Hello,

On Tue, Oct 19, 2021 at 10:41:31AM +0800, Yu Kuai wrote:

blkcg_deactivate_policy() can be called from either
blk_cleanup_queue() for all policies or elevator_switch() for bfq
policy. Thus there is no need to freeze queue in
blkcg_deactivate_policy() since the caller freeze the queue aready.

Signed-off-by: Yu Kuai <redacted>

I would just keep the calls. The operation requires the q to be frozen and
there isn't a good way to annotate that the caller must be holding a usage
count, so it's useful even just as documentation.

Thanks.

-- 
tejun