linux-kernel - Re: [BUG] rtc uie emulation deadlocks

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Message-Id: <20080819131546.51dea318.akpm@linux-foundation.org>
Date:	Tue, 19 Aug 2008 13:15:46 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	David Brownell <david-b@...bell.net>
Cc:	rmk+lkml@....linux.org.uk, a.zummo@...ertech.it,
	linux-kernel@...r.kernel.org, david-b@...bell.net,
	Atsushi Nemoto <anemo@....ocn.ne.jp>
Subject: Re: [BUG] rtc uie emulation deadlocks

On Tue, 19 Aug 2008 10:12:04 -0700 (PDT)
David Brownell <david-b@...bell.net> wrote:

> 
> --- Andrew Morton <akpm@...ux-foundation.org> wrote:
> 
> > On Mon, 11 Aug 2008 14:43:39 +0100 Russell King
> > <rmk+lkml@....linux.org.uk> wrote:
> > 
> > > The locking looks a rather random in there, so I'm not going to try to
> > > create a patch.
> > > 
> > 
> > Looks like this was caused by
> > 
> > commit 5ad31a575157147b43fa84ef1e21471661653878
> > Author: David Brownell <david-b@...bell.net>
> > Date:   Wed Jul 23 21:30:33 2008 -0700
> > 
> >     rtc: remove BKL for ioctl()
> 
> I'm sure I saw someone else's fixup patch for that a couple weeks ago.
> (Looks).  Yes:
> 
> http://groups.google.com/group/rtc-linux/browse_thread/thread/ad65b883739f8c92#

argh, so a fix for a serious regression has been languishing in the
backwaters of the rtc list for two weeks.

Guys, please: regressions are serious, top-priority emergencies.  We
drop everything and run around with our hair on fire when we hear about
one (don't we?).  Please, if you have a report of a regression or a fix
for one, Cc: everyone in the world on it.

I'd prefer not to go fishing through HTML to piece that patch together,
but as my hair is on fire I guess I'd better do so.

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