drivers/md/dm-thin.c

1674 	struct dm_bio_prison_cell *data_cell;
1706 			if (bio_detain(tc->pool, &data_key, NULL, &data_cell)) {
1722 			m->cell = data_cell;
1875 	struct dm_bio_prison_cell *data_cell;
1884 	if (bio_detain(pool, &key, bio, &data_cell)) {
1890 		break_sharing(tc, bio, block, &key, lookup_result, data_cell);
1899 		remap_and_issue_shared_cell(tc, data_cell, lookup_result->block);
2728 	struct dm_bio_prison_cell *virt_cell, *data_cell;
2784 		if (bio_detain(tc->pool, &key, bio, &data_cell)) {
2790 		cell_defer_no_holder(tc, data_cell);