On Wed, Jun 05, 2024 at 04:51:43PM +0900, Damien Le Moal wrote: > +static int dm_device_count_zones(struct dm_dev *dev, > + struct dm_device_zone_count *zc) > +{ > + int ret; > + > + ret = blkdev_report_zones(dev->bdev, 0, UINT_MAX, > + dm_device_count_zones_cb, zc); Other than the nitpick that BLK_ALL_ZONES looks better than UINT_MAX here, looks good. -Ben