linux-kernel - Re: Subject: [PATCH] kobject: fix the race between kobject_del and get_device

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Date:	Tue, 4 Nov 2014 22:13:45 -0500
From:	Tejun Heo <tj@...nel.org>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	Weng Meiling <wengmeiling.weng@...wei.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Frans Klaver <fransklaver@...il.com>,
	Jens Axboe <axboe@...nel.dk>, akpm@...ux-foundation.org,
	adilger.kernel@...ger.ca, Jan Kara <jack@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Xiang Rui <rui.xiang@...wei.com>,
	Li Zefan <lizefan@...wei.com>,
	Huang Qiang <h.huangqiang@...wei.com>,
	Zhao Hongjiang <zhaohongjiang@...wei.com>
Subject: Re: Subject: [PATCH] kobject: fix the race between kobject_del and
 get_device_parent

Hello,

On Wed, Nov 05, 2014 at 10:01:39AM +0800, Yijing Wang wrote:
> > So, yeah, this looks like a correct approach; however, do we even need
> > to clear the glue directories? 
> 
> Yes. In our platform, the glue directories
> /sys/devices/virtual/block will be removed once the last child
> device call device_del().

What I mean is why are we even trying to remove the parent directory?
Can't we just keep them around once created?

Thanks.

-- 
tejun
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