linux-kernel - Re: [PATCH AUTOSEL 5.10 22/34] net/sched: taprio: taprio_dump and taprio_change are protected by rtnl

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Date:   Mon, 10 Oct 2022 13:33:38 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Sasha Levin <sashal@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        "vinicius.gomes@...el.com" <vinicius.gomes@...el.com>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH AUTOSEL 5.10 22/34] net/sched: taprio: taprio_dump and
 taprio_change are protected by rtnl_mutex

On Sun, Oct 09, 2022 at 06:21:16PM -0400, Sasha Levin wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
> 
> [ Upstream commit 18cdd2f0998a4967b1fff4c43ed9aef049e42c39 ]
> 
> Since the writer-side lock is taken here, we do not need to open an RCU
> read-side critical section, instead we can use rtnl_dereference() to
> tell lockdep we are serialized with concurrent writes.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
> Signed-off-by: Jakub Kicinski <kuba@...nel.org>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---

Not needed for stable kernels, please drop, thanks.