Merge tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada: - Add -s option (strict mode) to merge_config.sh to make it fail when any symbol is redefined. - Show a warning if a different compiler is used for building external modules. - Infer --target from ARCH for CC=clang to let you cross-compile the kernel without CROSS_COMPILE. - Make the integrated assembler default (LLVM_IAS=1) for CC=clang. - Add <linux/stdarg.h> to the kernel source instead of borrowing <stdarg.h> from the compiler. - Add Nick Desaulniers as a Kbuild reviewer. - Drop stale cc-option tests. - Fix the combination of CONFIG_TRIM_UNUSED_KSYMS and CONFIG_LTO_CLANG to handle symbols in inline assembly. - Show a warning if 'FORCE' is missing for if_changed rules. - Various cleanups * tag 'kbuild-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits) kbuild: redo fake deps at include/ksym/*.h kbuild: clean up objtool_args slightly modpost: get the *.mod file path more simply checkkconfigsymbols.py: Fix the '--ignore' option kbuild: merge vmlinux_link() between ARCH=um and other architectures kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh kbuild: merge vmlinux_link() between the ordinary link and Clang LTO kbuild: remove stale *.symversions kbuild: remove unused quiet_cmd_update_lto_symversions gen_compile_commands: extract compiler command from a series of commands x86: remove cc-option-yn test for -mtune= arc: replace cc-option-yn uses with cc-option s390: replace cc-option-yn uses with cc-option ia64: move core-y in arch/ia64/Makefile to arch/ia64/Kbuild sparc: move the install rule to arch/sparc/Makefile security: remove unneeded subdir-$(CONFIG_...) kbuild: sh: remove unused install script kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y kbuild: Switch to 'f' variants of integrated assembler flag kbuild: Shuffle blank line to improve comment meaning ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2021-09-04 01:33:47 +0300
committer: Linus Torvalds <torvalds@linux-foundation.org> 2021-09-04 01:33:47 +0300
commit: b250e6d141ce4f0d0ada60e4b5db577050e5feb0 (patch)
tree: 682fd38e7efab61cc0963fa9e3137cdba2106111
parent: 4e71add02821bdd204dd29c35e66baecc9b6a235 (diff)
parent: bc7cd2dd1f8e5889cc68b69984033ac5bef6ba61 (diff)
download: linux-b250e6d141ce4f0d0ada60e4b5db577050e5feb0.tar.xz
101 files changed, 305 insertions, 349 deletions
diff --git a/Documentation/kbuild/llvm.rst b/Documentation/kbuild/llvm.rst
index b18401d2ba82..e87ed5479963 100644
--- a/Documentation/kbuild/llvm.rst
+++ b/Documentation/kbuild/llvm.rst
@@ -38,7 +38,7 @@ Cross Compiling
 A single Clang compiler binary will typically contain all supported backends,
 which can help simplify cross compiling. ::
 
-	ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make CC=clang
+	make ARCH=arm64 CC=clang CROSS_COMPILE=aarch64-linux-gnu-
 
 ``CROSS_COMPILE`` is not used to prefix the Clang compiler binary, instead
 ``CROSS_COMPILE`` is used to set a command line flag: ``--target=<triple>``. For
@@ -60,8 +60,27 @@ They can be enabled individually. The full list of the parameters: ::
 	  OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump READELF=llvm-readelf \
 	  HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar HOSTLD=ld.lld
 
-Currently, the integrated assembler is disabled by default. You can pass
-``LLVM_IAS=1`` to enable it.
+The integrated assembler is enabled by default. You can pass ``LLVM_IAS=0`` to
+disable it.
+
+Omitting CROSS_COMPILE
+----------------------
+
+As explained above, ``CROSS_COMPILE`` is used to set ``--target=<triple>``.
+
+If ``CROSS_COMPILE`` is not specified, the ``--target=<triple>`` is inferred
+from ``ARCH``.
+
+That means if you use only LLVM tools, ``CROSS_COMPILE`` becomes unnecessary.
+
+For example, to cross-compile the arm64 kernel::
+
+	make ARCH=arm64 LLVM=1
+
+If ``LLVM_IAS=0`` is specified, ``CROSS_COMPILE`` is also used to derive
+``--prefix=<path>`` to search for the GNU assembler and linker. ::
+
+	make ARCH=arm64 LLVM=1 LLVM_IAS=0 CROSS_COMPILE=aarch64-linux-gnu-
 
 Supported Architectures
 -----------------------
diff --git a/MAINTAINERS b/MAINTAINERS
index fa87db67a249..5ffe43730e43 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4532,6 +4532,7 @@ B:	https://github.com/ClangBuiltLinux/linux/issues
 C:	irc://irc.libera.chat/clangbuiltlinux
 F:	Documentation/kbuild/llvm.rst
 F:	include/linux/compiler-clang.h
+F:	scripts/Makefile.clang
 F:	scripts/clang-tools/
 K:	\b(?i:clang|llvm)\b
 
@@ -10116,6 +10117,7 @@ F:	fs/autofs/
 KERNEL BUILD + files below scripts/ (unless maintained elsewhere)
 M:	Masahiro Yamada <masahiroy@kernel.org>
 M:	Michal Marek <michal.lkml@markovi.net>
+R:	Nick Desaulniers <ndesaulniers@google.com>
 L:	linux-kbuild@vger.kernel.org
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
diff --git a/Makefile b/Makefile
index ec9e8a0fe298..6bc1c5b17a62 100644
--- a/Makefile
+++ b/Makefile
@@ -191,10 +191,9 @@ endif
 ifneq ($(abs_srctree),$(abs_objtree))
 # Look for make include files relative to root of kernel src
 #
-# This does not become effective immediately because MAKEFLAGS is re-parsed
-# once after the Makefile is read. We need to invoke sub-make.
+# --included-dir is added for backward compatibility, but you should not rely on
+# it. Please add $(srctree)/ prefix to include Makefiles in the source tree.
 MAKEFLAGS += --include-dir=$(abs_srctree)
-need-sub-make := 1
 endif
 
 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
@@ -587,23 +586,10 @@ endif
 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
-CC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
+CC_VERSION_TEXT = $(subst $(pound),,$(shell LC_ALL=C $(CC) --version 2>/dev/null | head -n 1))
 
 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
-ifneq ($(CROSS_COMPILE),)
-CLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
-endif
-ifeq ($(LLVM_IAS),1)
-CLANG_FLAGS	+= -integrated-as
-else
-CLANG_FLAGS	+= -no-integrated-as
-GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
-CLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
-endif
-CLANG_FLAGS	+= -Werror=unknown-warning-option
-KBUILD_CFLAGS	+= $(CLANG_FLAGS)
-KBUILD_AFLAGS	+= $(CLANG_FLAGS)
-export CLANG_FLAGS
+include $(srctree)/scripts/Makefile.clang
 endif
 
 # Include this also for config targets because some architectures need
@@ -688,9 +674,10 @@ endif # KBUILD_EXTMOD
 # Defaults to vmlinux, but the arch makefile usually adds further targets
 all: vmlinux
 
-CFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage \
-	$(call cc-option,-fno-tree-loop-im) \
-	$(call cc-disable-warning,maybe-uninitialized,)
+CFLAGS_GCOV	:= -fprofile-arcs -ftest-coverage
+ifdef CONFIG_CC_IS_GCC
+CFLAGS_GCOV	+= -fno-tree-loop-im
+endif
 export CFLAGS_GCOV
 
 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
@@ -698,12 +685,14 @@ ifdef CONFIG_FUNCTION_TRACER
   CC_FLAGS_FTRACE := -pg
 endif
 
-RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
-RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
-RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
-RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
-RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
-RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
+ifdef CONFIG_CC_IS_GCC
+RETPOLINE_CFLAGS	:= $(call cc-option,-mindirect-branch=thunk-extern -mindirect-branch-register)
+RETPOLINE_VDSO_CFLAGS	:= $(call cc-option,-mindirect-branch=thunk-inline -mindirect-branch-register)
+endif
+ifdef CONFIG_CC_IS_CLANG
+RETPOLINE_CFLAGS	:= -mretpoline-external-thunk
+RETPOLINE_VDSO_CFLAGS	:= -mretpoline
+endif
 export RETPOLINE_CFLAGS
 export RETPOLINE_VDSO_CFLAGS
 
@@ -756,7 +745,7 @@ include/config/auto.conf:
 endif # may-sync-config
 endif # need-config
 
-KBUILD_CFLAGS	+= $(call cc-option,-fno-delete-null-pointer-checks,)
+KBUILD_CFLAGS	+= -fno-delete-null-pointer-checks
 KBUILD_CFLAGS	+= $(call cc-disable-warning,frame-address,)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, format-truncation)
 KBUILD_CFLAGS	+= $(call cc-disable-warning, format-overflow)
@@ -771,17 +760,19 @@ KBUILD_CFLAGS += -Os
 endif
 
 # Tell gcc to never replace conditional load with a non-conditional one
+ifdef CONFIG_CC_IS_GCC
+# gcc-10 renamed --param=allow-store-data-races=0 to
+# -fno-allow-store-data-races.
 KBUILD_CFLAGS	+= $(call cc-option,--param=allow-store-data-races=0)
 KBUILD_CFLAGS	+= $(call cc-option,-fno-allow-store-data-races)
+endif
 
 ifdef CONFIG_READABLE_ASM
 # Disable optimizations that make assembler listings hard to read.
 # reorder blocks reorders the control in the function
 # ipa clone creates specialized cloned functions
 # partial inlining inlines only parts of functions
-KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
-                 $(call cc-option,-fno-ipa-cp-clone,) \
-                 $(call cc-option,-fno-partial-inlining)
+KBUILD_CFLAGS += -fno-reorder-blocks -fno-ipa-cp-clone -fno-partial-inlining
 endif
 
 ifneq ($(CONFIG_FRAME_WARN),0)
@@ -796,7 +787,7 @@ KBUILD_CFLAGS += $(stackp-flags-y)
 
 ifdef CONFIG_CC_IS_CLANG
 KBUILD_CPPFLAGS += -Qunused-arguments
-KBUILD_CFLAGS += -Wno-format-invalid-specifier
+# The kernel builds with '-std=gnu89' so use of GNU extensions is acceptable.
 KBUILD_CFLAGS += -Wno-gnu
 # 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.
@@ -813,8 +804,8 @@ endif
 # These warnings generated too much noise in a regular build.
 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
-
 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
+
 ifdef CONFIG_FRAME_POINTER
 KBUILD_CFLAGS	+= -fno-omit-frame-pointer -fno-optimize-sibling-calls
 else
@@ -867,7 +858,7 @@ else
 DEBUG_CFLAGS	+= -g
 endif
 
-ifneq ($(LLVM_IAS),1)
+ifndef CONFIG_AS_IS_LLVM
 KBUILD_AFLAGS	+= -Wa,-gdwarf-2
 endif
 
@@ -878,8 +869,10 @@ DEBUG_CFLAGS	+= -gdwarf-$(dwarf-version-y)
 endif
 
 ifdef CONFIG_DEBUG_INFO_REDUCED
-DEBUG_CFLAGS	+= $(call cc-option, -femit-struct-debug-baseonly) \
-		   $(call cc-option,-fno-var-tracking)
+DEBUG_CFLAGS	+= -fno-var-tracking
+ifdef CONFIG_CC_IS_GCC
+DEBUG_CFLAGS	+= -femit-struct-debug-baseonly
+endif
 endif
 
 ifdef CONFIG_DEBUG_INFO_COMPRESSED
@@ -913,6 +906,7 @@ ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
   endif
 endif
 ifdef CONFIG_HAVE_FENTRY
+  # s390-linux-gnu-gcc did not support -mfentry until gcc-9.
   ifeq ($(call cc-option-yn, -mfentry),y)
     CC_FLAGS_FTRACE	+= -mfentry
     CC_FLAGS_USING	+= -DCC_USING_FENTRY
@@ -925,7 +919,7 @@ endif
 
 # We trigger additional mismatches with less inlining
 ifdef CONFIG_DEBUG_SECTION_MISMATCH
-KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
+KBUILD_CFLAGS += -fno-inline-functions-called-once
 endif
 
 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
@@ -1004,14 +998,16 @@ KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
 
 # We'll want to enable this eventually, but it's not going away for 5.7 at least
 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
-KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
+KBUILD_CFLAGS += -Wno-array-bounds
 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
 
 # Another good warning that we'll want to enable eventually
 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
 
 # Enabled with W=2, disabled by default as noisy
-KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
+ifdef CONFIG_CC_IS_GCC
+KBUILD_CFLAGS += -Wno-maybe-uninitialized
+endif
 
 # disable invalid "can't wrap" optimizations for signed / pointers
 KBUILD_CFLAGS	+= -fno-strict-overflow
@@ -1020,7 +1016,9 @@ KBUILD_CFLAGS	+= -fno-strict-overflow
 KBUILD_CFLAGS  += -fno-stack-check
 
 # conserve stack if available
-KBUILD_CFLAGS   += $(call cc-option,-fconserve-stack)
+ifdef CONFIG_CC_IS_GCC
+KBUILD_CFLAGS   += -fconserve-stack
+endif
 
 # Prohibit date/time macros, which would make the build non-deterministic
 KBUILD_CFLAGS   += -Werror=date-time
@@ -1750,6 +1748,16 @@ clean-dirs := $(KBUILD_EXTMOD)
 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
 	$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
 
+PHONY += prepare
+# now expand this into a simple variable to reduce the cost of shell evaluations
+prepare: CC_VERSION_TEXT := $(CC_VERSION_TEXT)
+prepare:
+	@if [ "$(CC_VERSION_TEXT)" != $(CONFIG_CC_VERSION_TEXT) ]; then \
+		echo >&2 "warning: the compiler differs from the one used to build the kernel"; \
+		echo >&2 "  The kernel was built by: "$(CONFIG_CC_VERSION_TEXT); \
+		echo >&2 "  You are using:           $(CC_VERSION_TEXT)"; \
+	fi
+
 PHONY += help
 help:
 	@echo  '  Building external modules.'
@@ -1761,7 +1769,7 @@ help:
 	@echo  ''
 
 # no-op for external module builds
-PHONY += prepare modules_prepare
+PHONY += modules_prepare
 
 endif # KBUILD_EXTMOD
 
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index c0d87ac2e221..8782a03f24a8 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -18,8 +18,7 @@ ifeq ($(CONFIG_ARC_TUNE_MCPU),"")
 cflags-y				+= $(tune-mcpu-def-y)
 else
 tune-mcpu				:= $(shell echo $(CONFIG_ARC_TUNE_MCPU))
-tune-mcpu-ok 				:= $(call cc-option-yn, $(tune-mcpu))
-ifeq ($(tune-mcpu-ok),y)
+ifneq ($(call cc-option,$(tune-mcpu)),)
 cflags-y				+= $(tune-mcpu)
 else
 # The flag provided by 'CONFIG_ARC_TUNE_MCPU' option isn't known by this compiler
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index fc9e8b37eaa8..bb5ad8a6a4c3 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -5,8 +5,6 @@
  *  Copyright (C) 1996-2000 Russell King - Converted to ARM.
  *  Original Copyright (C) 1995  Linus Torvalds
  */
-#include <stdarg.h>
-
 #include <linux/export.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
diff --git a/arch/arm/mach-bcm/bcm_kona_smc.c b/arch/arm/mach-bcm/bcm_kona_smc.c
index 43a16f922b53..43829e49ad93 100644
--- a/arch/arm/mach-bcm/bcm_kona_smc.c
+++ b/arch/arm/mach-bcm/bcm_kona_smc.c
@@ -10,8 +10,6 @@
  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */
-
-#include <stdarg.h>
 #include <linux/smp.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 2bd270cd603e..19100fe8f7e4 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -6,9 +6,6 @@
  * Copyright (C) 1996-2000 Russell King - Converted to ARM.
  * Copyright (C) 2012 ARM Ltd.
  */
-
-#include <stdarg.h>
-
 #include <linux/compat.h>
 #include <linux/efi.h>
 #include <linux/elf.h>
diff --git a/arch/ia64/Kbuild b/arch/ia64/Kbuild
index a4e40e534e6a..e77cc76d228c 100644
--- a/arch/ia64/Kbuild
+++ b/arch/ia64/Kbuild
@@ -1 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0-only
+obj-y				+= kernel/ mm/
+obj-$(CONFIG_IA64_SGI_UV)	+= uv/
diff --git a/arch/ia64/Makefile b/arch/ia64/Makefile
index 467b7e7f967c..7e548c654a29 100644
--- a/arch/ia64/Makefile
+++ b/arch/ia64/Makefile
@@ -47,8 +47,6 @@ KBUILD_CFLAGS += $(cflags-y)
 head-y := arch/ia64/kernel/head.o
 
 libs-y				+= arch/ia64/lib/
-core-y				+= arch/ia64/kernel/ arch/ia64/mm/
-core-$(CONFIG_IA64_SGI_UV)	+= arch/ia64/uv/
 
 drivers-y			+= arch/ia64/pci/ arch/ia64/hp/common/
 
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 1fb97579b6b4..ea3cd080a1c7 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -254,7 +254,7 @@ endif
 #
 # Board-dependent options and extra files
 #
-include arch/mips/Kbuild.platforms
+include $(srctree)/arch/mips/Kbuild.platforms
 
 ifdef CONFIG_PHYSICAL_START
 load-y					= $(CONFIG_PHYSICAL_START)
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index eb62429681fc..b0698d9ce14f 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -14,8 +14,6 @@
  */
 
 #define __KERNEL_SYSCALLS__
-#include <stdarg.h>
-
 #include <linux/errno.h>
 #include <linux/sched.h>
 #include <linux/sched/debug.h>
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 665b70086685..7034227dbdf3 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -51,7 +51,7 @@
  *					prumpf	991016	
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include <linux/delay.h>
 #include <linux/init.h>
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index 184ec3c1eae4..38ec4ae81239 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -17,9 +17,6 @@
  *    Copyright (C) 2001-2014 Helge Deller <deller@gmx.de>
  *    Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org>
  */
-
-#include <stdarg.h>
-
 #include <linux/elf.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 44b2cdc0aae3..2e67588f6f6e 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -11,7 +11,6 @@
 
 #undef DEBUG
 
-#include <stdarg.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/init.h>
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 95a42d49e291..18b04b08b983 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -14,7 +14,7 @@
 /* we cannot use FORTIFY as it brings in new symbols */
 #define __NO_FORTIFY
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/init.h>
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 99f2cce635fb..ff80bbad22a5 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -7,7 +7,7 @@
  * Copyright (C) 2001 IBM.
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/spinlock.h>
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 01595e8cafe7..b1544b2f6321 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -5,7 +5,7 @@
  * c 2001 PPC 64 Team, IBM Corp
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/console.h>
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index bc74afdbf31e..dcfbd2a87d41 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -41,7 +41,7 @@ endif
 ifeq ($(CONFIG_LD_IS_LLD),y)
 	KBUILD_CFLAGS += -mno-relax
 	KBUILD_AFLAGS += -mno-relax
-ifneq ($(LLVM_IAS),1)
+ifndef CONFIG_AS_IS_LLVM
 	KBUILD_CFLAGS += -Wa,-mno-relax
 	KBUILD_AFLAGS += -Wa,-mno-relax
 endif
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 17dc4f1ac4fa..a3cf33ad009f 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -70,7 +70,7 @@ cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
 #
 cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
 
-ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
+ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),)
 cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
 aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
 endif
@@ -78,22 +78,22 @@ endif
 KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
 KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
 
-ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
+ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
 cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
-ifneq ($(call cc-option-yn,-mstack-size=8192),y)
+ifeq ($(call cc-option,-mstack-size=8192),)
 cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
 endif
 endif
 
 ifdef CONFIG_WARN_DYNAMIC_STACK
-  ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
+  ifneq ($(call cc-option,-mwarn-dynamicstack),)
     KBUILD_CFLAGS += -mwarn-dynamicstack
     KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
   endif
 endif
 
 ifdef CONFIG_EXPOLINE
-  ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
+  ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),)
     CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
     CC_FLAGS_EXPOLINE += -mfunction-return=thunk
     CC_FLAGS_EXPOLINE += -mindirect-branch-table
@@ -104,10 +104,10 @@ ifdef CONFIG_EXPOLINE
 endif
 
 ifdef CONFIG_FUNCTION_TRACER
-  ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
+  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
     # make use of hotpatch feature if the compiler supports it
     cc_hotpatch	:= -mhotpatch=0,3
-    ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
+    ifneq ($(call cc-option,$(cc_hotpatch)),)
       CC_FLAGS_FTRACE := $(cc_hotpatch)
       KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
       KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
diff --git a/arch/s390/boot/pgm_check_info.c b/arch/s390/boot/pgm_check_info.c
index 209f6ae5a197..75bcbfa27941 100644
--- a/arch/s390/boot/pgm_check_info.c
+++ b/arch/s390/boot/pgm_check_info.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/kernel.h>
+#include <linux/stdarg.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
 #include <asm/stacktrace.h>
@@ -8,7 +9,6 @@
 #include <asm/setup.h>
 #include <asm/sclp.h>
 #include <asm/uv.h>
-#include <stdarg.h>
 #include "boot.h"
 
 const char hex_asc[] = "0123456789abcdef";
diff --git a/arch/sh/boot/compressed/install.sh b/arch/sh/boot/compressed/install.sh
deleted file mode 100644
index f9f41818b17e..000000000000
--- a/arch/sh/boot/compressed/install.sh
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/bin/sh
-#
-# arch/sh/boot/install.sh
-#
-# This file is subject to the terms and conditions of the GNU General Public
-# License.  See the file "COPYING" in the main directory of this archive
-# for more details.
-#
-# Copyright (C) 1995 by Linus Torvalds
-#
-# Adapted from code in arch/i386/boot/Makefile by H. Peter Anvin
-# Adapted from code in arch/i386/boot/install.sh by Russell King
-# Adapted from code in arch/arm/boot/install.sh by Stuart Menefy
-#
-# "make install" script for sh architecture
-#
-# Arguments:
-#   $1 - kernel version
-#   $2 - kernel image file
-#   $3 - kernel map file
-#   $4 - default install path (blank if root directory)
-#
-
-# User may have a custom install script
-
-if [ -x /sbin/${INSTALLKERNEL} ]; then
-  exec /sbin/${INSTALLKERNEL} "$@"
-fi
-
-if [ "$2" = "zImage" ]; then
-# Compressed install
-  echo "Installing compressed kernel"
-  if [ -f $4/vmlinuz-$1 ]; then
-    mv $4/vmlinuz-$1 $4/vmlinuz.old
-  fi
-
-  if [ -f $4/System.map-$1 ]; then
-    mv $4/System.map-$1 $4/System.old
-  fi
-
-  cat $2 > $4/vmlinuz-$1
-  cp $3 $4/System.map-$1
-else
-# Normal install
-  echo "Installing normal kernel"
-  if [ -f $4/vmlinux-$1 ]; then
-    mv $4/vmlinux-$1 $4/vmlinux.old
-  fi
-
-  if [ -f $4/System.map ]; then
-    mv $4/System.map $4/System.old
-  fi
-
-  cat $2 > $4/vmlinux-$1
-  cp $3 $4/System.map
-fi
diff --git a/arch/sparc/Makefile b/arch/sparc/Makefile
index 4e65245bc755..24fb5a99f439 100644
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -72,7 +72,8 @@ image zImage uImage tftpboot.img vmlinux.aout: vmlinux
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
 install:
-	$(Q)$(MAKE) $(build)=$(boot) $@
+	sh $(srctree)/$(boot)/install.sh $(KERNELRELEASE) $(KBUILD_IMAGE) \
+		System.map "$(INSTALL_PATH)"
 
 archclean:
 	$(Q)$(MAKE) $(clean)=$(boot)
diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
index 380e2b018992..849236d4eca4 100644
--- a/arch/sparc/boot/Makefile
+++ b/arch/sparc/boot/Makefile
@@ -70,7 +70,3 @@ $(obj)/image: vmlinux FORCE
 $(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback System.map $(ROOT_IMG) FORCE
 	$(call if_changed,elftoaout)
 	$(call if_changed,piggy)
-
-install:
-	sh $(srctree)/$(src)/install.sh $(KERNELRELEASE) $(obj)/zImage \
-		System.map "$(INSTALL_PATH)"
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index 93983d6d431d..bbbe0cfef746 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -8,9 +8,6 @@
 /*
  * This file handles the architecture-dependent parts of process handling..
  */
-
-#include <stdarg.h>
-
 #include <linux/elfcore.h>
 #include <linux/errno.h>
 #include <linux/module.h>
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index 547b06b49ce3..093849bfda50 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -9,9 +9,6 @@
 /*
  * This file handles the architecture-dependent parts of process handling..
  */
-
-#include <stdarg.h>
-
 #include <linux/errno.h>
 #include <linux/export.h>
 #include <linux/sched.h>
diff --git a/arch/um/Makefile b/arch/um/Makefile
index 12a7acef0357..f2fe63bfd819 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -41,8 +41,8 @@ endif
 
 HOST_DIR := arch/$(HEADER_ARCH)
 
-include $(ARCH_DIR)/Makefile-skas
-include $(HOST_DIR)/Makefile.um
+include $(srctree)/$(ARCH_DIR)/Makefile-skas
+include $(srctree)/$(HOST_DIR)/Makefile.um
 
 core-y += $(HOST_DIR)/um/
 
@@ -76,7 +76,7 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
 		-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
 
 #This will adjust *FLAGS accordingly to the platform.
-include $(ARCH_DIR)/Makefile-os-$(OS)
+include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 
 KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
 		   -I$(srctree)/$(HOST_DIR)/include/uapi \
diff --git a/arch/um/drivers/rtc_user.c b/arch/um/drivers/rtc_user.c
index 4016bc1d577e..7c3cec4c68cf 100644
--- a/arch/um/drivers/rtc_user.c
+++ b/arch/um/drivers/rtc_user.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2020 Intel Corporation
  * Author: Johannes Berg <johannes@sipsolutions.net>
  */
+#include <stdbool.h>
 #include <os.h>
 #include <errno.h>
 #include <sched.h>
diff --git a/arch/um/drivers/vector_user.c b/arch/um/drivers/vector_user.c
index bae53220ce26..e4ffeb9a1fa4 100644
--- a/arch/um/drivers/vector_user.c
+++ b/arch/um/drivers/vector_user.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  */
 
+#include <stdbool.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <stdarg.h>
diff --git a/arch/um/include/shared/irq_user.h b/arch/um/include/shared/irq_user.h
index 065829f443ae..86a8a573b65c 100644
--- a/arch/um/include/shared/irq_user.h
+++ b/arch/um/include/shared/irq_user.h
@@ -7,7 +7,6 @@
 #define __IRQ_USER_H__
 
 #include <sysdep/ptrace.h>
-#include <stdbool.h>
 
 enum um_irq_type {
 	IRQ_READ,
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index 60b84edc8a68..96d400387c93 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -8,7 +8,6 @@
 #ifndef __OS_H__
 #define __OS_H__
 
-#include <stdarg.h>
 #include <irq_user.h>
 #include <longjmp.h>
 #include <mm_id.h>
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 6de99bb16113..6cf098c23a39 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -67,7 +67,7 @@ int signals_enabled;
 #ifdef UML_CONFIG_UML_TIME_TRAVEL_SUPPORT
 static int signals_blocked;
 #else
-#define signals_blocked false
+#define signals_blocked 0
 #endif
 static unsigned int signals_pending;
 static unsigned int signals_active = 0;
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 07327425d06e..41297ec404bf 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  */
 
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index d82d01490dd3..7488cfbbd2f6 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -73,7 +73,7 @@ ifeq ($(CONFIG_X86_32),y)
         KBUILD_CFLAGS += $(cc_stack_align4)
 
         # CPU-specific tuning. Anything which can be shared with UML should go here.
-        include arch/x86/Makefile_32.cpu
+        include $(srctree)/arch/x86/Makefile_32.cpu
         KBUILD_CFLAGS += $(cflags-y)
 
         # temporary until string.h is fixed
diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu
index cd3056759880..e7355f8b51c2 100644
--- a/arch/x86/Makefile_32.cpu
+++ b/arch/x86/Makefile_32.cpu
@@ -2,13 +2,7 @@
 # CPU tuning section - shared with UML.
 # Must change only cflags-y (or [yn]), not CFLAGS! That makes a difference for UML.
 
-#-mtune exists since gcc 3.4
-HAS_MTUNE	:= $(call cc-option-yn, -mtune=i386)
-ifeq ($(HAS_MTUNE),y)
 tune		= $(call cc-option,-mtune=$(1),$(2))
-else
-tune		= $(call cc-option,-mcpu=$(1),$(2))
-endif
 
 cflags-$(CONFIG_M486SX)		+= -march=i486
 cflags-$(CONFIG_M486)		+= -march=i486
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index ca866f1cca2e..34c9dbb6a47d 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -18,7 +18,7 @@
 
 #ifndef __ASSEMBLY__
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/types.h>
 #include <linux/edd.h>
 #include <asm/setup.h>
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 05c4abc2fdfd..a2dddcc189f6 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -131,7 +131,7 @@ $(obj)/%-x32.o: $(obj)/%.o FORCE
 targets += vdsox32.lds $(vobjx32s-y)
 
 $(obj)/%.so: OBJCOPYFLAGS := -S --remove-section __ex_table
-$(obj)/%.so: $(obj)/%.so.dbg
+$(obj)/%.so: $(obj)/%.so.dbg FORCE
 	$(call if_changed,objcopy)
 
 $(obj)/vdsox32.so.dbg: $(obj)/vdsox32.lds $(vobjx32s) FORCE
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 125b22205d38..33eba3df4dd9 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -8,7 +8,6 @@
 
 #define pr_fmt(fmt) "xen-blkback: " fmt
 
-#include <stdarg.h>
 #include <linux/module.h>
 #include <linux/kthread.h>
 #include <xen/events.h>
diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index ae87dded989d..d489bdc645fe 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -7,7 +7,7 @@
  * Copyright 2011 Intel Corporation; author Matt Fleming
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include <linux/ctype.h>
 #include <linux/efi.h>
diff --git a/drivers/firmware/efi/libstub/vsprintf.c b/drivers/firmware/efi/libstub/vsprintf.c
index 1088e288c04d..71c71c222346 100644
--- a/drivers/firmware/efi/libstub/vsprintf.c
+++ b/drivers/firmware/efi/libstub/vsprintf.c
@@ -10,7 +10,7 @@
  * Oh, it's a waste of space, but oh-so-yummy for debugging.
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include <linux/compiler.h>
 #include <linux/ctype.h>
diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c
index a612ba6dc389..ab6bc5d79012 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c
@@ -28,9 +28,9 @@
  */
 
 #include <linux/delay.h>
+#include <linux/stdarg.h>
 
 #include "dm_services.h"
-#include <stdarg.h>
 
 #include "dc.h"
 #include "dc_dmub_srv.h"
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index 7b684e7f60df..7efe9ba8706e 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -39,7 +39,6 @@
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/delay.h>
-#include <stdarg.h>
 
 #include "atomfirmware.h"
 
diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c
index 111b932cf2a9..f783d4963d4b 100644
--- a/drivers/gpu/drm/drm_print.c
+++ b/drivers/gpu/drm/drm_print.c
@@ -25,7 +25,7 @@
 
 #define DEBUG /* for pr_debug() */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include <linux/io.h>
 #include <linux/moduleparam.h>
diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
index c22b07f68670..4c619307612c 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
@@ -24,7 +24,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/kthread.h>
 #include <linux/devcoredump.h>
-#include <stdarg.h>
 #include "msm_kms.h"
 
 #define MSM_DISP_SNAPSHOT_MAX_BLKS		10
diff --git a/drivers/isdn/capi/capiutil.c b/drivers/isdn/capi/capiutil.c
index f26bf3c66d7e..d7ae42edc4a8 100644
--- a/drivers/isdn/capi/capiutil.c
+++ b/drivers/isdn/capi/capiutil.c
@@ -379,7 +379,7 @@ static char *pnames[] =
 	/*2f */ "Useruserdata"
 };
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 /*-------------------------------------------------------*/
 static _cdebbuf *bufprint(_cdebbuf *cdb, char *fmt, ...)
diff --git a/drivers/macintosh/macio-adb.c b/drivers/macintosh/macio-adb.c
index d4759db002c6..dc634c2932fd 100644
--- a/drivers/macintosh/macio-adb.c
+++ b/drivers/macintosh/macio-adb.c
@@ -2,7 +2,6 @@
 /*
  * Driver for the ADB controller in the Mac I/O (Hydra) chip.
  */
-#include <stdarg.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
diff --git a/drivers/macintosh/via-cuda.c b/drivers/macintosh/via-cuda.c
index 3581abfb0c6a..cd267392289c 100644
--- a/drivers/macintosh/via-cuda.c
+++ b/drivers/macintosh/via-cuda.c
@@ -9,7 +9,7 @@
  *
  * Copyright (C) 1996 Paul Mackerras.
  */
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
diff --git a/drivers/macintosh/via-macii.c b/drivers/macintosh/via-macii.c
index 060e03f2264b..db9270da5b8e 100644
--- a/drivers/macintosh/via-macii.c
+++ b/drivers/macintosh/via-macii.c
@@ -23,8 +23,6 @@
  * Apple's "ADB Analyzer" bus sniffer is invaluable:
  *   ftp://ftp.apple.com/developer/Tool_Chest/Devices_-_Hardware/Apple_Desktop_Bus/
  */
-
-#include <stdarg.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c
index 4bdd4c45e7a7..4b98bc26a94b 100644
--- a/drivers/macintosh/via-pmu.c
+++ b/drivers/macintosh/via-pmu.c
@@ -18,7 +18,7 @@
  *    a sleep or a freq. switch
  *
  */
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/mutex.h>
 #include <linux/types.h>
 #include <linux/errno.h>
diff --git a/drivers/net/wireless/intersil/orinoco/hermes.c b/drivers/net/wireless/intersil/orinoco/hermes.c
index 6d4b7f64efcf..256946552742 100644
--- a/drivers/net/wireless/intersil/orinoco/hermes.c
+++ b/drivers/net/wireless/intersil/orinoco/hermes.c
@@ -79,7 +79,6 @@
 
 #undef HERMES_DEBUG
 #ifdef HERMES_DEBUG
-#include <stdarg.h>
 
 #define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff)
 
diff --git a/drivers/net/wwan/iosm/iosm_ipc_imem.h b/drivers/net/wwan/iosm/iosm_ipc_imem.h
index 0d2f10e4cbc8..dc65b0712261 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_imem.h
+++ b/drivers/net/wwan/iosm/iosm_ipc_imem.h
@@ -7,7 +7,6 @@
 #define IOSM_IPC_IMEM_H
 
 #include <linux/skbuff.h>
-#include <stdbool.h>
 
 #include "iosm_ipc_mmio.h"
 #include "iosm_ipc_pcie.h"
diff --git a/drivers/pinctrl/aspeed/pinmux-aspeed.h b/drivers/pinctrl/aspeed/pinmux-aspeed.h
index b69ba6b360a2..4d7548686f39 100644
--- a/drivers/pinctrl/aspeed/pinmux-aspeed.h
+++ b/drivers/pinctrl/aspeed/pinmux-aspeed.h
@@ -5,7 +5,6 @@
 #define ASPEED_PINMUX_H
 
 #include <linux/regmap.h>
-#include <stdbool.h>
 
 /*
  * The ASPEED SoCs provide typically more than 200 pins for GPIO and other
diff --git a/drivers/scsi/elx/efct/efct_driver.h b/drivers/scsi/elx/efct/efct_driver.h
index dab8eac4f243..0e3c931db7c2 100644
--- a/drivers/scsi/elx/efct/efct_driver.h
+++ b/drivers/scsi/elx/efct/efct_driver.h
@@ -10,7 +10,6 @@
 /***************************************************************************
  * OS specific includes
  */
-#include <stdarg.h>
 #include <linux/module.h>
 #include <linux/debugfs.h>
 #include <linux/firmware.h>
diff --git a/drivers/staging/media/atomisp/pci/hive_isp_css_common/host/isp_local.h b/drivers/staging/media/atomisp/pci/hive_isp_css_common/host/isp_local.h
index eceeb5d160ad..4dbec4063b3d 100644
--- a/drivers/staging/media/atomisp/pci/hive_isp_css_common/host/isp_local.h
+++ b/drivers/staging/media/atomisp/pci/hive_isp_css_common/host/isp_local.h
@@ -16,8 +16,6 @@
 #ifndef __ISP_LOCAL_H_INCLUDED__
 #define __ISP_LOCAL_H_INCLUDED__
 
-#include <stdbool.h>
-
 #include "isp_global.h"
 
 #include <isp2400_support.h>
diff --git a/drivers/staging/media/atomisp/pci/hive_isp_css_include/print_support.h b/drivers/staging/media/atomisp/pci/hive_isp_css_include/print_support.h
index 540b405cc0f7..a3c7f3de6d17 100644
--- a/drivers/staging/media/atomisp/pci/hive_isp_css_include/print_support.h
+++ b/drivers/staging/media/atomisp/pci/hive_isp_css_include/print_support.h
@@ -16,7 +16,7 @@
 #ifndef __PRINT_SUPPORT_H_INCLUDED__
 #define __PRINT_SUPPORT_H_INCLUDED__
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 extern int (*sh_css_printf)(const char *fmt, va_list args);
 /* depends on host supplied print function in ia_css_init() */
diff --git a/drivers/staging/media/atomisp/pci/ia_css_env.h b/drivers/staging/media/atomisp/pci/ia_css_env.h
index 6b38723b27cd..3b89bbd837a0 100644
--- a/drivers/staging/media/atomisp/pci/ia_css_env.h
+++ b/drivers/staging/media/atomisp/pci/ia_css_env.h
@@ -17,7 +17,7 @@
 #define __IA_CSS_ENV_H
 
 #include <type_support.h>
-#include <stdarg.h> /* va_list */
+#include <linux/stdarg.h> /* va_list */
 #include "ia_css_types.h"
 #include "ia_css_acc_types.h"
 
diff --git a/drivers/staging/media/atomisp/pci/runtime/debug/interface/ia_css_debug.h b/drivers/staging/media/atomisp/pci/runtime/debug/interface/ia_css_debug.h
index 5e6e7447ae00..e37ef4232c55 100644
--- a/drivers/staging/media/atomisp/pci/runtime/debug/interface/ia_css_debug.h
+++ b/drivers/staging/media/atomisp/pci/runtime/debug/interface/ia_css_debug.h
@@ -19,7 +19,7 @@
 /*! \file */
 
 #include <type_support.h>
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include "ia_css_types.h"
 #include "ia_css_binary.h"
 #include "ia_css_frame_public.h"
diff --git a/drivers/staging/media/atomisp/pci/sh_css_internal.h b/drivers/staging/media/atomisp/pci/sh_css_internal.h
index 3c669ec79b68..496faa7297a5 100644
--- a/drivers/staging/media/atomisp/pci/sh_css_internal.h
+++ b/drivers/staging/media/atomisp/pci/sh_css_internal.h
@@ -20,7 +20,7 @@
 #include <math_support.h>
 #include <type_support.h>
 #include <platform_support.h>
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #if !defined(ISP2401)
 #include "input_formatter.h"
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 61ce0d142eea..0c5e565aa8cf 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -33,8 +33,6 @@
 
 #define pr_fmt(fmt) "xen-pvscsi: " fmt
 
-#include <stdarg.h>
-
 #include <linux/module.h>
 #include <linux/utsname.h>
 #include <linux/interrupt.h>
diff --git a/fs/befs/debug.c b/fs/befs/debug.c
index eb7bd6c692c7..02fa66fb82c2 100644
--- a/fs/befs/debug.c
+++ b/fs/befs/debug.c
@@ -14,7 +14,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #ifdef __KERNEL__
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/string.h>
 #include <linux/spinlock.h>
 #include <linux/kernel.h>
diff --git a/fs/reiserfs/prints.c b/fs/reiserfs/prints.c
index 500f2000eb41..30319dc33c18 100644
--- a/fs/reiserfs/prints.c
+++ b/fs/reiserfs/prints.c
@@ -8,7 +8,7 @@
 #include <linux/string.h>
 #include <linux/buffer_head.h>
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 static char error_buf[1024];
 static char fmt_buf[1024];
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index 74028b5a7b0a..00a01471ea05 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -70,7 +70,7 @@
 #include <linux/module.h>
 #include <linux/bitops.h>
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include <linux/uaccess.h>
 
diff --git a/include/acpi/platform/acgcc.h b/include/acpi/platform/acgcc.h
index f6656be81760..fb172a03a753 100644
--- a/include/acpi/platform/acgcc.h
+++ b/include/acpi/platform/acgcc.h
@@ -22,7 +22,7 @@ typedef __builtin_va_list va_list;
 #define va_arg(v, l)            __builtin_va_arg(v, l)
 #define va_copy(d, s)           __builtin_va_copy(d, s)
 #else
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #endif
 #endif
 
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 7d248941ecea..4a93c12543ee 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -5,8 +5,6 @@
 #ifndef __LINUX_FILTER_H__
 #define __LINUX_FILTER_H__
 
-#include <stdarg.h>
-
 #include <linux/atomic.h>
 #include <linux/refcount.h>
 #include <linux/compat.h>
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 1b2f0a7e00d6..2776423a587e 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -2,7 +2,7 @@
 #ifndef _LINUX_KERNEL_H
 #define _LINUX_KERNEL_H
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/align.h>
 #include <linux/limits.h>
 #include <linux/linkage.h>
diff --git a/include/linux/mISDNif.h b/include/linux/mISDNif.h
index a7330eb3ec64..7dd1f01ec4f9 100644
--- a/include/linux/mISDNif.h
+++ b/include/linux/mISDNif.h
@@ -18,7 +18,6 @@
 #ifndef mISDNIF_H
 #define mISDNIF_H
 
-#include <stdarg.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/socket.h>
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 259af4f97f50..85b656f82d75 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -2,7 +2,7 @@
 #ifndef __KERNEL_PRINTK__
 #define __KERNEL_PRINTK__
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/init.h>
 #include <linux/kern_levels.h>
 #include <linux/linkage.h>
diff --git a/include/linux/stdarg.h b/include/linux/stdarg.h
new file mode 100644
index 000000000000..c8dc7f4f390c
--- /dev/null
+++ b/include/linux/stdarg.h
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef _LINUX_STDARG_H
+#define _LINUX_STDARG_H
+
+typedef __builtin_va_list va_list;
+#define va_start(v, l)	__builtin_va_start(v, l)
+#define va_end(v)	__builtin_va_end(v)
+#define va_arg(v, T)	__builtin_va_arg(v, T)
+#define va_copy(d, s)	__builtin_va_copy(d, s)
+
+#endif
diff --git a/include/linux/string.h b/include/linux/string.h
index b48d2d28e0b1..5e96d656be7a 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -6,7 +6,7 @@
 #include <linux/types.h>	/* for size_t */
 #include <linux/stddef.h>	/* for NULL */
 #include <linux/errno.h>	/* for E2BIG */
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <uapi/linux/string.h>
 
 extern char *strndup_user(const char __user *, long);
diff --git a/kernel/debug/kdb/kdb_support.c b/kernel/debug/kdb/kdb_support.c
index 9f50d22d68e6..4f9950678e7b 100644
--- a/kernel/debug/kdb/kdb_support.c
+++ b/kernel/debug/kdb/kdb_support.c
@@ -10,7 +10,6 @@
  * 03/02/13    added new 2.5 kallsyms <xavier.bru@bull.net>
  */
 
-#include <stdarg.h>
 #include <linux/types.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a2ccad6855f8..0f61b1ec385d 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -365,6 +365,7 @@ config STRIP_ASM_SYMS
 config READABLE_ASM
 	bool "Generate readable assembler code"
 	depends on DEBUG_KERNEL
+	depends on CC_IS_GCC
 	help
 	  Disable some compiler optimizations that tend to generate human unreadable
 	  assembler output. This may make the kernel slightly slower, but it helps
@@ -383,6 +384,7 @@ config HEADERS_INSTALL
 
 config DEBUG_SECTION_MISMATCH
 	bool "Enable full Section mismatch analysis"
+	depends on CC_IS_GCC
 	help
 	  The section mismatch analysis checks if there are illegal
 	  references from one section to another section.
diff --git a/lib/debug_info.c b/lib/debug_info.c
index 36daf753293c..cc4723c74af5 100644
--- a/lib/debug_info.c
+++ b/lib/debug_info.c
@@ -5,8 +5,6 @@
  * CONFIG_DEBUG_INFO_REDUCED. Please do not add actual code. However,
  * adding appropriate #includes is fine.
  */
-#include <stdarg.h>
-
 #include <linux/cred.h>
 #include <linux/crypto.h>
 #include <linux/dcache.h>
@@ -22,6 +20,7 @@
 #include <linux/net.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/stdarg.h>
 #include <linux/types.h>
 #include <net/addrconf.h>
 #include <net/sock.h>
diff --git a/lib/kasprintf.c b/lib/kasprintf.c
index bacf7b83ccf0..cd2f5974ed98 100644
--- a/lib/kasprintf.c
+++ b/lib/kasprintf.c
@@ -5,7 +5,7 @@
  *  Copyright (C) 1991, 1992  Linus Torvalds
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/types.h>
diff --git a/lib/kunit/string-stream.h b/lib/kunit/string-stream.h
index 5e94b623454f..43f9508a55b4 100644
--- a/lib/kunit/string-stream.h
+++ b/lib/kunit/string-stream.h
@@ -11,7 +11,7 @@
 
 #include <linux/spinlock.h>
 #include <linux/types.h>
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 struct string_stream_fragment {
 	struct kunit *test;
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 26c83943748a..3bcb7be03f93 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -17,7 +17,7 @@
  * - scnprintf and vscnprintf
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 #include <linux/build_bug.h>
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
diff --git a/mm/kfence/report.c b/mm/kfence/report.c
index 2a319c21c939..4b891dd75650 100644
--- a/mm/kfence/report.c
+++ b/mm/kfence/report.c
@@ -5,7 +5,7 @@
  * Copyright (C) 2020, Google LLC.
  */
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include <linux/kernel.h>
 #include <linux/lockdep.h>
diff --git a/net/batman-adv/log.c b/net/batman-adv/log.c
index f0e5d1429662..7a93a1e94c40 100644
--- a/net/batman-adv/log.c
+++ b/net/batman-adv/log.c
@@ -7,7 +7,7 @@
 #include "log.h"
 #include "main.h"
 
-#include <stdarg.h>
+#include <linux/stdarg.h>
 
 #include "trace.h"
 
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index f247e691562d..cdec22088423 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -57,6 +57,7 @@ kecho := $($(quiet)kecho)
 # - If the content differ the new file is used
 # - If they are equal no change, and no timestamp update
 define filechk
+	$(check-FORCE)
 	$(Q)set -e;						\
 	mkdir -p $(dir $@);					\
 	trap "rm -f $(dot-target).tmp" EXIT;			\
@@ -130,13 +131,19 @@ make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1))))
 # PHONY targets skipped in both cases.
 newer-prereqs = $(filter-out $(PHONY),$?)
 
+# It is a typical mistake to forget the FORCE prerequisite. Check it here so
+# no more breakage will slip in.
+check-FORCE = $(if $(filter FORCE, $^),,$(warning FORCE prerequisite is missing))
+
+if-changed-cond = $(newer-prereqs)$(cmd-check)$(check-FORCE)
+
 # Execute command if command has changed or prerequisite(s) are updated.
-if_changed = $(if $(newer-prereqs)$(cmd-check),                              \
+if_changed = $(if $(if-changed-cond),                                        \
 	$(cmd);                                                              \
 	printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
 
 # Execute the command and also postprocess generated .d dependencies file.
-if_changed_dep = $(if $(newer-prereqs)$(cmd-check),$(cmd_and_fixdep),@:)
+if_changed_dep = $(if $(if-changed-cond),$(cmd_and_fixdep),@:)
 
 cmd_and_fixdep =                                                             \
 	$(cmd);                                                              \
@@ -146,7 +153,7 @@ cmd_and_fixdep =                                                             \
 # Usage: $(call if_changed_rule,foo)
 # Will check if $(cmd_foo) or any of the prerequisites changed,
 # and if so will execute $(rule_foo).
-if_changed_rule = $(if $(newer-prereqs)$(cmd-check),$(rule_$(1)),@:)
+if_changed_rule = $(if $(if-changed-cond),$(rule_$(1)),@:)
 
 ###
 # why - tell why a target got built
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 02197cb8e3a7..3efc984d4c69 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -88,6 +88,10 @@ endif
 
 targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m)))
 
+ifdef CONFIG_LTO_CLANG
+targets-for-modules += $(patsubst %.o, %.lto.o, $(filter %.o, $(obj-m)))
+endif
+
 ifdef need-modorder
 targets-for-modules += $(obj)/modules.order
 endif
@@ -173,6 +177,8 @@ cmd_modversions_c =								\
 	if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then			\
 		$(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes))	\
 		    > $@.symversions;						\
+	else									\
+		rm -f $@.symversions;						\
 	fi;
 else
 cmd_modversions_c =								\
@@ -271,12 +277,33 @@ $(obj)/%.o: $(src)/%.c $(recordmcount_source) $$(objtool_dep) FORCE
 	$(call if_changed_rule,cc_o_c)
 	$(call cmd,force_checksrc)
 
+ifdef CONFIG_LTO_CLANG
+# Module .o files may contain LLVM bitcode, compile them into native code
+# before ELF processing
+quiet_cmd_cc_lto_link_modules = LTO [M] $@
+cmd_cc_lto_link_modules =						\
+	$(LD) $(ld_flags) -r -o $@					\
+		$(shell [ -s $(@:.lto.o=.o.symversions) ] &&		\
+			echo -T $(@:.lto.o=.o.symversions))		\
+		--whole-archive $(filter-out FORCE,$^)
+
+ifdef CONFIG_STACK_VALIDATION
+# objtool was skipped for LLVM bitcode, run it now that we have compiled
+# modules into native code
+cmd_cc_lto_link_modules += ;						\
+	$(objtree)/tools/objtool/objtool $(objtool_args) --module $@
+endif
+
+$(obj)/%.lto.o: $(obj)/%.o FORCE
+	$(call if_changed,cc_lto_link_modules)
+endif
+
 cmd_mod = { \
 	echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \
 	$(undefined_syms) echo; \
 	} > $@
 
-$(obj)/%.mod: $(obj)/%.o FORCE
+$(obj)/%.mod: $(obj)/%$(mod-prelink-ext).o FORCE
 	$(call if_changed,mod)
 
 quiet_cmd_cc_lst_c = MKLST   $@
@@ -381,7 +408,6 @@ $(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
 $(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
 
 # combine symversions for later processing
-quiet_cmd_update_lto_symversions = SYMVER  $@
 ifeq ($(CONFIG_LTO_CLANG) $(CONFIG_MODVERSIONS),y y)
       cmd_update_lto_symversions =					\
 	rm -f $@.symversions						\
diff --git a/scripts/Makefile.clang b/scripts/Makefile.clang
new file mode 100644
index 000000000000..4cce8fd0779c
--- /dev/null
+++ b/scripts/Makefile.clang
@@ -0,0 +1,35 @@
+# Individual arch/{arch}/Makefiles should use -EL/-EB to set intended
+# endianness and -m32/-m64 to set word size based on Kconfigs instead of
+# relying on the target triple.
+CLANG_TARGET_FLAGS_arm		:= arm-linux-gnueabi
+CLANG_TARGET_FLAGS_arm64	:= aarch64-linux-gnu
+CLANG_TARGET_FLAGS_hexagon	:= hexagon-linux-musl
+CLANG_TARGET_FLAGS_m68k		:= m68k-linux-gnu
+CLANG_TARGET_FLAGS_mips		:= mipsel-linux-gnu
+CLANG_TARGET_FLAGS_powerpc	:= powerpc64le-linux-gnu
+CLANG_TARGET_FLAGS_riscv	:= riscv64-linux-gnu
+CLANG_TARGET_FLAGS_s390		:= s390x-linux-gnu
+CLANG_TARGET_FLAGS_x86		:= x86_64-linux-gnu
+CLANG_TARGET_FLAGS		:= $(CLANG_TARGET_FLAGS_$(SRCARCH))
+
+ifeq ($(CROSS_COMPILE),)
+ifeq ($(CLANG_TARGET_FLAGS),)
+$(error Specify CROSS_COMPILE or add '--target=' option to scripts/Makefile.clang)
+else
+CLANG_FLAGS	+= --target=$(CLANG_TARGET_FLAGS)
+endif # CLANG_TARGET_FLAGS
+else
+CLANG_FLAGS	+= --target=$(notdir $(CROSS_COMPILE:%-=%))
+endif # CROSS_COMPILE
+
+ifeq ($(LLVM_IAS),0)
+CLANG_FLAGS	+= -fno-integrated-as
+GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
+CLANG_FLAGS	+= --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
+else
+CLANG_FLAGS	+= -fintegrated-as
+endif
+CLANG_FLAGS	+= -Werror=unknown-warning-option
+KBUILD_CFLAGS	+= $(CLANG_FLAGS)
+KBUILD_AFLAGS	+= $(CLANG_FLAGS)
+export CLANG_FLAGS
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index c57f14ac6f99..54582673fc1a 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -225,17 +225,23 @@ dtc_cpp_flags  = -Wp,-MMD,$(depfile).pre.tmp -nostdinc                    \
 		 $(addprefix -I,$(DTC_INCLUDE))                          \
 		 -undef -D__DTS__
 
+ifeq ($(CONFIG_LTO_CLANG),y)
+# With CONFIG_LTO_CLANG, .o files in modules might be LLVM bitcode, so we
+# need to run LTO to compile them into native code (.lto.o) before further
+# processing.
+mod-prelink-ext := .lto
+endif
+
 # Objtool arguments are also needed for modfinal with LTO, so we define
 # then here to avoid duplication.
 objtool_args =								\
 	$(if $(CONFIG_UNWINDER_ORC),orc generate,check)			\
-	$(if $(part-of-module), --module,)				\
+	$(if $(part-of-module), --module)				\
 	$(if $(CONFIG_FRAME_POINTER),, --no-fp)				\
-	$(if $(or $(CONFIG_GCOV_KERNEL),$(CONFIG_LTO_CLANG)), 		\
-		--no-unreachable,)					\
-	$(if $(CONFIG_RETPOLINE), --retpoline,)				\
-	$(if $(CONFIG_X86_SMAP), --uaccess,)				\
-	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount,)
+	$(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\
+	$(if $(CONFIG_RETPOLINE), --retpoline)				\
+	$(if $(CONFIG_X86_SMAP), --uaccess)				\
+	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)
 
 # Useful for describing the dependency of composite objects
 # Usage:
diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal
index 5e9b8057fb24..ff805777431c 100644
--- a/scripts/Makefile.modfinal
+++ b/scripts/Makefile.modfinal
@@ -9,7 +9,7 @@ __modfinal:
 include include/config/auto.conf
 include $(srctree)/scripts/Kbuild.include
 
-# for c_flags and objtool_args
+# for c_flags and mod-prelink-ext
 include $(srctree)/scripts/Makefile.lib
 
 # find all modules listed in modules.order
@@ -30,23 +30,6 @@ quiet_cmd_cc_o_c = CC [M]  $@
 
 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
 
-ifdef CONFIG_LTO_CLANG
-# With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to
-# avoid a second slow LTO link
-prelink-ext := .lto
-
-# ELF processing was skipped earlier because we didn't have native code,
-# so let's now process the prelinked binary before we link the module.
-
-ifdef CONFIG_STACK_VALIDATION
-cmd_ld_ko_o +=								\
-	$(objtree)/tools/objtool/objtool $(objtool_args)		\
-		$(@:.ko=$(prelink-ext).o);
-
-endif # CONFIG_STACK_VALIDATION
-
-endif # CONFIG_LTO_CLANG
-
 quiet_cmd_ld_ko_o = LD [M]  $@
       cmd_ld_ko_o +=							\
 	$(LD) -r $(KBUILD_LDFLAGS)					\
@@ -72,7 +55,7 @@ if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check),      \
 
 
 # Re-generate module BTFs if either module's .ko or vmlinux changed
-$(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
+$(modules): %.ko: %$(mod-prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
 	+$(call if_changed_except,ld_ko_o,vmlinux)
 ifdef CONFIG_DEBUG_INFO_BTF_MODULES
 	+$(if $(newer-prereqs),$(call cmd,btf_ko))
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index c383ba33d837..eef56d629799 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -41,7 +41,7 @@ __modpost:
 include include/config/auto.conf
 include $(srctree)/scripts/Kbuild.include
 
-# for ld_flags
+# for mod-prelink-ext
 include $(srctree)/scripts/Makefile.lib
 
 MODPOST = scripts/mod/modpost								\
@@ -118,22 +118,6 @@ $(input-symdump):
 	@echo >&2 '         Modules may not have dependencies or modversions.'
 	@echo >&2 '         You may get many unresolved symbol warnings.'
 
-ifdef CONFIG_LTO_CLANG
-# With CONFIG_LTO_CLANG, .o files might be LLVM bitcode, so we need to run
-# LTO to compile them into native code before running modpost
-prelink-ext := .lto
-
-quiet_cmd_cc_lto_link_modules = LTO [M] $@
-cmd_cc_lto_link_modules =						\
-	$(LD) $(ld_flags) -r -o $@					\
-		$(shell [ -s $(@:.lto.o=.o.symversions) ] &&		\
-			echo -T $(@:.lto.o=.o.symversions))		\
-		--whole-archive $^
-
-%.lto.o: %.o
-	$(call if_changed,cc_lto_link_modules)
-endif
-
 modules := $(sort $(shell cat $(MODORDER)))
 
 # KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined symbols
@@ -144,9 +128,9 @@ endif
 # Read out modules.order to pass in modpost.
 # Otherwise, allmodconfig would fail with "Argument list too long".
 quiet_cmd_modpost = MODPOST $@
-      cmd_modpost = sed 's/\.ko$$/$(prelink-ext)\.o/' $< | $(MODPOST) -T -
+      cmd_modpost = sed 's/\.ko$$/$(mod-prelink-ext)\.o/' $< | $(MODPOST) -T -
 
-$(output-symdump): $(MODORDER) $(input-symdump) $(modules:.ko=$(prelink-ext).o) FORCE
+$(output-symdump): $(MODORDER) $(input-symdump) $(modules:.ko=$(mod-prelink-ext).o) FORCE
 	$(call if_changed,modpost)
 
 targets += $(output-symdump)
diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index d8f6f9c63043..59fdb875e818 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -42,10 +42,10 @@ $CONFIG_SHELL $srctree/scripts/gen_autoksyms.sh "$new_ksyms_file"
 changed=$(
 count=0
 sort "$cur_ksyms_file" "$new_ksyms_file" | uniq -u |
-sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' | tr "A-Z_" "a-z/" |
+sed -n 's/^#define __KSYM_\(.*\) 1/\1/p' |
 while read sympath; do
 	if [ -z "$sympath" ]; then continue; fi
-	depfile="include/ksym/${sympath}.h"
+	depfile="include/ksym/${sympath}"
 	mkdir -p "$(dirname "$depfile")"
 	touch "$depfile"
 	# Filesystems with coarse time precision may create timestamps
diff --git a/scripts/as-version.sh b/scripts/as-version.sh
index 8b9410e329df..1a21495e9ff0 100755
--- a/scripts/as-version.sh
+++ b/scripts/as-version.sh
@@ -21,14 +21,14 @@ get_canonical_version()
 	echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
 }
 
-# Clang fails to handle -Wa,--version unless -no-integrated-as is given.
-# We check -(f)integrated-as, expecting it is explicitly passed in for the
+# Clang fails to handle -Wa,--version unless -fno-integrated-as is given.
+# We check -fintegrated-as, expecting it is explicitly passed in for the
 # integrated assembler case.
 check_integrated_as()
 {
 	while [ $# -gt 0 ]; do
-		if [ "$1" = -integrated-as -o "$1" = -fintegrated-as ]; then
-			# For the intergrated assembler, we do not check the
+		if [ "$1" = -fintegrated-as ]; then
+			# For the integrated assembler, we do not check the
 			# version here. It is the same as the clang version, and
 			# it has been already checked by scripts/cc-version.sh.
 			echo LLVM 0
diff --git a/scripts/checkdeclares.pl b/scripts/checkdeclares.pl
index f6d551c84fc6..f6d551c84fc6 100644..100755
--- a/scripts/checkdeclares.pl
+++ b/scripts/checkdeclares.pl
diff --git a/scripts/checkkconfigsymbols.py b/scripts/checkkconfigsymbols.py
index 1548f9ce4682..b9b0f15e5880 100755
--- a/scripts/checkkconfigsymbols.py
+++ b/scripts/checkkconfigsymbols.py
@@ -329,7 +329,7 @@ def check_symbols_helper(pool, ignore):
         if REGEX_FILE_KCONFIG.match(gitfile):
             kconfig_files.append(gitfile)
         else:
-            if ignore and not re.match(ignore, gitfile):
+            if ignore and re.match(ignore, gitfile):
                 continue
             # add source files that do not match the ignore pattern
             source_files.append(gitfile)
diff --git a/scripts/clang-tools/gen_compile_commands.py b/scripts/clang-tools/gen_compile_commands.py
index b7e9ecf16e56..0033eedce003 100755
--- a/scripts/clang-tools/gen_compile_commands.py
+++ b/scripts/clang-tools/gen_compile_commands.py
@@ -18,7 +18,7 @@ _DEFAULT_OUTPUT = 'compile_commands.json'
 _DEFAULT_LOG_LEVEL = 'WARNING'
 
 _FILENAME_PATTERN = r'^\..*\.cmd$'
-_LINE_PATTERN = r'^cmd_[^ ]*\.o := (.* )([^ ]*\.c)$'
+_LINE_PATTERN = r'^cmd_[^ ]*\.o := (.* )([^ ]*\.c) *(;|$)'
 _VALID_LOG_LEVELS = ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL']
 # The tools/ directory adopts a different build system, and produces .cmd
 # files in a different format. Do not support it.
diff --git a/scripts/gcc-plugins/gen-random-seed.sh b/scripts/gcc-plugins/gen-random-seed.sh
index 68af5cc20a64..68af5cc20a64 100644..100755
--- a/scripts/gcc-plugins/gen-random-seed.sh
+++ b/scripts/gcc-plugins/gen-random-seed.sh
diff --git a/scripts/gen_autoksyms.sh b/scripts/gen_autoksyms.sh
index da320151e7c3..6ed0d225c8b1 100755
--- a/scripts/gen_autoksyms.sh
+++ b/scripts/gen_autoksyms.sh
@@ -26,18 +26,6 @@ if [ -n "$CONFIG_MODVERSIONS" ]; then
 	needed_symbols="$needed_symbols module_layout"
 fi
 
-# With CONFIG_LTO_CLANG, LLVM bitcode has not yet been compiled into a binary
-# when the .mod files are generated, which means they don't yet contain
-# references to certain symbols that will be present in the final binaries.
-if [ -n "$CONFIG_LTO_CLANG" ]; then
-	# intrinsic functions
-	needed_symbols="$needed_symbols memcpy memmove memset"
-	# ftrace
-	needed_symbols="$needed_symbols _mcount"
-	# stack protector symbols
-	needed_symbols="$needed_symbols __stack_chk_fail __stack_chk_guard"
-fi
-
 ksym_wl=
 if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
 	# Use 'eval' to expand the whitelist path and check if it is relative
diff --git a/scripts/gen_ksymdeps.sh b/scripts/gen_ksymdeps.sh
index 1324986e1362..8ee533f33659 100755
--- a/scripts/gen_ksymdeps.sh
+++ b/scripts/gen_ksymdeps.sh
@@ -4,7 +4,13 @@
 set -e
 
 # List of exported symbols
-ksyms=$($NM $1 | sed -n 's/.*__ksym_marker_\(.*\)/\1/p' | tr A-Z a-z)
+#
+# If the object has no symbol, $NM warns 'no symbols'.
+# Suppress the stderr.
+# TODO:
+#   Use -q instead of 2>/dev/null when we upgrade the minimum version of
+#   binutils to 2.37, llvm to 13.0.0.
+ksyms=$($NM $1 2>/dev/null | sed -n 's/.*__ksym_marker_\(.*\)/\1/p')
 
 if [ -z "$ksyms" ]; then
 	exit 0
@@ -15,8 +21,7 @@ echo "ksymdeps_$1 := \\"
 
 for s in $ksyms
 do
-	echo $s | sed -e 's:^_*:    $(wildcard include/ksym/:' \
-			-e 's:__*:/:g' -e 's/$/.h) \\/'
+	printf '    $(wildcard include/ksym/%s) \\\n' "$s"
 done
 
 echo
diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
index 63c8565206a4..e5b46980c22a 100755
--- a/scripts/kconfig/merge_config.sh
+++ b/scripts/kconfig/merge_config.sh
@@ -28,6 +28,7 @@ usage() {
 	echo "  -r    list redundant entries when merging fragments"
 	echo "  -y    make builtin have precedence over modules"
 	echo "  -O    dir to put generated output files.  Consider setting \$KCONFIG_CONFIG instead."
+	echo "  -s    strict mode. Fail if the fragment redefines any value."
 	echo
 	echo "Used prefix: '$CONFIG_PREFIX'. You can redefine it with \$CONFIG_ environment variable."
 }
@@ -37,6 +38,7 @@ ALLTARGET=alldefconfig
 WARNREDUN=false
 BUILTIN=false
 OUTPUT=.
+STRICT=false
 CONFIG_PREFIX=${CONFIG_-CONFIG_}
 
 while true; do
@@ -75,6 +77,11 @@ while true; do
 		shift 2
 		continue
 		;;
+	"-s")
+		STRICT=true
+		shift
+		continue
+		;;
 	*)
 		break
 		;;
@@ -141,6 +148,9 @@ for ORIG_MERGE_FILE in $MERGE_LIST ; do
 			echo Previous  value: $PREV_VAL
 			echo New value:       $NEW_VAL
 			echo
+			if [ "$STRICT" = "true" ]; then
+				STRICT_MODE_VIOLATED=true
+			fi
 		elif [ "$WARNREDUN" = "true" ]; then
 			echo Value of $CFG is redundant by fragment $ORIG_MERGE_FILE:
 		fi
@@ -153,6 +163,11 @@ for ORIG_MERGE_FILE in $MERGE_LIST ; do
 	cat $MERGE_FILE >> $TMP_FILE
 done
 
+if [ "$STRICT_MODE_VIOLATED" = "true" ]; then
+	echo "The fragment redefined a value and strict mode had been passed."
+	exit 1
+fi
+
 if [ "$RUNMAKE" = "false" ]; then
 	cp -T -- "$TMP_FILE" "$KCONFIG_CONFIG"
 	echo "#"
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
index 36ef7b37fc5d..d74cee5c4326 100755
--- a/scripts/link-vmlinux.sh
+++ b/scripts/link-vmlinux.sh
@@ -149,67 +149,54 @@ objtool_link()
 # ${2}, ${3}, ... - optional extra .o files
 vmlinux_link()
 {
-	local lds="${objtree}/${KBUILD_LDS}"
 	local output=${1}
-	local objects
-	local strip_debug
-	local map_option
+	local objs
+	local libs
+	local ld
+	local ldflags
+	local ldlibs
 
 	info LD ${output}
 
 	# skip output file argument
 	shift
 
+	if [ -n "${CONFIG_LTO_CLANG}" ]; then
+		# Use vmlinux.o instead of performing the slow LTO link again.
+		objs=vmlinux.o
+		libs=
+	else
+		objs="${KBUILD_VMLINUX_OBJS}"
+		libs="${KBUILD_VMLINUX_LIBS}"
+	fi
+
+	if [ "${SRCARCH}" = "um" ]; then
+		wl=-Wl,
+		ld="${CC}"
+		ldflags="${CFLAGS_vmlinux}"
+		ldlibs="-lutil -lrt -lpthread"
+	else
+		wl=
+		ld="${LD}"
+		ldflags="${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}"
+		ldlibs=
+	fi
+
+	ldflags="${ldflags} ${wl}--script=${objtree}/${KBUILD_LDS}"
+
 	# The kallsyms linking does not need debug symbols included.
 	if [ "$output" != "${output#.tmp_vmlinux.kallsyms}" ] ; then
-		strip_debug=-Wl,--strip-debug
+		ldflags="${ldflags} ${wl}--strip-debug"
 	fi
 
 	if [ -n "${CONFIG_VMLINUX_MAP}" ]; then
-		map_option="-Map=${output}.map"
+		ldflags="${ldflags} ${wl}-Map=${output}.map"
 	fi
 
-	if [ "${SRCARCH}" != "um" ]; then
-		if [ -n "${CONFIG_LTO_CLANG}" ]; then
-			# Use vmlinux.o instead of performing the slow LTO
-			# link again.
-			objects="--whole-archive		\
-				vmlinux.o 			\
-				--no-whole-archive		\
-				${@}"
-		else
-			objects="--whole-archive		\
-				${KBUILD_VMLINUX_OBJS}		\
-				--no-whole-archive		\
-				--start-group			\
-				${KBUILD_VMLINUX_LIBS}		\
-				--end-group			\
-				${@}"
-		fi
-
-		${LD} ${KBUILD_LDFLAGS} ${LDFLAGS_vmlinux}	\
-			${strip_debug#-Wl,}			\
-			-o ${output}				\
-			${map_option}				\
-			-T ${lds} ${objects}
-	else
-		objects="-Wl,--whole-archive			\
-			${KBUILD_VMLINUX_OBJS}			\
-			-Wl,--no-whole-archive			\
-			-Wl,--start-group			\
-			${KBUILD_VMLINUX_LIBS}			\
-			-Wl,--end-group				\
-			${@}"
-
-		${CC} ${CFLAGS_vmlinux}				\
-			${strip_debug}				\
-			-o ${output}				\
-			${map_option:+-Wl,${map_option}}	\
-			-Wl,-T,${lds}				\
-			${objects}				\
-			-lutil -lrt -lpthread
-		rm -f linux
-	fi
+	${ld} ${ldflags} -o ${output}					\
+		${wl}--whole-archive ${objs} ${wl}--no-whole-archive	\
+		${wl}--start-group ${libs} ${wl}--end-group		\
+		$@ ${ldlibs}
 }
 
 # generate .BTF typeinfo from DWARF debuginfo
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 1209e1786af7..cb8ab7d91d30 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -17,6 +17,7 @@
 #include <ctype.h>
 #include <string.h>
 #include <limits.h>
+#include <stdbool.h>
 #include <errno.h>
 #include "modpost.h"
 #include "../../include/linux/license.h"
@@ -89,6 +90,14 @@ modpost_log(enum loglevel loglevel, const char *fmt, ...)
 		error_occurred = true;
 }
 
+static inline bool strends(const char *str, const char *postfix)
+{
+	if (strlen(str) < strlen(postfix))
+		return false;
+
+	return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
+}
+
 void *do_nofail(void *ptr, const char *expr)
 {
 	if (!ptr)
@@ -2060,7 +2069,7 @@ static void read_symbols(const char *modname)
 	if (!mod->is_vmlinux) {
 		version = get_modinfo(&info, "version");
 		if (version || all_versions)
-			get_src_version(modname, mod->srcversion,
+			get_src_version(mod->name, mod->srcversion,
 					sizeof(mod->srcversion) - 1);
 	}
 
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index c1a895c0d682..0c47ff95c0e2 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -2,7 +2,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdarg.h>
-#include <stdbool.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -178,14 +177,6 @@ static inline unsigned int get_secindex(const struct elf_info *info,
 	return info->symtab_shndx_start[sym - info->symtab_start];
 }
 
-static inline bool strends(const char *str, const char *postfix)
-{
-	if (strlen(str) < strlen(postfix))
-		return false;
-
-	return strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
-}
-
 /* file2alias.c */
 extern unsigned int cross_build;
 void handle_moddevtable(struct module *mod, struct elf_info *info,
diff --git a/scripts/mod/sumversion.c b/scripts/mod/sumversion.c
index 760e6baa7eda..905c0ec291e1 100644
--- a/scripts/mod/sumversion.c
+++ b/scripts/mod/sumversion.c
@@ -391,14 +391,9 @@ void get_src_version(const char *modname, char sum[], unsigned sumlen)
 	struct md4_ctx md;
 	char *fname;
 	char filelist[PATH_MAX + 1];
-	int postfix_len = 1;
-
-	if (strends(modname, ".lto.o"))
-		postfix_len = 5;
 
 	/* objects for a module are listed in the first line of *.mod file. */
-	snprintf(filelist, sizeof(filelist), "%.*smod",
-		 (int)strlen(modname) - postfix_len, modname);
+	snprintf(filelist, sizeof(filelist), "%s.mod", modname);
 
 	buf = read_text_file(filelist);
 
diff --git a/scripts/syscallnr.sh b/scripts/syscallnr.sh
index 3aa29e0dcc52..3aa29e0dcc52 100644..100755
--- a/scripts/syscallnr.sh
+++ b/scripts/syscallnr.sh
diff --git a/scripts/xen-hypercalls.sh b/scripts/xen-hypercalls.sh
index f18b00843df3..f18b00843df3 100644..100755
--- a/scripts/xen-hypercalls.sh
+++ b/scripts/xen-hypercalls.sh
diff --git a/security/Makefile b/security/Makefile
index 47e432900e24..18121f8f85cd 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -4,16 +4,6 @@
 #
 
 obj-$(CONFIG_KEYS)			+= keys/
-subdir-$(CONFIG_SECURITY_SELINUX)	+= selinux
-subdir-$(CONFIG_SECURITY_SMACK)		+= smack
-subdir-$(CONFIG_SECURITY_TOMOYO)        += tomoyo
-subdir-$(CONFIG_SECURITY_APPARMOR)	+= apparmor
-subdir-$(CONFIG_SECURITY_YAMA)		+= yama
-subdir-$(CONFIG_SECURITY_LOADPIN)	+= loadpin
-subdir-$(CONFIG_SECURITY_SAFESETID)    += safesetid
-subdir-$(CONFIG_SECURITY_LOCKDOWN_LSM)	+= lockdown
-subdir-$(CONFIG_BPF_LSM)		+= bpf
-subdir-$(CONFIG_SECURITY_LANDLOCK)	+= landlock
 
 # always enable default capabilities
 obj-y					+= commoncap.o
@@ -36,5 +26,4 @@ obj-$(CONFIG_BPF_LSM)			+= bpf/
 obj-$(CONFIG_SECURITY_LANDLOCK)		+= landlock/
 
 # Object integrity file lists
-subdir-$(CONFIG_INTEGRITY)		+= integrity
 obj-$(CONFIG_INTEGRITY)			+= integrity/
diff --git a/sound/aoa/codecs/onyx.h b/sound/aoa/codecs/onyx.h
index 8a32c3c3d716..6c31b7373b78 100644
--- a/sound/aoa/codecs/onyx.h
+++ b/sound/aoa/codecs/onyx.h
@@ -6,7 +6,6 @@
  */
 #ifndef __SND_AOA_CODEC_ONYX_H
 #define __SND_AOA_CODEC_ONYX_H
-#include <stddef.h>
 #include <linux/i2c.h>
 #include <asm/pmac_low_i2c.h>
 #include <asm/prom.h>
diff --git a/sound/aoa/codecs/tas.c b/sound/aoa/codecs/tas.c
index ac246dd3ab49..ab19a37e2a68 100644
--- a/sound/aoa/codecs/tas.c
+++ b/sound/aoa/codecs/tas.c
@@ -58,7 +58,6 @@
  *    and up to the hardware designer to not wire
  *    them up in some weird unusable way.
  */
-#include <stddef.h>
 #include <linux/i2c.h>
 #include <asm/pmac_low_i2c.h>
 #include <asm/prom.h>
diff --git a/sound/core/info.c b/sound/core/info.c
index 9fec3070f8ba..a451b24199c3 100644
--- a/sound/core/info.c
+++ b/sound/core/info.c
@@ -16,7 +16,6 @@
 #include <linux/utsname.h>
 #include <linux/proc_fs.h>
 #include <linux/mutex.h>
-#include <stdarg.h>
 
 int snd_info_check_reserved_words(const char *str)
 {
author	Linus Torvalds <torvalds@linux-foundation.org>	2021-09-04 01:33:47 +0300
committer	Linus Torvalds <torvalds@linux-foundation.org>	2021-09-04 01:33:47 +0300
commit	b250e6d141ce4f0d0ada60e4b5db577050e5feb0 (patch)
tree	682fd38e7efab61cc0963fa9e3137cdba2106111
parent	4e71add02821bdd204dd29c35e66baecc9b6a235 (diff)
parent	bc7cd2dd1f8e5889cc68b69984033ac5bef6ba61 (diff)
download	linux-b250e6d141ce4f0d0ada60e4b5db577050e5feb0.tar.xz