linux.git/tools/include/asm-generic, branch v6.18.21

tools headers asm: Sync fls headers header with the kernel sources

2025-11-03T16:35:06+00:00

To pick the changes in:

  6606c8c7e8188656 ("bitops: Add __attribute_const__ to generic ffs()-family implementations")

This addresses these tools build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/asm-generic/bitops/__fls.h include/asm-generic/bitops/__fls.h
    diff -u tools/include/asm-generic/bitops/fls.h include/asm-generic/bitops/fls.h
    diff -u tools/include/asm-generic/bitops/fls64.h include/asm-generic/bitops/fls64.h

Please see tools/include/uapi/README for further details.

Cc: Kees Cook 
Signed-off-by: Arnaldo Carvalho de Melo

tools headers: Import asm-generic MMIO helpers

2025-08-27T18:14:06+00:00

Import the asm-generic MMIO helper functions from the kernel headers
into tools/include/. The top-level include is  which then
includes the arch-specific , which then includes
. This layout is chosen to match the kernel header
layout and to appease checkpatch.pl (which warns against including
 or  directly).

Changes made when importing:

 - Add missing includes at the top.
 - Stub out mmiowb_set_pending().
 - Stub out _THIS_IP_.
 - Stub out log_*_mmio() calls.
 - Drop the CONFIG_64BIT checks, since tools/include/linux/types.h
   always defines u64.

Acked-by: Shuah Khan 
Signed-off-by: David Matlack 
Link: https://lore.kernel.org/r/20250822212518.4156428-16-dmatlack@google.com
Signed-off-by: Alex Williamson

move asm/unaligned.h to linux/unaligned.h

2024-10-02T21:23:23+00:00

asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.

auto-generated by the following:

for i in `git grep -l -w asm/unaligned.h`; do
	sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
	sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h

bitops: Change function return types from long to int

2024-05-03T15:04:50+00:00

Change the return types of bitops functions (ffs, fls, and fns) from
long to int. The expected return values are in the range [0, 64], for
which int is sufficient.

Additionally, int aligns well with the return types of the corresponding
__builtin_* functions, potentially reducing overall type conversions.

Many of the existing bitops functions already return an int and don't
need to be changed. The bitops functions in arch/ should be considered
separately.

Adjust some return variables to match the function return types.

With GCC 13 and defconfig, these changes reduced the size of a test
kernel image by 5,432 bytes on arm64 and by 248 bytes on riscv; there
were no changes in size on x86_64, powerpc, or m68k.

Signed-off-by: Thorsten Blum 
Signed-off-by: Arnd Bergmann

tools/include: Sync asm-generic/bitops/fls.h with the kernel sources

2024-04-11T17:38:29+00:00

To pick up the changes from:

  cb4ede926134 ("riscv: Avoid code duplication with generic bitops implementation")

This should address these tools/perf build warnings:

  Warning: Kernel ABI header differences:
    diff -u tools/include/asm-generic/bitops/__fls.h include/asm-generic/bitops/__fls.h
    diff -u tools/include/asm-generic/bitops/fls.h include/asm-generic/bitops/fls.h

Cc: Arnd Bergmann 
Cc: Geert Uytterhoeven 
Cc: Palmer Dabbelt 
Cc: linux-arch@vger.kernel.org
Signed-off-by: Namhyung Kim 
Link: https://lore.kernel.org/r/20240408185520.1550865-9-namhyung@kernel.org

perf tools headers: update the asm-generic/unaligned.h copy with the kernel sources

2024-01-31T17:02:41+00:00

To pick up the changes in:

  1ab33c03145d0f6c ("asm-generic: make sparse happy with odd-sized put_unaligned_*()")

Addressing this perf tools build warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/asm-generic/unaligned.h include/asm-generic/unaligned.h

Cc: Adrian Hunter 
Cc: Dmitry Torokhov 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Linus Torvalds 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/lkml/Zbp9I7rmFj1Owhug@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

tools: Disable __packed attribute compiler warning due to -Werror=attributes

2023-11-22T20:23:27+00:00

Noticed on several perf tools cross build test containers:

  [perfbuilder@five ~]$ grep FAIL ~/dm.log/summary
    19    10.18 debian:experimental-x-mips    : FAIL gcc version 12.3.0 (Debian 12.3.0-6)
    20    11.21 debian:experimental-x-mips64  : FAIL gcc version 12.3.0 (Debian 12.3.0-6)
    21    11.30 debian:experimental-x-mipsel  : FAIL gcc version 12.3.0 (Debian 12.3.0-6)
    37    12.07 ubuntu:18.04-x-arm            : FAIL gcc version 7.5.0 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)
    42    11.91 ubuntu:18.04-x-riscv64        : FAIL gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
    44    13.17 ubuntu:18.04-x-sh4            : FAIL gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
    45    12.09 ubuntu:18.04-x-sparc64        : FAIL gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
  [perfbuilder@five ~]$

  In file included from util/intel-pt-decoder/intel-pt-pkt-decoder.c:10:
  /tmp/perf-6.6.0-rc1/tools/include/asm-generic/unaligned.h: In function 'get_unaligned_le16':
  /tmp/perf-6.6.0-rc1/tools/include/asm-generic/unaligned.h:13:29: error: packed attribute causes inefficient alignment for 'x' [-Werror=attributes]
     13 |         const struct { type x; } __packed *__pptr = (typeof(__pptr))(ptr);      \
        |                             ^
  /tmp/perf-6.6.0-rc1/tools/include/asm-generic/unaligned.h:27:28: note: in expansion of macro '__get_unaligned_t'
     27 |         return le16_to_cpu(__get_unaligned_t(__le16, p));
        |                            ^~~~~~~~~~~~~~~~~

This comes from the kernel, where the -Wattributes and -Wpacked isn't
used, -Wpacked is already disabled, do it for the attributes as well.

Fixes: a91c987254651443 ("perf tools: Add get_unaligned_leNN()")
Suggested-by: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/lkml/7c5b626c-1de9-4c12-a781-e44985b4a797@intel.com
Signed-off-by: Arnaldo Carvalho de Melo 
Signed-off-by: Namhyung Kim

perf tools: Add get_unaligned_leNN()

2023-10-17T19:40:02+00:00

Add get_unaligned_le16(), get_unaligned_le32 and get_unaligned_le64, same
as include/asm-generic/unaligned.h. And add include/asm-generic/unaligned.h
to check-headers.sh bringing tools/include/asm-generic/unaligned.h up to
date so that the kernel and tools versions match.

Use diagnostic pragmas to ignore -Wpacked used by perf build.

Signed-off-by: Adrian Hunter 
Reviewed-by: Ian Rogers 
Link: https://lore.kernel.org/r/20231005190451.175568-2-adrian.hunter@intel.com
Link: https://lore.kernel.org/r/20231010142234.20061-1-adrian.hunter@intel.com
[ squashed check-header.sh addition ]
Signed-off-by: Namhyung Kim

tools: KVM: selftests: Convert clear/set_bit() to actual atomics

2022-12-02T18:22:35+00:00

Convert {clear,set}_bit() to atomics as KVM's ucall implementation relies
on clear_bit() being atomic, they are defined in atomic.h, and the same
helpers in the kernel proper are atomic.

KVM's ucall infrastructure is the only user of clear_bit() in tools/, and
there are no true set_bit() users.  tools/testing/nvdimm/ does make heavy
use of set_bit(), but that code builds into a kernel module of sorts, i.e.
pulls in all of the kernel's header and so is already getting the kernel's
atomic set_bit().

Signed-off-by: Sean Christopherson 
Message-Id: <20221119013450.2643007-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini

tools: Drop "atomic_" prefix from atomic test_and_set_bit()

2022-12-02T18:22:34+00:00

Drop the "atomic_" prefix from tools' atomic_test_and_set_bit() to
match the kernel nomenclature where test_and_set_bit() is atomic,
and __test_and_set_bit() provides the non-atomic variant.

Signed-off-by: Sean Christopherson 
Message-Id: <20221119013450.2643007-9-seanjc@google.com>
Signed-off-by: Paolo Bonzini