xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

compiler.h: add support for function attribute assume_aligned

Browse Source 
gcc 4.9 added the function attribute assume_aligned, indicating to the
caller that the returned pointer may be assumed to have a certain minimal
alignment.  This is useful if, for example, the return value is passed to
memset().  Add a shorthand macro for that.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rasmus Villemoes
2015-11-05 18:45:02 -08:00
committed by Linus Torvalds
parent fda901241f
commit a744fd17b5
2 changed files with 25 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/linux/compiler.h
View File

@@ -417,6 +417,14 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
#define __visible
#endif
/*
* Assume alignment of return value.
*/
#ifndef __assume_aligned
#define __assume_aligned(a, ...)
#endif
/* Are two types/vars the same type (ignoring qualifiers)? */
#ifndef __same_type
# define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))