On Fri, Oct 12, 2018 at 11:30:10AM +0900, Damien Le Moal wrote: > Expose through sysfs the nr_zones field of struct request_queue. > Exposing this value helps in debugging disk issues as well as > facilitating scripts based use of the disk (e.g. blktests). > > For zoned block devices, the nr_zones field indicates the total number > of zones of the device calculated using the known disk capacity and > zone size. This number of zones is always 0 for regular block devices. > > Since nr_zones is defined conditionally with CONFIG_BLK_DEV_ZONED, > introduce the blk_queue_nr_zones() function to return the correct value > for any device, regardless if CONFIG_BLK_DEV_ZONED is set. > > Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> Looks good, Reviewed-by: Christoph Hellwig <hch@xxxxxx>
