hpfs_remove_btree
hpfs_remove_btree(s, GET_BTREE_PTR(&anode->btree));
hpfs_remove_btree(s, btree);
if (!fnode_is_dir(fnode)) hpfs_remove_btree(s, GET_BTREE_PTR(&fnode->btree));
hpfs_remove_btree(s, GET_BTREE_PTR(&anode->btree));
void hpfs_remove_btree(struct super_block *, struct bplus_header *);