diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h
index 6931af525da3201873274337a993d342d2c9b14b..9f5663ba19f8eaad3ee4680d81894b18b1748ba0 100644
--- a/include/asm-frv/system.h
+++ b/include/asm-frv/system.h
@@ -253,7 +253,10 @@ extern uint32_t __cmpxchg_32(uint32_t *v, uint32_t test, uint32_t new);
 	__typeof__(*(ptr)) __xg_new = (new);					\
 										\
 	switch (sizeof(__xg_orig)) {						\
-	case 4: __xg_orig = __cmpxchg_32(__xg_ptr, __xg_test, __xg_new); break;	\
+	case 4: __xg_orig = (__force __typeof__(*ptr))				\
+			__cmpxchg_32((__force uint32_t *)__xg_ptr,		\
+					 (__force uint32_t)__xg_test,		\
+					 (__force uint32_t)__xg_new); break;	\
 	default:								\
 		__xg_orig = 0;							\
 		asm volatile("break");						\