common/zoned: add _require_zloop

Add _require_zloop() function used by tests that require support for the
zoned loopback block device.

Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Anand Jain <asj@kernel.org>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Zorro Lang <zlang@kernel.org>
1 file changed