diff --git a/fs/nilfs2/dat.c b/fs/nilfs2/dat.c
index ab04a68..49c844d 100644
--- a/fs/nilfs2/dat.c
+++ b/fs/nilfs2/dat.c
@@ -103,7 +103,8 @@
 	nilfs_palloc_abort_alloc_entry(dat, req);
 }
 
-void nilfs_dat_commit_free(struct inode *dat, struct nilfs_palloc_req *req)
+static void nilfs_dat_commit_free(struct inode *dat,
+				  struct nilfs_palloc_req *req)
 {
 	struct nilfs_dat_entry *entry;
 	void *kaddr;
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 8e77016..ab62907 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -68,7 +68,7 @@
 		   "(NILFS)");
 MODULE_LICENSE("GPL");
 
-struct kmem_cache *nilfs_inode_cachep;
+static struct kmem_cache *nilfs_inode_cachep;
 struct kmem_cache *nilfs_transaction_cachep;
 struct kmem_cache *nilfs_segbuf_cachep;
 struct kmem_cache *nilfs_btree_path_cache;