diff options
Diffstat (limited to 'include/asm-m68knommu/atomic.h')
| -rw-r--r-- | include/asm-m68knommu/atomic.h | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/include/asm-m68knommu/atomic.h b/include/asm-m68knommu/atomic.h index 6c4e4b63e45..d5632a305da 100644 --- a/include/asm-m68knommu/atomic.h +++ b/include/asm-m68knommu/atomic.h @@ -1,7 +1,7 @@ #ifndef __ARCH_M68KNOMMU_ATOMIC__ #define __ARCH_M68KNOMMU_ATOMIC__ -#include <asm/system.h> /* local_irq_XXX() */ +#include <asm/system.h> /* * Atomic operations that C can't guarantee us. Useful for @@ -131,14 +131,21 @@ static inline int atomic_sub_return(int i, atomic_t * v) #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); \ - 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) #define atomic_dec_return(v) atomic_sub_return(1,(v)) |