linux-toradex.git/tools/include/linux, branch v5.11-rc6

tools headers: Syncronize linux/build_bug.h with the kernel sources

2021-01-15T19:31:46+00:00

To pick up the changes in:

  3a176b94609a18f5 ("Revert "kbuild: avoid static_assert for genksyms"")

And silence this perf build warning:

  Warning: Kernel ABI header at 'tools/include/linux/build_bug.h' differs from latest version at 'include/linux/build_bug.h'
  diff -u tools/include/linux/build_bug.h include/linux/build_bug.h

Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Masahiro Yamada 
Cc: Namhyung Kim 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Update linux/ctype.h with the kernel sources

2020-12-18T20:32:28+00:00

To pick up the changes in:

  caabdd0f59a9771e ("ctype.h: remove duplicate isdigit() helper")

Addressing this perf build warning:

  Warning: Kernel ABI header at 'tools/include/linux/ctype.h' differs from latest version at 'include/linux/ctype.h'
  diff -u tools/include/linux/ctype.h include/linux/ctype.h

And we need to continue using the combination of:

  inline __isdigit()
  #define isdigit() __isdigit

When the __has_builtin() thing isn't available, as it is a builtin in
older systems with it as a builtin but with compilers not hacinv
__has_builtin(), rendering the __has_builtin() check useless otherwise.

Cc: Adrian Hunter 
Cc: Arnd Bergmann 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Add conditional __has_builtin()

2020-12-18T20:32:28+00:00

As it'll be used by the ctype.h sync with its kernel source original.

Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Get tools's linux/compiler.h closer to the kernel's

2020-12-18T20:32:26+00:00

We're cherry picking stuff from the kernel to allow for the other
headers that we keep in sync via tools/perf/check-headers.sh to work,
so introduce linux/compiler_types.h and from there get the compiler
specific stuff.

Cc: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Syncronize linux/build_bug.h with the kernel sources

2020-12-17T17:38:23+00:00

To pick up the changes in:

  14dc3983b5dff513 ("kbuild: avoid static_assert for genksyms")

And silence this perf build warning:

  Warning: Kernel ABI header at 'tools/include/linux/build_bug.h' differs from latest version at 'include/linux/build_bug.h'
  diff -u tools/include/linux/build_bug.h include/linux/build_bug.h

Cc: Adrian Hunter 
Cc: Arnd Bergmann 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Signed-off-by: Arnaldo Carvalho de Melo

Merge remote-tracking branch 'torvalds/master' into perf/core

2020-12-17T17:37:24+00:00

To pick up fixes and check what UAPI headers need to be synched.

Signed-off-by: Arnaldo Carvalho de Melo

mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO

2020-12-15T20:13:46+00:00

CONFIG_PAGE_POISONING_ZERO uses the zero pattern instead of 0xAA.  It was
introduced by commit 1414c7f4f7d7 ("mm/page_poisoning.c: allow for zero
poisoning"), noting that using zeroes retains the benefit of sanitizing
content of freed pages, with the benefit of not having to zero them again
on alloc, and the downside of making some forms of corruption (stray
writes of NULLs) harder to detect than with the 0xAA pattern.  Together
with CONFIG_PAGE_POISONING_NO_SANITY it made possible to sanitize the
contents on free without checking it back on alloc.

These days we have the init_on_free() option to achieve sanitization with
zeroes and to save clearing on alloc (and without checking on alloc).
Arguably if someone does choose to check the poison for corruption on
alloc, the savings of not clearing the page are secondary, and it makes
sense to always use the 0xAA poison pattern.  Thus, remove the
CONFIG_PAGE_POISONING_ZERO option for being redundant.

Link: https://lkml.kernel.org/r/20201113104033.22907-6-vbabka@suse.cz
Signed-off-by: Vlastimil Babka 
Acked-by: David Hildenbrand 
Cc: Mike Rapoport 
Cc: Rafael J. Wysocki 
Cc: Alexander Potapenko 
Cc: Kees Cook 
Cc: Laura Abbott 
Cc: Mateusz Nosek 
Cc: Michal Hocko 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tools lib: Adopt memchr_inv() from kernel

2020-11-27T11:34:52+00:00

We'll use it to check for undefined/zero data.

Signed-off-by: Jiri Olsa 
Suggested-by: Arnaldo Carvalho de Melo 
Acked-by: Namhyung Kim 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexey Budankov 
Cc: Andi Kleen 
Cc: Ian Rogers 
Cc: Mark Rutland 
Cc: Michael Petlan 
Cc: Peter Zijlstra 
Cc: Song Liu 
Cc: Stephane Eranian 
Link: http://lore.kernel.org/lkml/20201126170026.2619053-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove broken __no_tail_call attribute

2020-11-03T11:32:15+00:00

The GCC specific __attribute__((optimize)) attribute does not what is
commonly expected and is explicitly recommended against using in
production code by the GCC people.

Unlike what is often expected, it doesn't add to the optimization flags,
but it fully replaces them, loosing any and all optimization flags
provided by the compiler commandline.

The only guaranteed upon means of inhibiting tail-calls is by placing a
volatile asm with side-effects after the call such that the tail-call simply
cannot be done.

Given the original commit wasn't specific on which calls were the problem, this
removal might re-introduce the problem, which can then be re-analyzed and cured
properly.

Signed-off-by: Peter Zijlstra 
Acked-by: Ard Biesheuvel 
Acked-by: Miguel Ojeda 
Cc: Alexei Starovoitov 
Cc: Arnd Bergmann 
Cc: Arvind Sankar 
Cc: Daniel Borkmann 
Cc: Geert Uytterhoeven 
Cc: Ian Rogers 
Cc: Josh Poimboeuf 
Cc: Kees Kook 
Cc: Martin Liška 
Cc: Nick Desaulniers 
Cc: Randy Dunlap 
Cc: Thomas Gleixner 
Link: http://lore.kernel.org/lkml/20201028081123.GT2628@hirez.programming.kicks-ass.net
Signed-off-by: Arnaldo Carvalho de Melo

treewide: Convert macro and uses of section(foo) to section("foo")

2020-10-25T21:51:49+00:00

Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.

Remove the quote operator # from compiler_attributes.h __section macro.

Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.

Conversion done using the script at:

    https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl

Signed-off-by: Joe Perches 
Reviewed-by: Nick Desaulniers 
Reviewed-by: Miguel Ojeda 
Signed-off-by: Linus Torvalds

linux-toradex.git/tools/include/linux, branch v5.11-rc6

tools headers: Syncronize linux/build_bug.h with the kernel sources

tools headers: Update linux/ctype.h with the kernel sources

tools headers: Add conditional __has_builtin()

tools headers: Get tools's linux/compiler.h closer to the kernel's

tools headers: Syncronize linux/build_bug.h with the kernel sources

Merge remote-tracking branch 'torvalds/master' into perf/core

mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO

tools lib: Adopt memchr_inv() from kernel

perf tools: Remove broken __no_tail_call attribute

treewide: Convert macro and uses of __section(foo) to __section("foo")

treewide: Convert macro and uses of section(foo) to section("foo")