• Tejun Heo's avatar
    blkcg: make CONFIG_BLK_CGROUP bool · 32e380ae
    Tejun Heo authored
    Block cgroup core can be built as module; however, it isn't too useful
    as blk-throttle can only be built-in and cfq-iosched is usually the
    default built-in scheduler.  Scheduled blkcg cleanup requires calling
    into blkcg from block core.  To simplify that, disallow building blkcg
    as module by making CONFIG_BLK_CGROUP bool.
    If building blkcg core as module really matters, which I doubt, we can
    revisit it after blkcg API cleanup.
    -v2: Vivek pointed out that IOSCHED_CFQ was incorrectly updated to
         depend on BLK_CGROUP.  Fixed.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Cc: Vivek Goyal <vgoyal@redhat.com>
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>