extern struct kmem_cache *btrfs_delayed_data_ref_cachep;
extern struct kmem_cache *btrfs_delayed_extent_op_cachep;
-int btrfs_delayed_ref_init(void);
+int __init btrfs_delayed_ref_init(void);
void btrfs_delayed_ref_exit(void);
static inline struct btrfs_delayed_extent_op *