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[PATCH] x86_64: Correct wrong comment in local.h

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local_t is actually a win over atomic_t because it does not need lock
prefixes.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2005-04-16 15:25:08 -07:00 committed by Linus Torvalds
parent 72e76be2fe
commit 1c1734090e
1 changed files with 2 additions and 1 deletions
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3
include/asm-x86_64/local.h
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@ -45,7 +45,8 @@ static __inline__ void local_sub(unsigned long i, local_t *v)
:"ir" (i), "m" (v->counter));
}
/* On x86, these are no better than the atomic variants. */
/* On x86-64 these are better than the atomic variants on SMP kernels
because they dont use a lock prefix. */
#define __local_inc(l) local_inc(l)
#define __local_dec(l) local_dec(l)
#define __local_add(i,l) local_add((i),(l))