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)
         return val;
 }
 
+static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
+{
+        int ret;
+        unsigned long flags;
+
+        local_irq_save(flags);
+        ret = v->counter;
+        if (likely(ret == old))
+                v->counter = new;
+        local_irq_restore(flags);
+
+        return ret;
+}
+
 static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
 {
         unsigned long flags;