diff options
Diffstat (limited to 'include/asm-m68k')
-rw-r--r-- | include/asm-m68k/atomic.h | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h index d5eed64cb833..4915294fea63 100644 --- a/include/asm-m68k/atomic.h +++ b/include/asm-m68k/atomic.h | |||
@@ -2,7 +2,7 @@ | |||
2 | #define __ARCH_M68K_ATOMIC__ | 2 | #define __ARCH_M68K_ATOMIC__ |
3 | 3 | ||
4 | 4 | ||
5 | #include <asm/system.h> /* local_irq_XXX() */ | 5 | #include <asm/system.h> |
6 | 6 | ||
7 | /* | 7 | /* |
8 | * Atomic operations that C can't guarantee us. Useful for | 8 | * Atomic operations that C can't guarantee us. Useful for |
@@ -170,20 +170,21 @@ static inline void atomic_set_mask(unsigned long mask, unsigned long *v) | |||
170 | __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask)); | 170 | __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask)); |
171 | } | 171 | } |
172 | 172 | ||
173 | #define atomic_add_unless(v, a, u) \ | 173 | static __inline__ int atomic_add_unless(atomic_t *v, int a, int u) |
174 | ({ \ | 174 | { |
175 | int c, old; \ | 175 | int c, old; |
176 | c = atomic_read(v); \ | 176 | c = atomic_read(v); |
177 | for (;;) { \ | 177 | for (;;) { |
178 | if (unlikely(c == (u))) \ | 178 | if (unlikely(c == (u))) |
179 | break; \ | 179 | break; |
180 | old = atomic_cmpxchg((v), c, c + (a)); \ | 180 | old = atomic_cmpxchg((v), c, c + (a)); |
181 | if (likely(old == c)) \ | 181 | if (likely(old == c)) |
182 | break; \ | 182 | break; |
183 | c = old; \ | 183 | c = old; |
184 | } \ | 184 | } |
185 | c != (u); \ | 185 | return c != (u); |
186 | }) | 186 | } |
187 | |||
187 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | 188 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) |
188 | 189 | ||
189 | /* Atomic operations are already serializing */ | 190 | /* Atomic operations are already serializing */ |