diff options
Diffstat (limited to 'include/asm-i386/atomic.h')
-rw-r--r-- | include/asm-i386/atomic.h | 29 |
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) \ | 222 | static __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)) |