diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 4cccba2..a695810 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -21,11 +21,11 @@
 #define BTRFS_BDEV_BLOCKSIZE	(4096)
 
 enum btrfs_wq_endio_type {
-	BTRFS_WQ_ENDIO_DATA = 0,
-	BTRFS_WQ_ENDIO_METADATA = 1,
-	BTRFS_WQ_ENDIO_FREE_SPACE = 2,
-	BTRFS_WQ_ENDIO_RAID56 = 3,
-	BTRFS_WQ_ENDIO_DIO_REPAIR = 4,
+	BTRFS_WQ_ENDIO_DATA,
+	BTRFS_WQ_ENDIO_METADATA,
+	BTRFS_WQ_ENDIO_FREE_SPACE,
+	BTRFS_WQ_ENDIO_RAID56,
+	BTRFS_WQ_ENDIO_DIO_REPAIR,
 };
 
 static inline u64 btrfs_sb_offset(int mirror)
@@ -39,16 +39,16 @@
 struct btrfs_device;
 struct btrfs_fs_devices;
 
+int btrfs_verify_level_key(struct extent_buffer *eb, int level,
+			   struct btrfs_key *first_key, u64 parent_transid);
 struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
 				      u64 parent_transid, int level,
 				      struct btrfs_key *first_key);
 void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr);
-int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
-			 int mirror_num, struct extent_buffer **eb);
 struct extent_buffer *btrfs_find_create_tree_block(
 						struct btrfs_fs_info *fs_info,
 						u64 bytenr);
-void clean_tree_block(struct btrfs_fs_info *fs_info, struct extent_buffer *buf);
+void btrfs_clean_tree_block(struct extent_buffer *buf);
 int open_ctree(struct super_block *sb,
 	       struct btrfs_fs_devices *fs_devices,
 	       char *options);
@@ -113,8 +113,6 @@
 			  int atomic);
 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level,
 		      struct btrfs_key *first_key);
-u32 btrfs_csum_data(const char *data, u32 seed, size_t len);
-void btrfs_csum_final(u32 crc, u8 *result);
 blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
 			enum btrfs_wq_endio_type metadata);
 blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
@@ -123,8 +121,6 @@
 			extent_submit_bio_start_t *submit_bio_start);
 blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
 			  int mirror_num);
-int btrfs_write_tree_block(struct extent_buffer *buf);
-void btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
 int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
 			     struct btrfs_fs_info *fs_info);
 int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
@@ -134,7 +130,6 @@
 void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
 				  struct btrfs_fs_info *fs_info);
 struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
-				     struct btrfs_fs_info *fs_info,
 				     u64 objectid);
 int btree_lock_page_hook(struct page *page, void *data,
 				void (*flush_fn)(void *));