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tools headers UAPI: Sync linux/const.h with the kernel headers

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To pick up the changes in:

  947697c6f0 ("uapi: Define GENMASK_U128")

That causes no changes in tooling, just addresses this perf build
warning:

  Warning: Kernel ABI header differences:
    diff -u tools/include/uapi/linux/const.h include/uapi/linux/const.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/lkml/ZwltGNJwujKu1Fgn@x1
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2024-10-11 15:20:17 -03:00
parent c964ced772
commit ab8aaab874
1 changed files with 17 additions and 0 deletions
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17
tools/include/uapi/linux/const.h
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@ -28,6 +28,23 @@
#define _BITUL(x) (_UL(1) << (x))
#define _BITULL(x) (_ULL(1) << (x))
#if !defined(__ASSEMBLY__)
/*
* Missing asm support
*
* __BIT128() would not work in the asm code, as it shifts an
* 'unsigned __init128' data type as direct representation of
* 128 bit constants is not supported in the gcc compiler, as
* they get silently truncated.
*
* TODO: Please revisit this implementation when gcc compiler
* starts representing 128 bit constants directly like long
* and unsigned long etc. Subsequently drop the comment for
* GENMASK_U128() which would then start supporting asm code.
*/
#define _BIT128(x) ((unsigned __int128)(1) << (x))
#endif
#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (__typeof__(x))(a) - 1)
#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))