linux-kernel - Re: [PATCH] md: get rdev->mddev with READ

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Date: Mon, 29 Jan 2024 22:48:46 -0800
From: Song Liu <song@...nel.org>
To: Li Lingfeng <lilingfeng@...weicloud.com>
Cc: linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org, 
	yukuai3@...wei.com, linan122@...wei.com, yi.zhang@...wei.com, 
	yangerkun@...wei.com, lilingfeng3@...wei.com
Subject: Re: [PATCH] md: get rdev->mddev with READ_ONCE()

On Mon, Jan 29, 2024 at 5:55 AM Li Lingfeng <lilingfeng@...weicloudcom> wrote:
>
> Friendly ping ...
>
> Thanks
>
> 在 2023/12/29 15:05, Li Lingfeng 写道:
> > From: Li Lingfeng <lilingfeng3@...wei.com>
> >
> > Users may get rdev->mddev by sysfs while rdev is releasing.
> > So use both READ_ONCE() and WRITE_ONCE() to prevent load/store tearing
> > and to read/write mddev atomically.
> >
> > Signed-off-by: Li Lingfeng <lilingfeng3@...wei.com>

Sorry for the delay. Applied to md-tmp-6.9 branch.

Thanks,
Song