linux-kernel - Re: Re: Re: [PATCH] fix race condition between device_del and device

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Message-ID: <20150330142414.GB10446@kroah.com>
Date:	Mon, 30 Mar 2015 16:24:14 +0200
From:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:	EunTaik Lee <eun.taik.lee@...sung.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Re: Re: [PATCH] fix race condition between device_del and
 device_add

On Mon, Mar 30, 2015 at 02:02:27PM +0000, EunTaik Lee wrote:
> 
> The problem was on 3.10.49.
> 
> I carefully looked up the patches again and found out that there was
> a patch on 3.18 that will solve the problem
> 
> commit	e4a60d139060975eb956717e4f63ae348d4d8cc5
> sysfs: driver core: Fix glue dir race condition by gdp_mutex

Yes, you need a "real" lock to fix this type of race condition, I
thought we had fixed this a while ago, thanks for verifying it.

greg k-h
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