Commit ab8aaab8 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

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

To pick up the changes in:

  947697c6 ("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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c964ced7

tools/include/uapi/linux/const.h

+17 −0
Original line number Diff line number Diff line
@@ -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))