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References: <20230803071711.2546560-1-lilingfeng@huaweicloud.com>
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From:   Song Liu <song@kernel.org>
Date:   Sun, 13 Aug 2023 21:04:54 +0400
Message-ID: <CAPhsuW6W3ia3zYVZjVKLND7oGpVQt0qgO3=7nCXTuDmoT3Mzxg@mail.gmail.com>
Subject: Re: [PATCH -next v3] md: Hold mddev->reconfig_mutex when trying to
 get mddev->sync_thread
To:     Li Lingfeng <lilingfeng@huaweicloud.com>
Cc:     linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
        yukuai3@huawei.com, linan122@huawei.com, yi.zhang@huawei.com,
        yangerkun@huawei.com, lilingfeng3@huawei.com, pmenzel@molgen.mpg.de
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On Thu, Aug 3, 2023 at 11:20=E2=80=AFAM Li Lingfeng <lilingfeng@huaweicloud=
.com> wrote:
>
> From: Li Lingfeng <lilingfeng3@huawei.com>
>
> Commit ba9d9f1a707f ("Revert "md: unlock mddev before reap sync_thread in
> action_store"") removed the scenario of calling md_unregister_thread()
> without holding mddev->reconfig_mutex, so add a lock holding check before
> acquiring mddev->sync_thread by passing mdev to md_unregister_thread().
>
> Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
> Reviewed-by: Yu Kuai <yukuai3@huawei.com>

Applied to md-next.

Thanks,
Song