From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757605Ab0FBJNN (ORCPT ); Wed, 2 Jun 2010 05:13:13 -0400 Received: from mo-p00-ob.rzone.de ([81.169.146.160]:55415 "EHLO mo-p00-ob.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754294Ab0FBJNL (ORCPT ); Wed, 2 Jun 2010 05:13:11 -0400 X-RZG-AUTH: :P2EQZWCpfu+qG7CngxMFH1J+3aIibppu0283ogF9SEP/jQF66A== X-RZG-CLASS-ID: mo00 Date: Wed, 2 Jun 2010 11:13:01 +0200 From: Olaf Hering To: Arnd Bergmann Cc: linux-kernel@vger.kernel.org Subject: Re: acquire_console_mutex: WARNING: at 2.6.33.4-rt20/kernel/mutex-debug.c:65 mutex_remove_waiter+0xe8/0x11c() Message-ID: <20100602091301.GA9242@aepfle.de> References: <20100524225357.GA19513@aepfle.de> <201005251318.37242.arnd@arndb.de> <20100530213902.GA3619@aepfle.de> <201005311329.07182.arnd@arndb.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <201005311329.07182.arnd@arndb.de> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 31, Arnd Bergmann wrote: > On Sunday 30 May 2010, Olaf Hering wrote: > > > You could try to pull in the blk/tty branch from > > > http://git.kernel.org/?p=linux/kernel/git/arnd/playground.git and enable > > > CONFIG_TTY_MUTEX to see if that gives you better lockdep output, > > > because that replaces the implicit dropping of the BKL with mutex operations > > > that lockdep is aware of. > > > > CONFIG_TTY_MUTEX depends on SMP and this ARM system does not support > > CONFIG_SMP, its hidden by Kconfig dependencies. Arnd, I do not have access to this ARM board anymore, and other systems I own do not have hardware for serial console. So I can not test or debug this further. Olaf