linux-kernel - Re: [PATCH] cgroup.c: Use built-in RCU list checking

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Message-ID: <20200129142255.GE11384@blackbody.suse.cz>
Date:   Wed, 29 Jan 2020 15:22:55 +0100
From:   Michal Koutný <mkoutny@...e.com>
To:     madhuparnabhowmik10@...il.com
Cc:     tj@...nel.org, lizefan@...wei.com, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, joel@...lfernandes.org,
        rcu@...r.kernel.org, frextrite@...il.com
Subject: Re: [PATCH] cgroup.c: Use built-in RCU list checking

Hello.

On Sat, Jan 18, 2020 at 08:40:51AM +0530, madhuparnabhowmik10@...il.com wrote:
> From: Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
> 
> list_for_each_entry_rcu has built-in RCU and lock checking.
> Pass cond argument to list_for_each_entry_rcu() to silence
> false lockdep warning when  CONFIG_PROVE_RCU_LIST is enabled
> by default.
I assume if you've seen the RCU warning, you haven't seen the warning
from cgroup_assert_mutex_or_rcu_locked() above. 

The patch makes sense to me from the consistency POV.

Acked-by: Michal Koutný <mkoutny@...e.com>

Michal