linux-kernel - Re: [PATCH 3/6] autofs/autofs4: move compat

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Date:	Fri, 16 Jul 2010 12:40:30 +0800
From:	Ian Kent <raven@...maw.net>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Arnd Bergmann <arnd@...db.de>, "H. Peter Anvin" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	John Kacur <jkacur@...hat.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	"autofs@...ux.kernel.org" <autofs@...ux.kernel.org>
Subject: Re: [PATCH 3/6] autofs/autofs4: move compat_ioctl handling into fs

On Fri, 2010-07-16 at 02:14 +0200, Frederic Weisbecker wrote:
> 2010/7/6 Ian Kent <raven@...maw.net>:
> >
> >
> > On 06/07/2010, at 7:35 PM, Arnd Bergmann <arnd@...db.de> wrote:
> >
> >>
> >> Well, the only use of the BKL in autofs4 is in the ioctl function. You
> >> can probably replace that trivially with a global mutex, but from a quick
> >> inspection, even that should not be needed: The only ioctl command in
> >> autofs4 that does not already seem to have adequate locking is
> >> autofs4_get_set_timeout, which is even easier to change and still harmless
> >> if you don't do it at all.
> >
> > That's right of course.
> >
> > Even this shouldn't be a problem as it is called by a single instance, per autofs mount, of the daemon only. A fair amount of effort has gone into trying to make the autofs4 module independent of the BKL over time. However I would still rather not do the change concurrently with the ioctl changes.
> >
> > Ian
> 
> 
> In any case, can we let you handle this patch for 2.6.36 inclusion?

I think it makes more sense to keep these common patches together so
Arnd probably should keep it with his series.

Ian

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