linux-kernel - Re: [PATCH] blk-cgroup: Remove unnecessary rcu_read

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Message-ID: <CAMZfGtU8GYN6aLepHr3z=AvJ4XivmWpPdnvUBgaJUnmf37-28Q@mail.gmail.com>
Date:   Tue, 17 May 2022 12:11:08 +0800
From:   Muchun Song <songmuchun@...edance.com>
To:     bh1scw@...il.com
Cc:     Tejun Heo <tj@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Cgroups <cgroups@...r.kernel.org>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] blk-cgroup: Remove unnecessary rcu_read_lock/unlock()

On Tue, May 17, 2022 at 1:39 AM <bh1scw@...il.com> wrote:
>
> From: Fanjun Kong <bh1scw@...il.com>
>
> spin_lock_irq/spin_unlock_irq contains preempt_disable/enable().
> Which can serve as RCU read-side critical region, so remove
> rcu_read_lock/unlock().
>
> Signed-off-by: Fanjun Kong <bh1scw@...il.com>

Reviewed-by: Muchun Song <songmuchun@...edance.com>

Thanks.