diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 286d015aab8e..ae4711d17f5f 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1826,7 +1826,7 @@ static void remove_free_nid(struct f2fs_sb_info *sbi, nid_t nid)
 		kmem_cache_free(free_nid_slab, i);
 }
 
-void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid, bool set)
+static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid, bool set)
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	unsigned int nat_ofs = NAT_BLOCK_OFFSET(nid);
@@ -2641,7 +2641,7 @@ static int init_node_manager(struct f2fs_sb_info *sbi)
 	return 0;
 }
 
-int init_free_nid_cache(struct f2fs_sb_info *sbi)
+static int init_free_nid_cache(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_nm_info *nm_i = NM_I(sbi);