diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9b04cf5ea813851010aab93035d97f743e1f2894..7fbb32b0b0414221a9bd8e92196470dbfebab05b 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1071,7 +1071,7 @@ static void __meminit resize_pgdat_range(struct pglist_data *pgdat, unsigned lon
 	pgdat->node_spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - pgdat->node_start_pfn;
 }
 
-void move_pfn_range_to_zone(struct zone *zone,
+void __ref move_pfn_range_to_zone(struct zone *zone,
 		unsigned long start_pfn, unsigned long nr_pages)
 {
 	struct pglist_data *pgdat = zone->zone_pgdat;