linux-kernel - Re: [PATCH, RFC] sysfs: only allow one scheduled removal callback per kobj

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Date:	Thu, 12 Mar 2009 11:25:36 +0100
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	Alex Chiang <achiang@...com>
Cc:	Greg KH <gregkh@...e.de>, Vegard Nossum <vegard.nossum@...il.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Ingo Molnar <mingo@...e.hu>, jbarnes@...tuousgeek.org,
	tj@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH, RFC] sysfs: only allow one scheduled removal callback
 per kobj

On Wed, 11 Mar 2009 12:42:25 -0600,
Alex Chiang <achiang@...com> wrote:

> * Greg KH <gregkh@...e.de>:
> > On Wed, Mar 11, 2009 at 06:47:29PM +0100, Cornelia Huck wrote:
> > > (For the original oops, I'd rather solve the problem by making sure the
> > > caller doesn't trigger removal several times - should probably be less
> > > code than the proposed patch?)
> > 
> > Any ideas on how to do this?
> 
> I still think the original patch I proposed is the right answer.

How about just putting a marker on your device that is going to be
unregistered and refusing to schedule it again? (This marker could also
be used to block other undesired actions; that's what ccwgroup does.)
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