faffaab28959 ("blkcg: Restructure blkg_conf_prep() and friends")
83462a6c971c ("blkcg: Drop unnecessary RCU read [un]locks from blkg_conf_prep/finish()")
235a5a83f637 ("blk-iocost: don't allow to configure bio based device")
37754595e947 ("blk-cgroup: Fix typo in comment")
2b2da2f6dc80 ("blk-iocost: prevent configuration update concurrent with io throttling")
2c0647988433 ("blk-iocost: don't release 'ioc->lock' while updating params")