diff --git a/mm/migrate.c b/mm/migrate.c
index 11d89dc..41eba21 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1599,7 +1599,8 @@
 }
 
 /* Returns true if the node is migrate rate-limited after the update */
-bool numamigrate_update_ratelimit(pg_data_t *pgdat, unsigned long nr_pages)
+static bool numamigrate_update_ratelimit(pg_data_t *pgdat,
+					unsigned long nr_pages)
 {
 	bool rate_limited = false;
 
@@ -1623,7 +1624,7 @@
 	return rate_limited;
 }
 
-int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
+static int numamigrate_isolate_page(pg_data_t *pgdat, struct page *page)
 {
 	int page_lru;