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| author | Andi Kleen <ak@suse.de> | 2005-04-16 22:25:08 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:25:08 (GMT) |
| commit | 1c1734090ebcd31e479798b3af4c260ae09bf3a4 (patch) | |
| tree | de5f3374bfb56c0e5a4527b3b0127face20eca3f | |
| parent | 72e76be2fedb4db320a4855d870f731c1242a9d3 (diff) | |
| download | linux-1c1734090ebcd31e479798b3af4c260ae09bf3a4.tar.xz | |
[PATCH] x86_64: Correct wrong comment in local.h
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>
| -rw-r--r-- | include/asm-x86_64/local.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-x86_64/local.h b/include/asm-x86_64/local.h index 169c223..c954f15 100644 --- a/include/asm-x86_64/local.h +++ b/include/asm-x86_64/local.h @@ -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)) |