Commits
Shaohua Li committed 3684aa7099e
block-dev: enable writeback cgroup support block_dev's .writepages/.writepage already handles wbc_init_bio/wbc_account_io. We only set the SB_I_CGROUPWB bit to suppport writeback cgroup support. Signed-off-by: Shaohua Li <shli@fb.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@fb.com>