atomic.h: atomic_add_unless as inline. Remove system.h atomic.h circular dependency
[linux-2.6.git] / include / asm-xtensa / atomic.h
index 5c2672021068670758d9d9d3d4f8ef30abaa5705..b3b23540f14d2c5087e4b8d09d519378e73e726a 100644 (file)
@@ -234,14 +234,21 @@ static inline int atomic_sub_return(int i, atomic_t * v)
  * Atomically adds @a to @v, so long as it was not @u.
  * Returns non-zero if @v was not @u, and zero otherwise.
  */
-#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) \
-               c = old;                                        \
-       c != (u);                                               \
-})
+static __inline__ int atomic_add_unless(atomic_t *v, int a, int 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;
+       }
+       return c != (u);
+}
+
 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
 
 static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)