kernel/linux.git/scripts, branch v5.13-rc2

Merge tag 'kbuild-v5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2021-05-08T17:00:11+00:00

Pull more Kbuild updates from Masahiro Yamada: - Convert sh and sparc to use generic shell scripts to generate the syscall headers - refactor .gitignore files - Update kernel/config_data.gz only when the content of the .config is really changed, which avoids the unneeded re-link of vmlinux - move "remove stale files" workarounds to scripts/remove-stale-files - suppress unused-but-set-variable warnings by default for Clang as well - fix locale setting LANG=C to LC_ALL=C - improve 'make distclean' - always keep intermediate objects from scripts/link-vmlinux.sh - move IF_ENABLED out of to make it self-contained - misc cleanups * tag 'kbuild-v5.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (25 commits) linux/kconfig.h: replace IF_ENABLED() with PTR_IF() in kbuild: Don't remove link-vmlinux temporary files on exit/signal kbuild: remove the unneeded comments for external module builds kbuild: make distclean remove tag files in sub-directories kbuild: make distclean work against $(objtree) instead of $(srctree) kbuild: refactor modname-multi by using suffix-search kbuild: refactor fdtoverlay rule kbuild: parameterize the .o part of suffix-search arch: use cross_compiling to check whether it is a cross build or not kbuild: remove ARCH=sh64 support from top Makefile .gitignore: prefix local generated files with a slash kbuild: replace LANG=C with LC_ALL=C Makefile: Move -Wno-unused-but-set-variable out of GCC only block kbuild: add a script to remove stale generated files kbuild: update config_data.gz only when the content of .config is changed .gitignore: ignore only top-level modules.builtin .gitignore: move tags and TAGS close to other tag files kernel/.gitgnore: remove stale timeconst.h and hz.bc usr/include: refactor .gitignore genksyms: fix stale comment ...

Merge branch 'akpm' (patches from Andrew)

2021-05-07T07:34:51+00:00

Merge yet more updates from Andrew Morton: "This is everything else from -mm for this merge window. 90 patches. Subsystems affected by this patch series: mm (cleanups and slub), alpha, procfs, sysctl, misc, core-kernel, bitmap, lib, compat, checkpatch, epoll, isofs, nilfs2, hpfs, exit, fork, kexec, gcov, panic, delayacct, gdb, resource, selftests, async, initramfs, ipc, drivers/char, and spelling" * emailed patches from Andrew Morton : (90 commits) mm: fix typos in comments mm: fix typos in comments treewide: remove editor modelines and cruft ipc/sem.c: spelling fix fs: fat: fix spelling typo of values kernel/sys.c: fix typo kernel/up.c: fix typo kernel/user_namespace.c: fix typos kernel/umh.c: fix some spelling mistakes include/linux/pgtable.h: few spelling fixes mm/slab.c: fix spelling mistake "disired" -> "desired" scripts/spelling.txt: add "overflw" scripts/spelling.txt: Add "diabled" typo scripts/spelling.txt: add "overlfow" arm: print alloc free paths for address in registers mm/vmalloc: remove vwrite() mm: remove xlate_dev_kmem_ptr() drivers/char: remove /dev/kmem for good mm: fix some typos and code style problems ipc/sem.c: mundane typo fixes ...

scripts/spelling.txt: add "overflw"

2021-05-07T07:26:34+00:00

Add typo "overflw" for "overflow". This typo was found and fixed in drivers/clocksource/timer-pistachio.c. Link: https://lore.kernel.org/lkml/20210305090315.384547-1-drew@beagleboard.org/ Link: https://lkml.kernel.org/r/20210305095151.388182-1-drew@beagleboard.org Signed-off-by: Drew Fustini Suggested-by: Gustavo A. R. Silva Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/spelling.txt: Add "diabled" typo

2021-05-07T07:26:34+00:00

Increase "diabled" spelling error check. Link: https://lkml.kernel.org/r/20210304070106.2313-1-zuoqilin1@163.com Signed-off-by: zuoqilin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/spelling.txt: add "overlfow"

2021-05-07T07:26:34+00:00

Add typo "overlfow" for "overflow". This typo was found and fixed in net/sctp/tsnmap.c. Link: https://lore.kernel.org/netdev/20210304055548.56829-1-drew@beagleboard.org/ Link: https://lkml.kernel.org/r/20210304072657.64577-1-drew@beagleboard.org Signed-off-by: Drew Fustini Suggested-by: Kees Cook Reviewed-by: Kees Cook Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/gdb: add lx_current support for arm64

2021-05-07T07:26:33+00:00

arm64 uses SP_EL0 to save the current task_struct address. While running in EL0, SP_EL0 is clobbered by userspace. So if the upper bit is not 1 (not TTBR1), the current address is invalid. This patch checks the upper bit of SP_EL0, if the upper bit is 1, lx_current() of arm64 will return the derefrence of current task. Otherwise, lx_current() will tell users they are running in userspace(EL0). While arm64 is running in EL0, it is actually pointless to print current task as the memory of kernel space is not accessible in EL0. Link: https://lkml.kernel.org/r/20210314203444.15188-3-song.bao.hua@hisilicon.com Signed-off-by: Barry Song Cc: Jan Kiszka Cc: Jonathan Corbet Cc: Kieran Bingham Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

scripts/gdb: document lx_current is only supported by x86

2021-05-07T07:26:33+00:00

Patch series "scripts/gdb: clarify the platforms supporting lx_current and add arm64 support", v2. lx_current depends on per_cpu current_task variable which exists on x86 only. so it actually works on x86 only. the 1st patch documents this clearly; the 2nd patch adds support for arm64. This patch (of 2): x86 is the only architecture which has per_cpu current_task: arch$ git grep current_task | grep -i per_cpu x86/include/asm/current.h:DECLARE_PER_CPU(struct task_struct *, current_task); x86/kernel/cpu/common.c:DEFINE_PER_CPU(struct task_struct *, current_task) ____cacheline_aligned = x86/kernel/cpu/common.c:EXPORT_PER_CPU_SYMBOL(current_task); x86/kernel/cpu/common.c:DEFINE_PER_CPU(struct task_struct *, current_task) = &init_task; x86/kernel/cpu/common.c:EXPORT_PER_CPU_SYMBOL(current_task); x86/kernel/smpboot.c: per_cpu(current_task, cpu) = idle; On other architectures, lx_current() will lead to a python exception: (gdb) p $lx_current().pid Python Exception No symbol "current_task" in current context.: Error occurred in Python: No symbol "current_task" in current context. To avoid more people struggling and wasting time in other architectures, document it. Link: https://lkml.kernel.org/r/20210314203444.15188-1-song.bao.hua@hisilicon.com Link: https://lkml.kernel.org/r/20210314203444.15188-2-song.bao.hua@hisilicon.com Signed-off-by: Barry Song Cc: Jan Kiszka Cc: Kieran Bingham Cc: Jonathan Corbet Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

gdb: lx-symbols: store the abspath()

2021-05-07T07:26:32+00:00

If we store the relative path, the user might later cd to a different directory, and that would break the automatic symbol resolving that happens when a module is loaded into the target kernel. Fix this by storing the abspath() of each path given, just like we already do for the cwd (os.getcwd() is absolute.) Link: https://lkml.kernel.org/r/20201217091747.bf4332cf2b35.I10ebbdb7e9b80ab1a5cddebf53d073be8232d656@changeid Signed-off-by: Johannes Berg Reviewed-by: Jan Kiszka Cc: Kieran Bingham Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

checkpatch: improve ALLOC_ARRAY_ARGS test

2021-05-07T02:24:13+00:00

The devm_ variant of 'kcalloc()' and 'kmalloc_array()' are not tested Add the corresponding check. Link: https://lkml.kernel.org/r/205fc4847972fb6779abcc8818f39c14d1b45af1.1618595794.git.christophe.jaillet@wanadoo.fr Signed-off-by: Christophe JAILLET Acked-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

checkpatch: exclude four preprocessor sub-expressions from MACRO_ARG_REUSE

2021-05-07T02:24:13+00:00

__must_be_array, offsetof, sizeof_field and __stringify are all preprocessor macros and do not evaluate their arguments. As such, it is safe not to warn when arguments are being reused in those four sub-expressions. Exclude those so that they can pass checkpatch. Link: https://lkml.kernel.org/r/20210407105042.25380-1-mailhol.vincent@wanadoo.fr Signed-off-by: Vincent Mailhol Acked-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds