diff --git a/[refs] b/[refs]
index bea8f687ec7f..6b70b893dd31 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4e9dc5df46001510ebd3b3e54faa650f474e51a3
+refs/heads/master: 3f380998aeb51b99d5d22cadb41162e1e9db70d2
diff --git a/trunk/mm/vmscan.c b/trunk/mm/vmscan.c
index 51bc4bf3f723..ac644fe85589 100644
--- a/trunk/mm/vmscan.c
+++ b/trunk/mm/vmscan.c
@@ -3520,8 +3520,8 @@ static ssize_t write_scan_unevictable_node(struct sys_device *dev,
 	unsigned long res;
 	unsigned long req = strict_strtoul(buf, 10, &res);
 
-	if (!req)
-		return 1;	/* zero is no-op */
+	if (req || !res)
+		return 1; /* Invalid input or zero is no-op */
 
 	for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) {
 		if (!populated_zone(zone))