mm: memcontrol: uninitialized "ret" variables

index 323a01f..7af7834 100644
@@ -3422,7 +3422,7 @@ static ssize_t mem_cgroup_write(struct kernfs_open_file *of,
 {
 	struct mem_cgroup *memcg = mem_cgroup_from_css(of_css(of));
 	unsigned long nr_pages;
-	int ret;
+	int ret = 0;
 
 	buf = strstrip(buf);
 	if (!strcmp(buf, "-1")) {

@@ -3799,7 +3799,8 @@ static int __mem_cgroup_usage_register_event(struct mem_cgroup *memcg,
 	struct mem_cgroup_threshold_ary *new;
 	unsigned long threshold;
 	unsigned long usage;
-	int i, size, ret;
+	int i, size;
+	int ret = 0;
 
 	if (!strcmp(args, "-1")) {
 		threshold = PAGE_COUNTER_MAX;