Non-partitionable devices, like zoned block devices, aren't showing
up in in /proc/partitions and therefore we cannot rely on it to get
a device's size.
Use blockdev --getsz to get the block device size.
Cc: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
Johannes Thumshirn
939acb6507