[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>
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@ -45,7 +45,8 @@ static __inline__ void local_sub(unsigned long i, local_t *v)
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:"ir" (i), "m" (v->counter));
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}
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/* On x86, these are no better than the atomic variants. */
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/* On x86-64 these are better than the atomic variants on SMP kernels
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because they dont use a lock prefix. */
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#define __local_inc(l) local_inc(l)
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#define __local_dec(l) local_dec(l)
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#define __local_add(i,l) local_add((i),(l))
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