On Thu, Sep 04, 2025 at 10:44:32AM +0800, Yu Kuai wrote: > - it's only used by iolatency, which can only be enabled for rq-based > disks; > - For bio that is submitted the first time, blk_cgroup_bio_start() is > called from submit_bio_no_acct_nocheck(), where q_usage_counter is not > grabbed yet, hence it's not safe to enable that flag while enabling > iolatency. Yes, keeping more things in blk-mq is always good. > -void blk_mq_submit_bio(struct bio *bio) > +void b k_mq_submit_bio(struct bio *bio) This got mangled somehow.