-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
-void btrfs_transaction_cleaner(void *p);
-#else
-void btrfs_transaction_cleaner(struct work_struct *work);
-#endif
-
-void btrfs_transaction_flush_work(struct btrfs_root *root);
-void btrfs_transaction_queue_work(struct btrfs_root *root, int delay);
-void btrfs_init_transaction_sys(void);
-void btrfs_exit_transaction_sys(void);
-int btrfs_add_dead_root(struct btrfs_root *root, struct btrfs_root *latest,
- struct list_head *dead_list);
-int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info);