X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fasm-v850%2Fatomic.h;h=166df00457eaeaf5f5bace956c1594b258f4b747;hb=6f91fe88e4e28b40b4f08d99e0ea6d17b70e9567;hp=395268a8c0dec1787fca9f39d29eab8df1d51797;hpb=8006fdd6dc387abaa4b683bda4868c879fd76070;p=linux-2.6

diff --git a/include/asm-v850/atomic.h b/include/asm-v850/atomic.h
index 395268a8c0..166df00457 100644
--- a/include/asm-v850/atomic.h
+++ b/include/asm-v850/atomic.h
@@ -90,10 +90,43 @@ 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;
+}
+
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
+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()
 #define smp_mb__before_atomic_inc()	barrier()
 #define smp_mb__after_atomic_inc()	barrier()
 
+#include <asm-generic/atomic.h>
 #endif /* __V850_ATOMIC_H__ */