nilfs_bmap_prepare_alloc_ptr
ret = nilfs_bmap_prepare_alloc_ptr(btree, &path[level].bp_newreq, dat);
ret = nilfs_bmap_prepare_alloc_ptr(btree,
ret = nilfs_bmap_prepare_alloc_ptr(btree, &path[level].bp_newreq, dat);
ret = nilfs_bmap_prepare_alloc_ptr(btree, dreq, dat);
ret = nilfs_bmap_prepare_alloc_ptr(btree, nreq, dat);
ret = nilfs_bmap_prepare_alloc_ptr(bmap, &req, dat);