| Message ID | 20190613223041.606735-5-tj@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/5] blk-iolatency: clear use_delay when io.latency is set to zero | expand |
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 04d286934c5e..440797293235 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -1390,7 +1390,8 @@ int blkcg_activate_policy(struct request_queue *q, spin_lock_irq(&q->queue_lock); - list_for_each_entry(blkg, &q->blkg_list, q_node) { + /* blkg_list is pushed at the head, reverse walk to init parents first */ + list_for_each_entry_reverse(blkg, &q->blkg_list, q_node) { struct blkg_policy_data *pd; if (blkg->pd[pol->plid])
When blkcg_activate_policy() is creating blkg_policy_data for existing blkgs, it did in the wrong order - descendants first. Fix it. None of the existing controllers seem affected by this. Signed-off-by: Tejun Heo <tj@kernel.org> --- block/blk-cgroup.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)