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-rw-r--r--include/asm-arm26/atomic.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-arm26/atomic.h b/include/asm-arm26/atomic.h
index 4a88235c0e76..54b24ead7132 100644
--- a/include/asm-arm26/atomic.h
+++ b/include/asm-arm26/atomic.h
@@ -62,6 +62,20 @@ static inline int atomic_sub_return(int i, atomic_t *v)
62 return val; 62 return val;
63} 63}
64 64
65static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
66{
67 int ret;
68 unsigned long flags;
69
70 local_irq_save(flags);
71 ret = v->counter;
72 if (likely(ret == old))
73 v->counter = new;
74 local_irq_restore(flags);
75
76 return ret;
77}
78
65static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) 79static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
66{ 80{
67 unsigned long flags; 81 unsigned long flags;