diff --git a/[refs] b/[refs]
index 0aa088e372c2..0c0e89686851 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7553e8f2d5161a2b7a9b7a9f37be1b77e735552f
+refs/heads/master: f957db4fcdd8f03e186aa8f041f4049e76ab741c
diff --git a/trunk/mm/memory_hotplug.c b/trunk/mm/memory_hotplug.c
index 78dba9f04b5b..c46887b5a11e 100644
--- a/trunk/mm/memory_hotplug.c
+++ b/trunk/mm/memory_hotplug.c
@@ -498,7 +498,9 @@ static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start)
 	 * The node we allocated has no zone fallback lists. For avoiding
 	 * to access not-initialized zonelist, build here.
 	 */
+	mutex_lock(&zonelists_mutex);
 	build_all_zonelists(NULL);
+	mutex_unlock(&zonelists_mutex);
 
 	return pgdat;
 }