--- arch/x86/include/asm/cmpxchg.h	2013-03-18 13:06:40.961286426 +0200
+++ /root/cmpxchg.h	2013-03-18 13:03:43.613301104 +0200
@@ -83,8 +83,8 @@ extern void __add_wrong_size(void)
 #define __raw_cmpxchg(ptr, old, new, size, lock)			\
 ({									\
 	__typeof__(*(ptr)) __ret;					\
-	__typeof__(*(ptr)) __old = (old);				\
-	__typeof__(*(ptr)) __new = (new);				\
+	__typeof__(*(ptr)) __old = (__typeof__(*(ptr)))(old);				\
+	__typeof__(*(ptr)) __new = (__typeof__(*(ptr)))(new);				\
 	switch (size) {							\
 	case __X86_CASE_B:						\
 	{								\