linux-kernel - Re: BUG: circular locking dependency detected

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Message-ID: <CAKMK7uGF8jfOX8gbLO1=419eKUAbMtRjAnoDKSTR567D3HKwTg@mail.gmail.com>
Date:	Thu, 31 Jan 2013 10:38:23 +0100
From:	Daniel Vetter <daniel.vetter@...ll.ch>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Russell King <rmk@....linux.org.uk>,
	Dave Airlie <airlied@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Florian Tobias Schandinat <FlorianSchandinat@....de>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	dri-devel <dri-devel@...ts.freedesktop.org>
Subject: Re: BUG: circular locking dependency detected

On Thu, Jan 31, 2013 at 10:21 AM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>> Can you please also pick up the (currently) three locking fixups
>> around fbcon? Just so that we don't repeat the same fun where people
>> complain about lockdep splats, but the fixes are stuck somewhere. And
>> I guess Dave would be happy to not end up as fbcon maintainer ;-) He
>> has a git branch with them at
>> http://cgit.freedesktop.org/~airlied/linux/log/?h=fbcon-locking-fixes
>> though I have a small bikeshed on his last patch pending.
>
> Care to just send me the patches through email when you all get done
> bikesheding?  And for some reason I thought Andrew was going to handle
> these fbcon patches, but if not, I'll be glad to take them.

Yeah, I'll annoy people again with patches until they're merged ;-)
Iirc Andrew picked them due to lack of an fbcon maintainer, and
everyone else likes to pass the bucket. Having looked through the code
a bit, imo understandable ...

btw, I've started to look into how we could fix the locking madness
around fbcon for good instead of with duct-tape [1]. I'll try to
discuss this with a few fbdev guys at fosdem (some at least should be
there). Certainly a long-term thing, but comments from whomever gets
volunteered to shepherd fbcon would be great.

Cheers, Daniel

1: http://www.mail-archive.com/dri-devel@lists.freedesktop.org/msg33535.html
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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