diff options
| -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 169c223a845..c954f15c1a7 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)) |