Commits
Merge tag 'for-linus-2019-09-27' of git://git.kernel.dk/linux-block Pull block fixes from Jens Axboe: "A few fixes/changes to round off this merge window. This contains: - Small series making some functional tweaks to blk-iocost (Tejun) - Elevator switch locking fix (Ming) - Kill redundant call in blk-wbt (Yufen) - Fix flush timeout handling (Yufen)" * tag 'for-linus-2019-09-27' of git://git.kernel.dk/linux-block: block: fix null pointer dereference in blk_mq_rq_timed_out() rq-qos: get rid of redundant wbt_update_limits() iocost: bump up default latency targets for hard disks iocost: improve nr_lagging handling iocost: better trace vrate changes block: don't release queue's sysfs lock during switching elevator blk-mq: move lockdep_assert_held() into elevator_exit
