frv: missing casts in cmpxchg()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/asm-frv/system.h b/include/asm-frv/system.h
index 6931af5..9f5663b 100644
--- a/include/asm-frv/system.h
+++ b/include/asm-frv/system.h
@@ -253,7 +253,10 @@
 	__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");						\