On Sun, Aug 28, 2022 at 08:22:02AM -1000, Tejun Heo wrote:

On Mon, Aug 22, 2022 at 01:04:58PM -0400, Gabriel Ryan wrote:

quoted

Hi Christian,

We ran a quick test and confirm your suggestion would eliminate the
data race alert we observed. If the data race is benign (and it
appears to be), using WRITE_ONCE(cgrp_dfl_visible, true) instead of
cmpxchg in cgroup_get_tree() would probably also be ok.

I don't see how the data race can lead to anything but would the following
work?

Yep. You can take my,
Reviewed-by: Christian Brauner (Microsoft) <brauner@kernel.org>
when you turn it into a patch.