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-rw-r--r--include/asm-i386/atomic.h29
1 files changed, 15 insertions, 14 deletions
diff --git a/include/asm-i386/atomic.h b/include/asm-i386/atomic.h
index 08935113206a..ff90c6e3fcb4 100644
--- a/include/asm-i386/atomic.h
+++ b/include/asm-i386/atomic.h
@@ -219,20 +219,21 @@ static __inline__ int atomic_sub_return(int i, atomic_t *v)
219 * Atomically adds @a to @v, so long as @v was not already @u. 219 * Atomically adds @a to @v, so long as @v was not already @u.
220 * Returns non-zero if @v was not @u, and zero otherwise. 220 * Returns non-zero if @v was not @u, and zero otherwise.
221 */ 221 */
222#define atomic_add_unless(v, a, u) \ 222static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
223({ \ 223{
224 __typeof__((v)->counter) c, old; \ 224 int c, old;
225 c = atomic_read(v); \ 225 c = atomic_read(v);
226 for (;;) { \ 226 for (;;) {
227 if (unlikely(c == (u))) \ 227 if (unlikely(c == (u)))
228 break; \ 228 break;
229 old = atomic_cmpxchg((v), c, c + (a)); \ 229 old = atomic_cmpxchg((v), c, c + (a));
230 if (likely(old == c)) \ 230 if (likely(old == c))
231 break; \ 231 break;
232 c = old; \ 232 c = old;
233 } \ 233 }
234 c != (u); \ 234 return c != (u);
235}) 235}
236
236#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) 237#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
237 238
238#define atomic_inc_return(v) (atomic_add_return(1,v)) 239#define atomic_inc_return(v) (atomic_add_return(1,v))