diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index ad3aa7ac59a71f6f1d6a8cfd21acf86e1e32df20..dfc55fae65563e08e3f83777cae3f01e0e6c5754 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -57,15 +57,12 @@ static int set_migratetype_isolate(struct page *page, int migratetype, int isol_
 	spin_unlock_irqrestore(&zone->lock, flags);
 	if (!ret) {
 		drain_all_pages(zone);
-	} else {
-		WARN_ON_ONCE(zone_idx(zone) == ZONE_MOVABLE);
-
-		if ((isol_flags & REPORT_FAILURE) && unmovable)
-			/*
-			 * printk() with zone->lock held will likely trigger a
-			 * lockdep splat, so defer it here.
-			 */
-			dump_page(unmovable, "unmovable page");
+	} else if ((isol_flags & REPORT_FAILURE) && unmovable) {
+		/*
+		 * printk() with zone->lock held will likely trigger a
+		 * lockdep splat, so defer it here.
+		 */
+		dump_page(unmovable, "unmovable page");
 	}
 
 	return ret;