diff --git a/kernel-shared/ctree.h b/kernel-shared/ctree.h
index 7761b3f6..b8f7a19b 100644
--- a/kernel-shared/ctree.h
+++ b/kernel-shared/ctree.h
@@ -1210,7 +1210,7 @@ int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
 			     struct btrfs_root *root, u64 ino, u64 flags);
 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		   u64 ino, u64 parent_ino, char *name, int namelen,
+		   u64 ino, u64 parent_ino, const char *name, int namelen,
 		   u8 type, u64 *index, int add_backref, int ignore_existed);
 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		 u64 ino, u64 parent_ino, u64 index, const char *name,
diff --git a/kernel-shared/inode.c b/kernel-shared/inode.c
index 5927af04..265d6298 100644
--- a/kernel-shared/inode.c
+++ b/kernel-shared/inode.c
@@ -167,7 +167,7 @@ out:
  * Currently only supports adding link from an inode to another inode.
  */
 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		   u64 ino, u64 parent_ino, char *name, int namelen,
+		   u64 ino, u64 parent_ino, const char *name, int namelen,
 		   u8 type, u64 *index, int add_backref, int ignore_existed)
 {
 	struct btrfs_path *path;