ck_pr: Cast down to void pointer for cmpxchg16b wrapper.

include/gcc/x86_64/ck_pr.h

@@ -174,7 +174,7 @@ ck_pr_load_ptr_2(void *t, void *v)
 	CK_CC_INLINE static void						\
 	ck_pr_load_##S##_##W(T t[2], T v[2])					\
 	{									\
-		ck_pr_load_64_2((uint64_t *)t, (uint64_t *)v);	\
+		ck_pr_load_64_2((uint64_t *)(void *)t, (uint64_t *)(void *)v);	\
 		return;								\
 	}
 
@@ -469,17 +469,17 @@ ck_pr_cas_ptr_2_value(void *t, void *c, void *s, void *v)
 CK_CC_INLINE static bool					\
 ck_pr_cas_##S##_##W(T t[W], T c[W], T s[W])			\
 {								\
-	return ck_pr_cas_64_2((uint64_t *)t,		\
-			      (uint64_t *)c,		\
-			      (uint64_t *)s);		\
+	return ck_pr_cas_64_2((uint64_t *)(void *)t,		\
+			      (uint64_t *)(void *)c,		\
+			      (uint64_t *)(void *)s);		\
 }								\
 CK_CC_INLINE static bool					\
 ck_pr_cas_##S##_##W##_value(T *t, T c[W], T s[W], T *v)		\
 {								\
-	return ck_pr_cas_64_2_value((uint64_t *)t,	\
-				    (uint64_t *)c,	\
-				    (uint64_t *)s,	\
-				    (uint64_t *)v);	\
+	return ck_pr_cas_64_2_value((uint64_t *)(void *)t,	\
+				    (uint64_t *)(void *)c,	\
+				    (uint64_t *)(void *)s,	\
+				    (uint64_t *)(void *)v);	\
 }
 
 CK_PR_CAS_V(double, 2, double)