linux-kernel - Re: [PATCH -next] cgroup: Remove out-of-date comment in cgroup

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Message-ID: <c56473be-facb-e0ea-246c-bdd5bf74c7cd@huaweicloud.com>
Date:   Wed, 24 May 2023 14:57:05 +0800
From:   Xiu Jianfeng <xiujianfeng@...weicloud.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     lizefan.x@...edance.com, hannes@...xchg.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] cgroup: Remove out-of-date comment in
 cgroup_migrate()



On 2023/5/24 3:09, Tejun Heo wrote:
> On Tue, May 23, 2023 at 07:14:56PM +0800, Xiu Jianfeng wrote:
>> From: Xiu Jianfeng <xiujianfeng@...wei.com>
>>
>> Commit 674b745e22b3 ("cgroup: remove rcu_read_lock()/rcu_read_unlock()
>> in critical section of spin_lock_irq()") has removed the rcu_read_lock,
>> which makes the comment out-of-date, so remove it.
>>
>> Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>
> 
> So, that removed rcu_read_lock() because it's implied by the irq disable but
> the comment content is still useful in describing what's preventing
> use-after-free. Can you please update the comment accordingly instead?

sure, I would send a v2.

> 
> Thanks.
>