diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 6853722..754c0d3 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1088,7 +1088,7 @@
  * then we have to correct all indexes above.
  * TODO: do we need to correct tree in all cases?
  */
-int ext4_ext_correct_indexes(handle_t *handle, struct inode *inode,
+static int ext4_ext_correct_indexes(handle_t *handle, struct inode *inode,
 				struct ext4_ext_path *path)
 {
 	struct ext4_extent_header *eh;
@@ -1535,7 +1535,7 @@
  * It's used in truncate case only, thus all requests are for
  * last index in the block only.
  */
-int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
+static int ext4_ext_rm_idx(handle_t *handle, struct inode *inode,
 			struct ext4_ext_path *path)
 {
 	struct buffer_head *bh;
@@ -1806,7 +1806,7 @@
 	return 1;
 }
 
-int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start)
+static int ext4_ext_remove_space(struct inode *inode, ext4_lblk_t start)
 {
 	struct super_block *sb = inode->i_sb;
 	int depth = ext_depth(inode);