diff options
Diffstat (limited to 'include/asm-m68knommu/atomic.h')
| -rw-r--r-- | include/asm-m68knommu/atomic.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/include/asm-m68knommu/atomic.h b/include/asm-m68knommu/atomic.h index b1957fba083..3c1cc153c41 100644 --- a/include/asm-m68knommu/atomic.h +++ b/include/asm-m68knommu/atomic.h @@ -100,7 +100,7 @@ static __inline__ void atomic_set_mask(unsigned long mask, unsigned long *v) #define smp_mb__before_atomic_inc() barrier() #define smp_mb__after_atomic_inc() barrier() -extern __inline__ int atomic_add_return(int i, atomic_t * v) +static inline int atomic_add_return(int i, atomic_t * v) { unsigned long temp, flags; @@ -115,7 +115,7 @@ extern __inline__ int atomic_add_return(int i, atomic_t * v) #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) -extern __inline__ int atomic_sub_return(int i, atomic_t * v) +static inline int atomic_sub_return(int i, atomic_t * v) { unsigned long temp, flags; @@ -128,6 +128,18 @@ extern __inline__ int atomic_sub_return(int i, atomic_t * v) return temp; } +#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n))) + +#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); \ +}) +#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) + #define atomic_dec_return(v) atomic_sub_return(1,(v)) #define atomic_inc_return(v) atomic_add_return(1,(v)) |