summaryrefslogtreecommitdiff
path: root/include/linux/compiler.h
diff options
context:
space:
mode:
authorRasmus Villemoes <linux@rasmusvillemoes.dk>2015-11-06 05:45:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-06 06:34:48 +0300
commita744fd17b5233360681ce03e43804406745b680b (patch)
tree3b7600477b108469dd2e435e32d861100e559dce /include/linux/compiler.h
parentfda901241fb89449244537db4fb27b06e491b74f (diff)
downloadlinux-a744fd17b5233360681ce03e43804406745b680b.tar.xz
compiler.h: add support for function attribute assume_aligned
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>
Diffstat (limited to 'include/linux/compiler.h')
-rw-r--r--include/linux/compiler.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 52a459ff75f4..4dac1036594f 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -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))