linux-kernel - Re: kernfs/rtc: circular dependency between kernfs and ops

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Message-ID: <20140331140344.6030c7da@linux.lan.towertech.it>
Date:	Mon, 31 Mar 2014 14:03:44 +0200
From:	Alessandro Zummo <a.zummo@...ertech.it>
To:	Lars-Peter Clausen <lars@...afoo.de>
Cc:	Sasha Levin <sasha.levin@...cle.com>, Tejun Heo <tj@...nel.org>,
	Greg KH <greg@...ah.com>, rtc-linux@...glegroups.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kernfs/rtc: circular dependency between kernfs and ops_lock

On Mon, 31 Mar 2014 13:07:10 +0200
Lars-Peter Clausen <lars@...afoo.de> wrote:

> It doesn't really matter where it is unregistered. device_unregister() will 
> (somewhere down it's callchain) take the kernfs lock, hence it must be 
> callled with the rtc mutex being held.

 Maybe device_remove_attrs could be called in the rtc base class,
 before the device removal?

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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