diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d9fbac1..265fea4fb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1394,21 +1394,22 @@
 
 	zone = page_zone(page);
 	order = page_order(page);
+	mt = get_pageblock_migratetype(page);
 
-	/* Obey watermarks as if the page was being allocated */
-	watermark = low_wmark_pages(zone) + (1 << order);
-	if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
-		return 0;
+	if (mt != MIGRATE_ISOLATE) {
+		/* Obey watermarks as if the page was being allocated */
+		watermark = low_wmark_pages(zone) + (1 << order);
+		if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
+			return 0;
+
+		__mod_zone_freepage_state(zone, -(1UL << alloc_order), mt);
+	}
 
 	/* Remove page from free list */
 	list_del(&page->lru);
 	zone->free_area[order].nr_free--;
 	rmv_page_order(page);
 
-	mt = get_pageblock_migratetype(page);
-	if (unlikely(mt != MIGRATE_ISOLATE))
-		__mod_zone_freepage_state(zone, -(1UL << alloc_order), mt);
-
 	if (alloc_order != order)
 		expand(zone, page, alloc_order, order,
 			&zone->free_area[order], migratetype);