[PATCH] fix build error in atomic64_cmpxchg

[Atsushi Nemoto <anemo@mba.ocn.ne.jp>]

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
diff --git a/include/asm-mips/atomic.h b/include/asm-mips/atomic.h
index 62daa74..1b60624 100644
--- a/include/asm-mips/atomic.h
+++ b/include/asm-mips/atomic.h
@@ -689,7 +689,7 @@ static __inline__ long atomic64_sub_if_positive(long i, 
atomic64_t * v)
 }
 
 #define atomic64_cmpxchg(v, o, n) \
-       (((__typeof__((v)->counter)))cmpxchg(&((v)->counter), (o), (n)))
+       ((__typeof__((v)->counter))cmpxchg(&((v)->counter), (o), (n)))
 #define atomic64_xchg(v, new) (xchg(&((v)->counter), (new)))
 
 /**