linux-kernel - Re: [Bug 8473] New: Oops: 0010 [1] SMP

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Message-Id: <20070608123350.5cc53c10.akpm@linux-foundation.org>
Date:	Fri, 8 Jun 2007 12:33:50 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Paul Fulghum <paulkf@...rogate.com>
Cc:	Björn Steinbrink <B.Steinbrink@....de>,
	Arnd Bergmann <arnd@...db.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Nicolas Mailhot <nicolas.mailhot@...oste.net>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, linux-kernel@...r.kernel.org,
	Mel Gorman <mel@....ul.ie>,
	Christoph Lameter <clameter@....com>
Subject: Re: [Bug 8473] New: Oops: 0010 [1] SMP

On Fri, 08 Jun 2007 14:20:48 -0500
Paul Fulghum <paulkf@...rogate.com> wrote:

> On Fri, 2007-06-08 at 10:16 -0500, Paul Fulghum wrote:
> > On Fri, 2007-06-08 at 05:06 +0200, Bj__rn Steinbrink wrote:
> > > This is do_tty_hangup() exchanging the fops while we're waiting for the
> > > lock. The new fops (hung_up_tty_fops) only have the unlocked variant and
> > > thus we Oops our way.
> ...
> > Here is a patch that restores the locked ioctl for hung_up_tty_ioctl.
> > Can you try it and see if it removes your oops?
> 
> Unfortunately I can't get the timing right to trigger this,
> but it is very clear the locked ioctl fop must not be
> allowed to disappear like my original patch allows.
> 
> Andrew:
> 
> Would you prefer I resend the entire compat ioctl patch or
> submit an incremental patch like in my message I'm quoting above?
> 

The compat_ioctl patch is in mainline, and has been for some time.

Hence a patch against mainline would be appropriate, thanks.
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