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-rw-r--r--include/asm-h8300/atomic.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-h8300/atomic.h b/include/asm-h8300/atomic.h
index d5043925949..f23d86819ea 100644
--- a/include/asm-h8300/atomic.h
+++ b/include/asm-h8300/atomic.h
@@ -95,6 +95,20 @@ static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
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)
+
static __inline__ void atomic_clear_mask(unsigned long mask, unsigned long *v)
{
__asm__ __volatile__("stc ccr,r1l\n\t"