Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

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

diff --git a/include/asm-sparc64/atomic.h b/include/asm-sparc64/atomic.h
index d80f337..468eb48 100644 (file)
--- a/include/asm-sparc64/atomic.h
+++ b/include/asm-sparc64/atomic.h
@@ -54,6 +54,7 @@ extern int atomic64_sub_ret(int, atomic64_t *);
  * other cases.
  */
 #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
+#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0)
 
 #define atomic_sub_and_test(i, v) (atomic_sub_ret(i, v) == 0)
 #define atomic64_sub_and_test(i, v) (atomic64_sub_ret(i, v) == 0)
@@ -70,12 +71,31 @@ extern int atomic64_sub_ret(int, atomic64_t *);
 #define atomic_add_negative(i, v) (atomic_add_ret(i, v) < 0)
 #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);                                     \
+       for (;;) {                                              \
+               if (unlikely(c == (u)))                         \
+                       break;                                  \
+               old = atomic_cmpxchg((v), c, c + (a));          \
+               if (likely(old == c))                           \
+                       break;                                  \
+               c = old;                                        \
+       }                                                       \
+       likely(c != (u));                                       \
+})
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
 /* Atomic operations are already serializing */
 #ifdef CONFIG_SMP
-#define smp_mb__before_atomic_dec()    membar("#StoreLoad | #LoadLoad")
-#define smp_mb__after_atomic_dec()     membar("#StoreLoad | #StoreStore")
-#define smp_mb__before_atomic_inc()    membar("#StoreLoad | #LoadLoad")
-#define smp_mb__after_atomic_inc()     membar("#StoreLoad | #StoreStore")
+#define smp_mb__before_atomic_dec()    membar_storeload_loadload();
+#define smp_mb__after_atomic_dec()     membar_storeload_storestore();
+#define smp_mb__before_atomic_inc()    membar_storeload_loadload();
+#define smp_mb__after_atomic_inc()     membar_storeload_storestore();
 #else
 #define smp_mb__before_atomic_dec()    barrier()
 #define smp_mb__after_atomic_dec()     barrier()
@@ -83,4 +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__) */