diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index b1447522d346..eb19ba8396c3 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5502,10 +5502,8 @@ int set_migratetype_isolate(struct page *page)
 	struct memory_isolate_notify arg;
 	int notifier_ret;
 	int ret = -EBUSY;
-	int zone_idx;
 
 	zone = page_zone(page);
-	zone_idx = zone_idx(zone);
 
 	spin_lock_irqsave(&zone->lock, flags);