648 	if (tp->t_firstblock == NULLFSBLOCK) {  in xfs_bmap_extents_to_btree()
653 		args.fsbno = tp->t_firstblock;  in xfs_bmap_extents_to_btree()
656 		args.fsbno = tp->t_firstblock;  in xfs_bmap_extents_to_btree()
673 	ASSERT(tp->t_firstblock == NULLFSBLOCK ||  in xfs_bmap_extents_to_btree()
674 	       args.agno >= XFS_FSB_TO_AGNO(mp, tp->t_firstblock));  in xfs_bmap_extents_to_btree()
675 	tp->t_firstblock = args.fsbno;  in xfs_bmap_extents_to_btree()
807 	if (tp->t_firstblock == NULLFSBLOCK) {  in xfs_bmap_local_to_extents()
811 		args.fsbno = tp->t_firstblock;  in xfs_bmap_local_to_extents()
823 	tp->t_firstblock = args.fsbno;  in xfs_bmap_local_to_extents()
3041 	nullfb = ap->tp->t_firstblock == NULLFSBLOCK;  in xfs_bmap_adjacent()
3045 							ap->tp->t_firstblock);  in xfs_bmap_adjacent()
3418 	nullfb = ap->tp->t_firstblock == NULLFSBLOCK;  in xfs_bmap_process_allocated_extent()
3425 		XFS_FSB_TO_AGNO(args->mp, ap->tp->t_firstblock) <=  in xfs_bmap_process_allocated_extent()
3430 		ap->tp->t_firstblock = args->fsbno;  in xfs_bmap_process_allocated_extent()
3477 	if (ap->tp->t_firstblock == NULLFSBLOCK) {  in xfs_bmap_exact_minlen_extent_alloc()
3488 		ap->blkno = ap->tp->t_firstblock;  in xfs_bmap_exact_minlen_extent_alloc()
3550 	nullfb = ap->tp->t_firstblock == NULLFSBLOCK;  in xfs_bmap_btalloc()
3552 							ap->tp->t_firstblock);  in xfs_bmap_btalloc()
3563 		ap->blkno = ap->tp->t_firstblock;  in xfs_bmap_btalloc()
3574 		ap->blkno = ap->tp->t_firstblock;  in xfs_bmap_btalloc()
4267 	if (tp && tp->t_firstblock != NULLFSBLOCK)  in xfs_bmapi_minleft()
6157 	ASSERT(tp->t_firstblock == NULLFSBLOCK);  in xfs_bmap_finish_one()