> + bdev = bt->bt_bdev;> + if (!blk_queue_dax(bdev->bd_queue))> + return NULL;> +> + if (!bt->bt_daxdev)> + bt->bt_daxdev = fs_dax_get_by_host(bdev->bd_disk->disk_name);> +> + return bt->bt_daxdev;Please do this at mount time.