X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Fasm-cris%2Fatomic.h;h=683b05a57d88068527bea8d99343c2425503318c;hb=8426e1f6af0fd7f44d040af7263750c5a52f3cc3;hp=45891f7de00fc1c58a9bcc48158c75dc2a386746;hpb=4a6dae6d382e9edf3ff440b819e554ed706359bc;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/asm-cris/atomic.h b/include/asm-cris/atomic.h
index 45891f7d..683b05a 100644
--- a/include/asm-cris/atomic.h
+++ b/include/asm-cris/atomic.h
@@ -136,6 +136,20 @@ 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;
+
+	cris_atomic_save(v, flags);
+	ret = v->counter;
+	if (ret != u)
+		v->counter += a;
+	cris_atomic_restore(v, flags);
+	return ret != u;
+}
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
 /* Atomic operations are already serializing */
 #define smp_mb__before_atomic_dec()    barrier()
 #define smp_mb__after_atomic_dec()     barrier()