X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-x86_64%2Fatomic.h;h=4b5cd553e772637d157b0af95edbd89d7e12eb1a;hb=987b0145d94eecf292d8b301228356f44611ab7c;hp=cecbf7baa6aa346297efa3bb14480bddd5e4236a;hpb=f7ed79d23a47594e7834d66a8f14449796d4f3e6;p=linux-2.6.git

diff --git a/include/asm-x86_64/atomic.h b/include/asm-x86_64/atomic.h
index cecbf7baa..4b5cd553e 100644
--- a/include/asm-x86_64/atomic.h
+++ b/include/asm-x86_64/atomic.h
@@ -405,14 +405,8 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t *v)
 ({								\
 	int c, old;						\
 	c = atomic_read(v);					\
-	for (;;) {						\
-		if (unlikely(c == (u)))				\
-			break;					\
-		old = atomic_cmpxchg((v), c, c + (a));		\
-		if (likely(old == c))				\
-			break;					\
+	while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
 		c = old;					\
-	}							\
 	c != (u);						\
 })
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)