X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-s390%2Fatomic.h;h=399bf02894dd10cf5fc320557484eb0fcb27f7cd;hb=00e5edcbfdb7030f6cbb8d5d89fdc2848133a182;hp=be6fefe223d614e6326c6f210a61a20caa51d0aa;hpb=0a0fc0ddbe732779366ab6b1b879f62195e65967;p=linux-2.6

diff --git a/include/asm-s390/atomic.h b/include/asm-s390/atomic.h
index be6fefe223..399bf02894 100644
--- a/include/asm-s390/atomic.h
+++ b/include/asm-s390/atomic.h
@@ -1,6 +1,8 @@
 #ifndef __ARCH_S390_ATOMIC__
 #define __ARCH_S390_ATOMIC__
 
+#include <linux/compiler.h>
+
 /*
  *  include/asm-s390/atomic.h
  *
@@ -89,10 +91,15 @@ static __inline__ int atomic_cmpxchg(atomic_t *v, int old, int new)
 static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
 {
 	int c, old;
-
 	c = atomic_read(v);
-	while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c)
+	for (;;) {
+		if (unlikely(c == u))
+			break;
+		old = atomic_cmpxchg(v, c, c + a);
+		if (likely(old == c))
+			break;
 		c = old;
+	}
 	return c != u;
 }
 
@@ -167,10 +174,15 @@ static __inline__ int atomic64_add_unless(atomic64_t *v,
 					  long long a, long long u)
 {
 	long long c, old;
-
 	c = atomic64_read(v);
-	while (c != u && (old = atomic64_cmpxchg(v, c, c + a)) != c)
+	for (;;) {
+		if (unlikely(c == u))
+			break;
+		old = atomic64_cmpxchg(v, c, c + a);
+		if (likely(old == c))
+			break;
 		c = old;
+	}
 	return c != u;
 }