extern struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag,
		struct xfs_trans *tp, struct xfs_buf *agbp, xfs_btnum_t btnum)
struct xfs_btree_cur *xfs_inobt_init_cursor(struct xfs_perag *pag,
		struct xfs_trans *tp, struct xfs_buf *agbp)