[Devel] [PATCH hci-8.1 2/6] ms/cgroup/dmem: avoid rcu warning when unregister region

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> From: Chen Ridong <chenridong at huawei.com>
> 
> A warnning was detected:
> 
>  WARNING: suspicious RCU usage
>  6.19.0-rc7-next-20260129+ #1101 Tainted: G           O
>  kernel/cgroup/dmem.c:456 suspicious rcu_dereference_check() usage!
> 
>  other info that might help us debug this:
> 
>  rcu_scheduler_active = 2, debug_locks = 1
>  1 lock held by insmod/532:
>   #0: ffffffff85e78b38 (dmemcg_lock){+.+.}-dmem_cgroup_unregister_region+
> 
>  stack backtrace:
> [ ... ]
> Signed-off-by: Tejun Heo <tj at kernel.org>
> (cherry picked from commit 592a68212c5664bcaa88f24ed80bf791282790fe)
> 
> https://virtuozzo.atlassian.net/browse/VSTOR-152813
> Signed-off-by: Mirian Shilakadze <mirian.shilakadze at virtuozzo.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261101235155.124059-1-mirian.shilakadze@virtuozzo.com?part=2