diff --git a/mm/slub.c b/mm/slub.c
index 2ae2dae..b1635f9 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -233,7 +233,7 @@
 
 /* A list of all slab caches on the system */
 static DECLARE_RWSEM(slub_lock);
-LIST_HEAD(slab_caches);
+static LIST_HEAD(slab_caches);
 
 /*
  * Tracking user of a slab.
@@ -3638,7 +3638,7 @@
 	.filter = uevent_filter,
 };
 
-decl_subsys(slab, &slab_ktype, &slab_uevent_ops);
+static decl_subsys(slab, &slab_ktype, &slab_uevent_ops);
 
 #define ID_STR_LENGTH 64
 
@@ -3736,7 +3736,7 @@
 	struct saved_alias *next;
 };
 
-struct saved_alias *alias_list;
+static struct saved_alias *alias_list;
 
 static int sysfs_slab_alias(struct kmem_cache *s, const char *name)
 {