[PATCH v5 6/7] null_blk: use zone_size_sects_shift for power of 2 zoned devices

[Luis Chamberlain]

On Mon, May 23, 2022 at 06:16:00PM +0200, Pankaj Raghav wrote:
> Instead of doing is_power_of_2 and ilog2 operation for every IO, cache
> the zone_size_sects_shift variable and use it for power of 2 zoned
> devices.
> 
> This variable will be set to zero for non power of 2 zoned devices.
> 
> Suggested-by: Damien Le Moal <damien.lemoal at wdc.com>
> Signed-off-by: Pankaj Raghav <p.raghav at samsung.com>

Reviewed-by: Luis Chamberlain <mcgrof at kernel.org>

  Luis