91510bfe..5b15bc425ec9 100644
--- a/scripts/Makefile.ubsan
+++ b/scripts/Makefile.ubsan
@@ -5,14 +5,19 @@ ifdef CONFIG_UBSAN_ALIGNMENT
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment)
 endif
 
+ifdef CONFIG_UBSAN_BOUNDS
+      CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds)
+endif
+
+ifdef CONFIG_UBSAN_MISC
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=shift)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=integer-divide-by-zero)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=unreachable)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=signed-integer-overflow)
-      CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=object-size)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=bool)
       CFLAGS_UBSAN += $(call cc-option, -fsanitize=enum)
+endif
 
 ifdef CONFIG_UBSAN_TRAP
       CFLAGS_UBSAN += $(call cc-option, -fsanitize-undefined-trap-on-error)
-- 
cgit v1.2.3


From afe956c577b2d5a3d9834e4424587c1ebcf90c4c Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Thu, 26 Mar 2020 12:41:55 -0700
Subject: kbuild: Enable -Wtautological-compare

Currently, we disable -Wtautological-compare, which in turn disables a
bunch of more specific tautological comparison warnings that are useful
for the kernel such as -Wtautological-bitwise-compare. See clang's
documentation below for the other warnings that are suppressed by
-Wtautological-compare. Now that all of the major/noisy warnings have
been fixed, enable -Wtautological-compare so that more issues can be
caught at build time by various continuous integration setups.

-Wtautological-constant-out-of-range-compare is kept disabled under a
normal build but visible at W=1 because there are places in the kernel
where a constant or variable size can change based on the kernel
configuration. These are not fixed in a clean/concise way and the ones
I have audited so far appear to be harmless. It is not a subgroup but
rather just one warning so we do not lose out on much coverage by
default.

Link: https://github.com/ClangBuiltLinux/linux/issues/488
Link: http://releases.llvm.org/10.0.0/tools/clang/docs/DiagnosticsReference.html#wtautological-compare
Link: https://bugs.llvm.org/show_bug.cgi?id=42666
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Makefile                   | 2 --
 scripts/Makefile.extrawarn | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index c91342953d9e..f7584fee14a0 100644
--- a/Makefile
+++ b/Makefile
@@ -747,8 +747,6 @@ ifdef CONFIG_CC_IS_CLANG
 KBUILD_CPPFLAGS += -Qunused-arguments
 KBUILD_CFLAGS += -Wno-format-invalid-specifier
 KBUILD_CFLAGS += -Wno-gnu
-# Quiet clang warning: comparison of unsigned expression < 0 is always false
-KBUILD_CFLAGS += -Wno-tautological-compare
 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
 # See modpost pattern 2
diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index ca08f2fe7c34..4aea7cf71d11 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -49,6 +49,7 @@ KBUILD_CFLAGS += -Wno-format
 KBUILD_CFLAGS += -Wno-sign-compare
 KBUILD_CFLAGS += -Wno-format-zero-length
 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast)
+KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare
 endif
 
 endif
-- 
cgit v1.2.3


From 77342a02ff6e14645916d85c8550dd1011c4f7d7 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sun, 29 Mar 2020 20:08:32 +0900
Subject: gcc-plugins: drop support for GCC <= 4.7

Nobody was opposed to raising minimum GCC version to 4.8 [1]
So, we will drop GCC <= 4.7 support sooner or later.

We always use C++ compiler for building plugins for GCC >= 4.8.

This commit drops the plugin support for GCC <= 4.7 a bit earlier,
which allows us to dump lots of code.

[1] https://lkml.org/lkml/2020/1/23/545

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
---
 scripts/Kconfig.include      |  3 ---
 scripts/Makefile.build       |  2 +-
 scripts/Makefile.clean       |  1 -
 scripts/Makefile.host        | 23 +-----------------
 scripts/gcc-plugin.sh        | 55 ++++----------------------------------------
 scripts/gcc-plugins/Kconfig  | 12 ++--------
 scripts/gcc-plugins/Makefile | 21 +++++------------
 7 files changed, 14 insertions(+), 103 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index 8074f14d9d0d..c264da2b9b30 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -48,9 +48,6 @@ $(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)
 # Fail if the linker is gold as it's not capable of linking the kernel proper
 $(error-if,$(success, $(LD) -v | grep -q gold), gold linker '$(LD)' not supported)
 
-# gcc version including patch level
-gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh $(CC))
-
 # machine bit flags
 #  $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise.
 #  $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise.
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index a1730d42e5f3..eec789d7a63a 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -46,7 +46,7 @@ include $(kbuild-file)
 include scripts/Makefile.lib
 
 # Do not include host rules unless needed
-ifneq ($(hostprogs)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
+ifneq ($(hostprogs)$(hostcxxlibs-y)$(hostcxxlibs-m),)
 include scripts/Makefile.host
 endif
 
diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index 1e4206566a82..075f0cc2d8d7 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -30,7 +30,6 @@ subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
 __clean-files	:= $(extra-y) $(extra-m) $(extra-)       \
 		   $(always) $(always-y) $(always-m) $(always-) $(targets) $(clean-files)   \
 		   $(hostprogs) $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \
-		   $(hostlibs-y) $(hostlibs-m) $(hostlibs-) \
 		   $(hostcxxlibs-y) $(hostcxxlibs-m)
 
 __clean-files   := $(filter-out $(no-clean-files), $(__clean-files))
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 3b7121d43324..2045855d0b75 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -39,7 +39,6 @@ $(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
 # They are linked as C++ code to the executable qconf
 
 __hostprogs := $(sort $(hostprogs))
-host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m))
 host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m))
 
 # C code
@@ -63,7 +62,6 @@ host-cxxmulti	:= $(foreach m,$(__hostprogs),$(if $($(m)-cxxobjs),$(m)))
 host-cxxobjs	:= $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
 
 # Object (.o) files used by the shared libaries
-host-cshobjs	:= $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs))))
 host-cxxshobjs	:= $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs))))
 
 host-csingle	:= $(addprefix $(obj)/,$(host-csingle))
@@ -71,9 +69,7 @@ host-cmulti	:= $(addprefix $(obj)/,$(host-cmulti))
 host-cobjs	:= $(addprefix $(obj)/,$(host-cobjs))
 host-cxxmulti	:= $(addprefix $(obj)/,$(host-cxxmulti))
 host-cxxobjs	:= $(addprefix $(obj)/,$(host-cxxobjs))
-host-cshlib	:= $(addprefix $(obj)/,$(host-cshlib))
 host-cxxshlib	:= $(addprefix $(obj)/,$(host-cxxshlib))
-host-cshobjs	:= $(addprefix $(obj)/,$(host-cshobjs))
 host-cxxshobjs	:= $(addprefix $(obj)/,$(host-cxxshobjs))
 
 #####
@@ -140,13 +136,6 @@ quiet_cmd_host-cxxobjs	= HOSTCXX $@
 $(host-cxxobjs): $(obj)/%.o: $(src)/%.cc FORCE
 	$(call if_changed_dep,host-cxxobjs)
 
-# Compile .c file, create position independent .o file
-# host-cshobjs -> .o
-quiet_cmd_host-cshobjs	= HOSTCC  -fPIC $@
-      cmd_host-cshobjs	= $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $<
-$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE
-	$(call if_changed_dep,host-cshobjs)
-
 # Compile .c file, create position independent .o file
 # Note that plugin capable gcc versions can be either C or C++ based
 # therefore plugin source files have to be compilable in both C and C++ mode.
@@ -157,16 +146,6 @@ quiet_cmd_host-cxxshobjs	= HOSTCXX -fPIC $@
 $(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE
 	$(call if_changed_dep,host-cxxshobjs)
 
-# Link a shared library, based on position independent .o files
-# *.o -> .so shared library (host-cshlib)
-quiet_cmd_host-cshlib	= HOSTLLD -shared $@
-      cmd_host-cshlib	= $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \
-			  $(addprefix $(obj)/, $($(target-stem)-objs)) \
-			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem).so)
-$(host-cshlib): FORCE
-	$(call if_changed,host-cshlib)
-$(call multi_depend, $(host-cshlib), .so, -objs)
-
 # Link a shared library, based on position independent .o files
 # *.o -> .so shared library (host-cxxshlib)
 quiet_cmd_host-cxxshlib	= HOSTLLD -shared $@
@@ -178,4 +157,4 @@ $(host-cxxshlib): FORCE
 $(call multi_depend, $(host-cxxshlib), .so, -objs)
 
 targets += $(host-csingle)  $(host-cmulti) $(host-cobjs)\
-	   $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs)
+	   $(host-cxxmulti) $(host-cxxobjs) $(host-cxxshlib) $(host-cxxshobjs)
diff --git a/scripts/gcc-plugin.sh b/scripts/gcc-plugin.sh
index d3caefe53eab..b79fd0bea838 100755
--- a/scripts/gcc-plugin.sh
+++ b/scripts/gcc-plugin.sh
@@ -1,49 +1,14 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
-srctree=$(dirname "$0")
-
-SHOW_ERROR=
-if [ "$1" = "--show-error" ] ; then
-	SHOW_ERROR=1
-	shift || true
-fi
-
-gccplugins_dir=$($3 -print-file-name=plugin)
-plugincc=$($1 -E -x c++ - -o /dev/null -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
-#include "gcc-common.h"
-#if BUILDING_GCC_VERSION >= 4008 || defined(ENABLE_BUILD_WITH_CXX)
-#warning $2 CXX
-#else
-#warning $1 CC
-#endif
-EOF
-)
 
-if [ $? -ne 0 ]
-then
-	if [ -n "$SHOW_ERROR" ] ; then
-		echo "${plugincc}" >&2
-	fi
-	exit 1
-fi
+set -e
 
-case "$plugincc" in
-	*"$1 CC"*)
-		echo "$1"
-		exit 0
-		;;
-
-	*"$2 CXX"*)
-		# the c++ compiler needs another test, see below
-		;;
+srctree=$(dirname "$0")
 
-	*)
-		exit 1
-		;;
-esac
+gccplugins_dir=$($* -print-file-name=plugin)
 
 # we need a c++ compiler that supports the designated initializer GNU extension
-plugincc=$($2 -c -x c++ -std=gnu++98 - -fsyntax-only -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
+$HOSTCC -c -x c++ -std=gnu++98 - -fsyntax-only -I $srctree/gcc-plugins -I $gccplugins_dir/include 2>/dev/null <<EOF
 #include "gcc-common.h"
 class test {
 public:
@@ -52,15 +17,3 @@ public:
 	.test = 1
 };
 EOF
-)
-
-if [ $? -eq 0 ]
-then
-	echo "$2"
-	exit 0
-fi
-
-if [ -n "$SHOW_ERROR" ] ; then
-	echo "${plugincc}" >&2
-fi
-exit 1
diff --git a/scripts/gcc-plugins/Kconfig b/scripts/gcc-plugins/Kconfig
index f8ca236d6165..013ba3a57669 100644
--- a/scripts/gcc-plugins/Kconfig
+++ b/scripts/gcc-plugins/Kconfig
@@ -1,13 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
-preferred-plugin-hostcc := $(if-success,[ $(gcc-version) -ge 40800 ],$(HOSTCXX),$(HOSTCC))
-
-config PLUGIN_HOSTCC
-	string
-	default "$(shell,$(srctree)/scripts/gcc-plugin.sh "$(preferred-plugin-hostcc)" "$(HOSTCXX)" "$(CC)")" if CC_IS_GCC
-	help
-	  Host compiler used to build GCC plugins.  This can be $(HOSTCXX),
-	  $(HOSTCC), or a null string if GCC plugin is unsupported.
-
 config HAVE_GCC_PLUGINS
 	bool
 	help
@@ -17,7 +8,8 @@ config HAVE_GCC_PLUGINS
 menuconfig GCC_PLUGINS
 	bool "GCC plugins"
 	depends on HAVE_GCC_PLUGINS
-	depends on PLUGIN_HOSTCC != ""
+	depends on CC_IS_GCC && GCC_VERSION >= 40800
+	depends on $(success,$(srctree)/scripts/gcc-plugin.sh $(CC))
 	default y
 	help
 	  GCC plugins are loadable modules that provide extra features to the
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index efff00959a9c..f22858b2c3d6 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -1,18 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0
-PLUGINCC := $(CONFIG_PLUGIN_HOSTCC:"%"=%)
 GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
 
-ifeq ($(PLUGINCC),$(HOSTCC))
-  HOSTLIBS := hostlibs
-  HOST_EXTRACFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu99 -ggdb
-  export HOST_EXTRACFLAGS
-else
-  HOSTLIBS := hostcxxlibs
-  HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
-  HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
-  HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat
-  export HOST_EXTRACXXFLAGS
-endif
+HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
+HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
+HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable -Wno-c++11-compat
 
 $(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
 quiet_cmd_create_randomize_layout_seed = GENSEED $@
@@ -22,9 +13,9 @@ $(objtree)/$(obj)/randomize_layout_seed.h: FORCE
 	$(call if_changed,create_randomize_layout_seed)
 targets = randomize_layout_seed.h randomize_layout_hash.h
 
-$(HOSTLIBS)-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
-always-y := $($(HOSTLIBS)-y)
+hostcxxlibs-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
+always-y := $(hostcxxlibs-y)
 
-$(foreach p,$($(HOSTLIBS)-y:%.so=%),$(eval $(p)-objs := $(p).o))
+$(foreach p,$(hostcxxlibs-y:%.so=%),$(eval $(p)-objs := $(p).o))
 
 clean-files += *.so
-- 
cgit v1.2.3


From cf497b922386c5e00925cb4d909c319ed27bca18 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Thu, 2 Apr 2020 11:27:58 +0200
Subject: kconfig: qconf: clean deprecated warnings
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The recommended way to initialize a null string is with
QString(). This is there at least since Qt5.5, with is
when qconf was ported to Qt5.

Fix those warnings:

	scripts/kconfig/qconf.cc: In member function ‘void ConfigItem::updateMenu()’:
	scripts/kconfig/qconf.cc:158:31: warning: ‘QString::null’ is deprecated: use QString() [-Wdeprecated-declarations]
	  158 |    setText(noColIdx, QString::null);
	      |                               ^~~~
	In file included from /usr/include/qt5/QtCore/qobject.h:47,
	                 from /usr/include/qt5/QtWidgets/qwidget.h:45,
	                 from /usr/include/qt5/QtWidgets/qmainwindow.h:44,
	                 from /usr/include/qt5/QtWidgets/QMainWindow:1,
	                 from scripts/kconfig/qconf.cc:9:

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 50a5245d87bb..3ea255a66c55 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -154,9 +154,9 @@ void ConfigItem::updateMenu(void)
 
 		if (!sym_is_changeable(sym) && list->optMode == normalOpt) {
 			setPixmap(promptColIdx, QIcon());
-			setText(noColIdx, QString::null);
-			setText(modColIdx, QString::null);
-			setText(yesColIdx, QString::null);
+			setText(noColIdx, QString());
+			setText(modColIdx, QString());
+			setText(yesColIdx, QString());
 			break;
 		}
 		expr = sym_get_tristate_value(sym);
@@ -276,7 +276,7 @@ void ConfigLineEdit::show(ConfigItem* i)
 	if (sym_get_string_value(item->menu->sym))
 		setText(QString::fromLocal8Bit(sym_get_string_value(item->menu->sym)));
 	else
-		setText(QString::null);
+		setText(QString());
 	Parent::show();
 	setFocus();
 }
-- 
cgit v1.2.3


From 5752ff07fd90d764d96e3c586cc95c09598abfdd Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Thu, 2 Apr 2020 11:27:59 +0200
Subject: kconfig: qconf: Change title for the item window

Both main config window and the item window have "Option"
name. That sounds weird, and makes harder to debug issues
of a window appearing at the wrong place.

So, change the title to reflect the contents of each
window.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 3ea255a66c55..0e66dc73e177 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -316,7 +316,10 @@ ConfigList::ConfigList(ConfigView* p, const char *name)
 	setVerticalScrollMode(ScrollPerPixel);
 	setHorizontalScrollMode(ScrollPerPixel);
 
-	setHeaderLabels(QStringList() << "Option" << "Name" << "N" << "M" << "Y" << "Value");
+	if (mode == symbolMode)
+		setHeaderLabels(QStringList() << "Item" << "Name" << "N" << "M" << "Y" << "Value");
+	else
+		setHeaderLabels(QStringList() << "Option" << "Name" << "N" << "M" << "Y" << "Value");
 
 	connect(this, SIGNAL(itemSelectionChanged(void)),
 		SLOT(updateSelection(void)));
@@ -397,6 +400,11 @@ void ConfigList::updateSelection(void)
 	struct menu *menu;
 	enum prop_type type;
 
+	if (mode == symbolMode)
+		setHeaderLabels(QStringList() << "Item" << "Name" << "N" << "M" << "Y" << "Value");
+	else
+		setHeaderLabels(QStringList() << "Option" << "Name" << "N" << "M" << "Y" << "Value");
+
 	if (selectedItems().count() == 0)
 		return;
 
-- 
cgit v1.2.3


From cce1faba82645fee899ccef5b7d3050fed3a3d10 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Thu, 2 Apr 2020 11:28:00 +0200
Subject: kconfig: qconf: fix the content of the main widget

The port to Qt5 tried to preserve the same way as it used
to work with Qt3 and Qt4. However, at least with newer
versions of Qt5 (5.13), this doesn't work properly.

Change the schema by adding a vertical layout, in order
for it to start working properly again.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 0e66dc73e177..3f7bee7051e0 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1360,21 +1360,32 @@ ConfigMainWindow::ConfigMainWindow(void)
 	if ((x.isValid())&&(y.isValid()))
 		move(x.toInt(), y.toInt());
 
-	split1 = new QSplitter(this);
+	QWidget *widget = new QWidget(this);
+	QVBoxLayout *layout = new QVBoxLayout(widget);
+	setCentralWidget(widget);
+
+	split1 = new QSplitter(widget);
 	split1->setOrientation(Qt::Horizontal);
-	setCentralWidget(split1);
+	split1->setChildrenCollapsible(false);
 
-	menuView = new ConfigView(split1, "menu");
+	menuView = new ConfigView(widget, "menu");
 	menuList = menuView->list;
 
-	split2 = new QSplitter(split1);
+	split2 = new QSplitter(widget);
+	split2->setChildrenCollapsible(false);
 	split2->setOrientation(Qt::Vertical);
 
 	// create config tree
-	configView = new ConfigView(split2, "config");
+	configView = new ConfigView(widget, "config");
 	configList = configView->list;
 
-	helpText = new ConfigInfoView(split2, "help");
+	helpText = new ConfigInfoView(widget, "help");
+
+	layout->addWidget(split2);
+	split2->addWidget(split1);
+	split1->addWidget(configView);
+	split1->addWidget(menuView);
+	split2->addWidget(helpText);
 
 	setTabOrder(configList, helpText);
 	configList->setFocus();
-- 
cgit v1.2.3


From b311142fcfd37b58dfec72e040ed04949eb1ac86 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Thu, 2 Apr 2020 11:28:01 +0200
Subject: kconfig: qconf: fix support for the split view mode

At least on my tests (building against Qt5.13), it seems to
me that, since Kernel 3.14, the split view mode is broken.

Maybe it was not a top priority during the conversion time.

Anyway, this patch changes the logic in order to properly
support the split view mode and the single view mode.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 33 ++++++++++++++++++++++++++-------
 scripts/kconfig/qconf.h  |  2 ++
 2 files changed, 28 insertions(+), 7 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 3f7bee7051e0..4f9c695c1af8 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -742,7 +742,10 @@ void ConfigList::keyPressEvent(QKeyEvent* ev)
 		type = menu->prompt ? menu->prompt->type : P_UNKNOWN;
 		if (type == P_MENU && rootEntry != menu &&
 		    mode != fullMode && mode != menuMode) {
-			emit menuSelected(menu);
+			if (mode == menuMode)
+				emit menuSelected(menu);
+			else
+				emit itemSelected(menu);
 			break;
 		}
 	case Qt::Key_Space:
@@ -849,9 +852,12 @@ void ConfigList::mouseDoubleClickEvent(QMouseEvent* e)
 	if (!menu)
 		goto skip;
 	ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
-	if (ptype == P_MENU && (mode == singleMode || mode == symbolMode))
-		emit menuSelected(menu);
-	else if (menu->sym)
+	if (ptype == P_MENU) {
+		if (mode == singleMode)
+			emit itemSelected(menu);
+		else if (mode == symbolMode)
+			emit menuSelected(menu);
+	} else if (menu->sym)
 		changeValue(item);
 
 skip:
@@ -1503,6 +1509,8 @@ ConfigMainWindow::ConfigMainWindow(void)
 		helpText, SLOT(setInfo(struct menu *)));
 	connect(configList, SIGNAL(menuSelected(struct menu *)),
 		SLOT(changeMenu(struct menu *)));
+	connect(configList, SIGNAL(itemSelected(struct menu *)),
+		SLOT(changeItens(struct menu *)));
 	connect(configList, SIGNAL(parentSelected()),
 		SLOT(goBack()));
 	connect(menuList, SIGNAL(menuChanged(struct menu *)),
@@ -1599,15 +1607,26 @@ void ConfigMainWindow::searchConfig(void)
 	searchWindow->show();
 }
 
-void ConfigMainWindow::changeMenu(struct menu *menu)
+void ConfigMainWindow::changeItens(struct menu *menu)
 {
 	configList->setRootMenu(menu);
+
 	if (configList->rootEntry->parent == &rootmenu)
 		backAction->setEnabled(false);
 	else
 		backAction->setEnabled(true);
 }
 
+void ConfigMainWindow::changeMenu(struct menu *menu)
+{
+	menuList->setRootMenu(menu);
+
+	if (menuList->rootEntry->parent == &rootmenu)
+		backAction->setEnabled(false);
+	else
+		backAction->setEnabled(true);
+}
+
 void ConfigMainWindow::setMenuLink(struct menu *menu)
 {
 	struct menu *parent;
@@ -1717,14 +1736,14 @@ void ConfigMainWindow::showSplitView(void)
 	fullViewAction->setEnabled(true);
 	fullViewAction->setChecked(false);
 
-	configList->mode = symbolMode;
+	configList->mode = menuMode;
 	if (configList->rootEntry == &rootmenu)
 		configList->updateListAll();
 	else
 		configList->setRootMenu(&rootmenu);
 	configList->setAllOpen(true);
 	configApp->processEvents();
-	menuList->mode = menuMode;
+	menuList->mode = symbolMode;
 	menuList->setRootMenu(&rootmenu);
 	menuList->setAllOpen(true);
 	menuView->show();
diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index 45bfe9b2b966..c879d79ce817 100644
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -71,6 +71,7 @@ public slots:
 signals:
 	void menuChanged(struct menu *menu);
 	void menuSelected(struct menu *menu);
+	void itemSelected(struct menu *menu);
 	void parentSelected(void);
 	void gotFocus(struct menu *);
 
@@ -298,6 +299,7 @@ public:
 	ConfigMainWindow(void);
 public slots:
 	void changeMenu(struct menu *);
+	void changeItens(struct menu *);
 	void setMenuLink(struct menu *);
 	void listFocusChanged(void);
 	void goBack(void);
-- 
cgit v1.2.3


From e1f7769f6094fb714a63af6be7e8f2d4c86ddcd5 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Thu, 2 Apr 2020 11:28:02 +0200
Subject: kconfig: qconf: remove some old bogus TODOs

The items described on those TODOs are already solved. So,
remove the comments.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 4f9c695c1af8..486b16ddba59 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -837,7 +837,7 @@ void ConfigList::mouseMoveEvent(QMouseEvent* e)
 
 void ConfigList::mouseDoubleClickEvent(QMouseEvent* e)
 {
-	QPoint p = e->pos(); // TODO: Check if this works(was contentsToViewport).
+	QPoint p = e->pos();
 	ConfigItem* item = (ConfigItem*)itemAt(p);
 	struct menu *menu;
 	enum prop_type ptype;
@@ -1771,7 +1771,6 @@ void ConfigMainWindow::showFullView(void)
 
 /*
  * ask for saving configuration before quitting
- * TODO ask only when something changed
  */
 void ConfigMainWindow::closeEvent(QCloseEvent* e)
 {
-- 
cgit v1.2.3


From 60969f02f07ae1445730c7b293c421d179da729c Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Date: Thu, 2 Apr 2020 11:28:03 +0200
Subject: kconfig: qconf: Fix a few alignment issues

There are a few items with wrong alignments. Solve them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

(limited to 'scripts')

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 486b16ddba59..c0ac8f7b5f1a 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -633,7 +633,7 @@ void ConfigList::updateMenuList(ConfigItem *parent, struct menu* menu)
 			last = item;
 			continue;
 		}
-	hide:
+hide:
 		if (item && item->menu == child) {
 			last = parent->firstChild();
 			if (last == item)
@@ -698,7 +698,7 @@ void ConfigList::updateMenuList(ConfigList *parent, struct menu* menu)
 			last = item;
 			continue;
 		}
-	hide:
+hide:
 		if (item && item->menu == child) {
 			last = (ConfigItem*)parent->topLevelItem(0);
 			if (last == item)
@@ -1237,10 +1237,11 @@ QMenu* ConfigInfoView::createStandardContextMenu(const QPoint & pos)
 {
 	QMenu* popup = Parent::createStandardContextMenu(pos);
 	QAction* action = new QAction("Show Debug Info", popup);
-	  action->setCheckable(true);
-	  connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
-	  connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setOn(bool)));
-	  action->setChecked(showDebug());
+
+	action->setCheckable(true);
+	connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
+	connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setOn(bool)));
+	action->setChecked(showDebug());
 	popup->addSeparator();
 	popup->addAction(action);
 	return popup;
-- 
cgit v1.2.3


From 4dcc9a88448a65a1e855228917cfbb92ac4b4f45 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Thu, 2 Apr 2020 01:18:37 -0700
Subject: kbuild: mkcompile_h: Include $LD version in /proc/version

When doing Clang builds of the kernel, it is possible to link with
either ld.bfd (binutils) or ld.lld (LLVM), but it is not possible to
discover this from a running kernel. Add the "$LD -v" output to
/proc/version.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 init/Makefile       | 2 +-
 scripts/mkcompile_h | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

(limited to 'scripts')

diff --git a/init/Makefile b/init/Makefile
index 6246a06364d0..30aa8ab11120 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -35,4 +35,4 @@ include/generated/compile.h: FORCE
 	@$($(quiet)chk_compile.h)
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@	\
 	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)"	\
-	"$(CONFIG_PREEMPT_RT)" "$(CC) $(KBUILD_CFLAGS)"
+	"$(CONFIG_PREEMPT_RT)" "$(CC) $(KBUILD_CFLAGS)" "$(LD)"
diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 3ff26e5b2eac..5b80a4699740 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -7,6 +7,7 @@ SMP=$3
 PREEMPT=$4
 PREEMPT_RT=$5
 CC=$6
+LD=$7
 
 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
 
@@ -61,7 +62,10 @@ UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
   printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
   echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\"
 
-  echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
+  CC_VERSION=$($CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//')
+  LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
+		      | sed 's/[[:space:]]*$//')
+  printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"
 } > .tmpcompile
 
 # Only replace the real compile.h if the new one is different,
-- 
cgit v1.2.3


From c8bddf4feaabd67a7453d795672fa37c4e9e98cb Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Sat, 4 Apr 2020 16:20:34 +0900
Subject: kbuild: remove -I$(srctree)/tools/include from scripts/Makefile

I do not like to add an extra include path for every tool with no
good reason. This should be specified per file.

This line was added by commit 6520fe5564ac ("x86, realmode: 16-bit
real-mode code support for relocs tool"), which did not touch
anything else in scripts/. I see no reason to add this.

Also, remove the comment about kallsyms because we do not have any
for the rest of programs.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile | 4 ----
 1 file changed, 4 deletions(-)

(limited to 'scripts')

diff --git a/scripts/Makefile b/scripts/Makefile
index 5e75802b1a44..95ecf970c74c 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -2,10 +2,6 @@
 ###
 # scripts contains sources for various helper programs used throughout
 # the kernel for the build process.
-# ---------------------------------------------------------------------------
-# kallsyms:      Find all symbols in vmlinux
-
-HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 
 always-$(CONFIG_BUILD_BIN2C)			+= bin2c
 always-$(CONFIG_KALLSYMS)			+= kallsyms
-- 
cgit v1.2.3


From 7273ad2b08f8ac9563579d16a3cf528857b26f49 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Thu, 12 Mar 2020 07:37:25 +0900
Subject: kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y

Kbuild supports not only obj-y but also lib-y to list objects linked to
vmlinux.

The difference between them is that all the objects from obj-y are
forcibly linked to vmlinux, whereas the objects from lib-y are linked
as needed; if there is no user of a lib-y object, it is not linked.

lib-y is intended to list utility functions that may be called from all
over the place (and may be unused at all), but it is a problem for
EXPORT_SYMBOL(). Even if there is no call-site in the vmlinux, we need
to keep exported symbols for the use from loadable modules.

Commit 7f2084fa55e6 ("[kbuild] handle exports in lib-y objects reliably")
worked around it by linking a dummy object, lib-ksyms.o, which contains
references to all the symbols exported from lib.a in that directory.
It uses the linker script command, EXTERN. Unfortunately, the meaning of
EXTERN of ld.lld is different from that of ld.bfd. Therefore, this does
not work with LD=ld.lld (CBL issue #515).

Anyway, the build rule of lib-ksyms.o is somewhat tricky. So, I want to
get rid of it.

At first, I was thinking of accumulating lib-y objects into obj-y
(or even replacing lib-y with obj-y entirely), but the lib-y syntax
is used beyond the ordinary use in lib/ and arch/*/lib/.

Examples:

 - drivers/firmware/efi/libstub/Makefile builds lib.a, which is linked
   into vmlinux in the own way (arm64), or linked to the decompressor
   (arm, x86).

 - arch/alpha/lib/Makefile builds lib.a which is linked not only to
   vmlinux, but also to bootloaders in arch/alpha/boot/Makefile.

 - arch/xtensa/boot/lib/Makefile builds lib.a for use from
   arch/xtensa/boot/boot-redboot/Makefile.

One more thing, adding everything to obj-y would increase the vmlinux
size of allnoconfig (or tinyconfig).

For less impact, I tweaked the destination of lib.a at the top Makefile;
when CONFIG_MODULES=y, lib.a goes to KBUILD_VMLINUX_OBJS, which is
forcibly linked to vmlinux, otherwise lib.a goes to KBUILD_VMLINUX_LIBS
as before.

The size impact for normal usecases is quite small since at lease one
symbol in every lib-y object is eventually called by someone. In case
you are intrested, here are the figures.

x86_64_defconfig:

   text	   data	    bss	    dec	    hex	filename
19566602 5422072 1589328 26578002 1958c52 vmlinux.before
19566932 5422104 1589328 26578364 1958dbc vmlinux.after

The case with the biggest impact is allnoconfig + CONFIG_MODULES=y.

ARCH=x86 allnoconfig + CONFIG_MODULES=y:

   text	   data	    bss	    dec	    hex	filename
1175162	 254740	1220608	2650510	 28718e	vmlinux.before
1177974	 254836	1220608	2653418	 287cea	vmlinux.after

Hopefully this is still not a big deal. The per-file trimming with the
static library is not so effective after all.

If fine-grained optimization is desired, some architectures support
CONFIG_LD_DEAD_CODE_DATA_ELIMINATION, which trims dead code per-symbol
basis. When LTO is supported in mainline, even better optimization will
be possible.

Link: https://github.com/ClangBuiltLinux/linux/issues/515
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reported-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
---
 Makefile               |  7 ++++++-
 scripts/Makefile.build | 17 -----------------
 2 files changed, 6 insertions(+), 18 deletions(-)

(limited to 'scripts')

diff --git a/Makefile b/Makefile
index f7584fee14a0..1b2691057cb5 100644
--- a/Makefile
+++ b/Makefile
@@ -1034,8 +1034,13 @@ init-y		:= $(patsubst %/, %/built-in.a, $(init-y))
 core-y		:= $(patsubst %/, %/built-in.a, $(core-y))
 drivers-y	:= $(patsubst %/, %/built-in.a, $(drivers-y))
 net-y		:= $(patsubst %/, %/built-in.a, $(net-y))
+libs-y2		:= $(patsubst %/, %/built-in.a, $(filter %/, $(libs-y)))
+ifdef CONFIG_MODULES
+libs-y1		:= $(filter-out %/, $(libs-y))
+libs-y2		+= $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
+else
 libs-y1		:= $(patsubst %/, %/lib.a, $(libs-y))
-libs-y2		:= $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
+endif
 virt-y		:= $(patsubst %/, %/built-in.a, $(virt-y))
 
 # Externally visible symbols (used by link-vmlinux.sh)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index eec789d7a63a..9fcbfac15d1d 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -65,7 +65,6 @@ endif
 
 ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
 lib-target := $(obj)/lib.a
-real-obj-y += $(obj)/lib-ksyms.o
 endif
 
 ifdef need-builtin
@@ -410,22 +409,6 @@ $(lib-target): $(lib-y) FORCE
 
 targets += $(lib-target)
 
-dummy-object = $(obj)/.lib_exports.o
-ksyms-lds = $(dot-target).lds
-
-quiet_cmd_export_list = EXPORTS $@
-cmd_export_list = $(OBJDUMP) -h $< | \
-	sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\
-	rm -f $(dummy-object);\
-	echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
-	$(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\
-	rm $(dummy-object) $(ksyms-lds)
-
-$(obj)/lib-ksyms.o: $(lib-target) FORCE
-	$(call if_changed,export_list)
-
-targets += $(obj)/lib-ksyms.o
-
 endif
 
 # NOTE:
-- 
cgit v1.2.3


From 76426e238834f0927dee9925e8832179b8d56d6e Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 8 Apr 2020 00:53:52 +0900
Subject: kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig

Staring v4.18, Kconfig evaluates compiler capabilities, and hides CONFIG
options your compiler does not support. This works well if you configure
and build the kernel on the same host machine.

It is inconvenient if you prepare the .config that is carried to a
different build environment (typically this happens when you package
the kernel for distros) because using a different compiler potentially
produces different CONFIG options than the real build environment.
So, you probably want to make as many options visible as possible.
In other words, you need to create a super-set of CONFIG options that
cover any build environment. If some of the CONFIG options turned out
to be unsupported on the build machine, they are automatically disabled
by the nature of Kconfig.

However, it is not feasible to get a full-featured compiler for every
arch.

This issue was discussed here:

  https://lkml.org/lkml/2019/12/9/620

Other than distros, savedefconfig is also a problem. Some arch sub-systems
periodically resync defconfig files. If you use a less-capable compiler
for savedefconfig, options that do not meet 'depends on $(cc-option,...)'
will be forcibly disabled. So, 'make defconfig && make savedefconfig'
may silently change the behavior.

This commit adds a set of dummy toolchains that pretend to support any
feature.

Most of compiler features are tested by cc-option, which simply checks
the exit code of $(CC). The dummy tools are shell scripts that always
exit with 0. So, $(cc-option, ...) is evaluated as 'y'.

There are more complicated checks such as:

  scripts/gcc-x86_{32,64}-has-stack-protector.sh
  scripts/gcc-plugin.sh
  scripts/tools-support-relr.sh

scripts/dummy-tools/gcc passes all checks.

From the top directory of the source tree, you can do:

   $ make CROSS_COMPILE=scripts/dummy-tools/ oldconfig

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Tested-by: Jeremy Cline <jcline@redhat.com>
---
 scripts/dummy-tools/gcc     | 91 +++++++++++++++++++++++++++++++++++++++++++++
 scripts/dummy-tools/ld      | 30 +++++++++++++++
 scripts/dummy-tools/nm      |  1 +
 scripts/dummy-tools/objcopy |  1 +
 4 files changed, 123 insertions(+)
 create mode 100755 scripts/dummy-tools/gcc
 create mode 100755 scripts/dummy-tools/ld
 create mode 120000 scripts/dummy-tools/nm
 create mode 120000 scripts/dummy-tools/objcopy

(limited to 'scripts')

diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
new file mode 100755
index 000000000000..33487e99d83e
--- /dev/null
+++ b/scripts/dummy-tools/gcc
@@ -0,0 +1,91 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Staring v4.18, Kconfig evaluates compiler capabilities, and hides CONFIG
+# options your compiler does not support. This works well if you configure and
+# build the kernel on the same host machine.
+#
+# It is inconvenient if you prepare the .config that is carried to a different
+# build environment (typically this happens when you package the kernel for
+# distros) because using a different compiler potentially produces different
+# CONFIG options than the real build environment. So, you probably want to make
+# as many options visible as possible. In other words, you need to create a
+# super-set of CONFIG options that cover any build environment. If some of the
+# CONFIG options turned out to be unsupported on the build machine, they are
+# automatically disabled by the nature of Kconfig.
+#
+# However, it is not feasible to get a full-featured compiler for every arch.
+# Hence these dummy toolchains to make all compiler tests pass.
+#
+# Usage:
+#
+# From the top directory of the source tree, run
+#
+#   $ make CROSS_COMPILE=scripts/dummy-tools/ oldconfig
+#
+# Most of compiler features are tested by cc-option, which simply checks the
+# exit code of $(CC). This script does nothing and just exits with 0 in most
+# cases. So, $(cc-option, ...) is evaluated as 'y'.
+#
+# This scripts caters to more checks; handle --version and pre-process __GNUC__
+# etc. to pretend to be GCC, and also do right things to satisfy some scripts.
+
+# Check if the first parameter appears in the rest. Succeeds if found.
+# This helper is useful if a particular option was passed to this script.
+# Typically used like this:
+#   arg_contain <word-you-are-searching-for> "$@"
+arg_contain ()
+{
+	search="$1"
+	shift
+
+	while [ $# -gt 0 ]
+	do
+		if [ "$search" = "$1" ]; then
+			return 0
+		fi
+		shift
+	done
+
+	return 1
+}
+
+# To set CONFIG_CC_IS_GCC=y
+if arg_contain --version "$@"; then
+	echo "gcc (scripts/dummy-tools/gcc)"
+	exit 0
+fi
+
+if arg_contain -E "$@"; then
+	# For scripts/gcc-version.sh; This emulates GCC 20.0.0
+	if arg_contain - "$@"; then
+		sed 's/^__GNUC__$/20/; s/^__GNUC_MINOR__$/0/; s/^__GNUC_PATCHLEVEL__$/0/'
+		exit 0
+	else
+		echo "no input files" >&2
+		exit 1
+	fi
+fi
+
+if arg_contain -S "$@"; then
+	# For scripts/gcc-x86-*-has-stack-protector.sh
+	if arg_contain -fstack-protector "$@"; then
+		echo "%gs"
+		exit 0
+	fi
+fi
+
+# For scripts/gcc-plugin.sh
+if arg_contain -print-file-name=plugin "$@"; then
+	plugin_dir=$(mktemp -d)
+
+	sed -n 's/.*#include "\(.*\)"/\1/p' $(dirname $0)/../gcc-plugins/gcc-common.h |
+	while read header
+	do
+		mkdir -p $plugin_dir/include/$(dirname $header)
+		touch $plugin_dir/include/$header
+	done
+
+	echo $plugin_dir
+	exit 0
+fi
diff --git a/scripts/dummy-tools/ld b/scripts/dummy-tools/ld
new file mode 100755
index 000000000000..f68233050405
--- /dev/null
+++ b/scripts/dummy-tools/ld
@@ -0,0 +1,30 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-only
+
+# Dummy script that always succeeds.
+
+# Check if the first parameter appears in the rest. Succeeds if found.
+# This helper is useful if a particular option was passed to this script.
+# Typically used like this:
+#   arg_contain <word-you-are-searching-for> "$@"
+arg_contain ()
+{
+	search="$1"
+	shift
+
+	while [ $# -gt 0 ]
+	do
+		if [ "$search" = "$1" ]; then
+			return 0
+		fi
+		shift
+	done
+
+	return 1
+}
+
+if arg_contain --version "$@" || arg_contain -v "$@"; then
+	progname=$(basename $0)
+	echo "GNU $progname (scripts/dummy-tools/$progname) 2.50"
+	exit 0
+fi
diff --git a/scripts/dummy-tools/nm b/scripts/dummy-tools/nm
new file mode 120000
index 000000000000..c0648b38dd42
--- /dev/null
+++ b/scripts/dummy-tools/nm
@@ -0,0 +1 @@
+ld
\ No newline at end of file
diff --git a/scripts/dummy-tools/objcopy b/scripts/dummy-tools/objcopy
new file mode 120000
index 000000000000..c0648b38dd42
--- /dev/null
+++ b/scripts/dummy-tools/objcopy
@@ -0,0 +1 @@
+ld
\ No newline at end of file
-- 
cgit v1.2.3