tree f0fc3b848bf3d3df26fb1ac238d084bb73e08c9b
parent bcf876870b95592b52519ed4aafcf9d95999bc9c
author Amol Grover <frextrite@gmail.com> 1586170790 +0530
committer James Morris <jmorris@namei.org> 1597947903 -0700

device_cgroup: Fix RCU list debugging warning

exceptions may be traversed using list_for_each_entry_rcu()
outside of an RCU read side critical section BUT under the
protection of decgroup_mutex. Hence add the corresponding
lockdep expression to fix the following false-positive
warning:

[    2.304417] =============================
[    2.304418] WARNING: suspicious RCU usage
[    2.304420] 5.5.4-stable #17 Tainted: G            E
[    2.304422] -----------------------------
[    2.304424] security/device_cgroup.c:355 RCU-list traversed in non-reader section!!

Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: James Morris <jmorris@namei.org>