Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband

[powerpc.git] / include / asm-v850 / atomic.h

diff --git a/include/asm-v850/atomic.h b/include/asm-v850/atomic.h
index 395268a..bede317 100644 (file)
--- a/include/asm-v850/atomic.h
+++ b/include/asm-v850/atomic.h
@@ -90,6 +90,36 @@ static __inline__ void atomic_clear_mask (unsigned long mask, unsigned long *add
 #define atomic_dec_and_test(v)         (atomic_sub_return (1, (v)) == 0)
 #define atomic_add_negative(i,v)       (atomic_add_return ((i), (v)) < 0)
 
+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 int atomic_add_unless(atomic_t *v, int a, int u)
+{
+       int ret;
+       unsigned long flags;
+
+       local_irq_save(flags);
+       ret = v->counter;
+       if (ret != u)
+               v->counter += a;
+       local_irq_restore(flags);
+
+       return ret != u;
+}
+
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
 /* Atomic operations are already serializing on ARM */
 #define smp_mb__before_atomic_dec()    barrier()
 #define smp_mb__after_atomic_dec()     barrier()