[PATCH] autofs4: expire code readability cleanup

[linux-2.6-omap-h63xx.git] / include / asm-sparc64 / atomic.h

diff --git a/include/asm-sparc64/atomic.h b/include/asm-sparc64/atomic.h
index 3789fe3159923ef5bbe8bc6bad873b5b851bf78d..468eb48d814246e0b793b900d459b0ad51422cd6 100644 (file)
--- a/include/asm-sparc64/atomic.h
+++ b/include/asm-sparc64/atomic.h
@@ -72,14 +72,21 @@ extern int atomic64_sub_ret(int, atomic64_t *);
 #define atomic64_add_negative(i, v) (atomic64_add_ret(i, v) < 0)
 
 #define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
 
 #define atomic_add_unless(v, a, 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;                                        \
-       c != (u);                                               \
+       }                                                       \
+       likely(c != (u));                                       \
 })
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
@@ -96,4 +103,5 @@ extern int atomic64_sub_ret(int, atomic64_t *);
 #define smp_mb__after_atomic_inc()     barrier()
 #endif
 
+#include <asm-generic/atomic.h>
 #endif /* !(__ARCH_SPARC64_ATOMIC__) */