diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index ffd162abbe5e40c90f3e428e27ea0cf53a61a03b..39da954b5059f19cf803ea6e8d3728188c57ad1d 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1287,7 +1287,7 @@ static int kmemleak_scan_thread(void *arg)
  * Start the automatic memory scanning thread. This function must be called
  * with the scan_mutex held.
  */
-void start_scan_thread(void)
+static void start_scan_thread(void)
 {
 	if (scan_thread)
 		return;
@@ -1302,7 +1302,7 @@ void start_scan_thread(void)
  * Stop the automatic memory scanning thread. This function must be called
  * with the scan_mutex held.
  */
-void stop_scan_thread(void)
+static void stop_scan_thread(void)
 {
 	if (scan_thread) {
 		kthread_stop(scan_thread);