From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1752861AbdLKMrc (ORCPT <rfc822;w@1wt.eu>);
        Mon, 11 Dec 2017 07:47:32 -0500
Received: from foss.arm.com ([217.140.101.70]:57002 "EHLO foss.arm.com"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1752470AbdLKMrb (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 11 Dec 2017 07:47:31 -0500
Date: Mon, 11 Dec 2017 12:47:38 +0000
From: Will Deacon <will.deacon@arm.com>
To: Heiko Carstens <heiko.carstens@de.ibm.com>, mingo@kernel.org
Cc: linux-kernel@vger.kernel.org, sebott@linux.vnet.ibm.com,
        schwidefsky@de.ibm.com, peterz@infradead.org
Subject: Re: [PATCH 0/2] Fix boot regression for s390 and remove break_lock
Message-ID: <20171211124738.GF26810@arm.com>
References: <1511894539-7988-1-git-send-email-will.deacon@arm.com>
 <20171202090207.GA5046@osiris>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20171202090207.GA5046@osiris>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Sat, Dec 02, 2017 at 10:02:08AM +0100, Heiko Carstens wrote:
> On Tue, Nov 28, 2017 at 06:42:17PM +0000, Will Deacon wrote:
> > The following two patches do the following:
> > 
> >   1. Fix boot breakage reported on s390 caused by a8a217c22116
> >   2. Kill off the break_lock field entirely, since it's not actually
> >      that useful
> > 
> > I didn't go the whole hog and remove CONFIG_GENERIC_LOCKBREAK, since the
> > "do something different with locks in preemptible kernels" isn't necessarily
> > a bad idea, and PowerPC actually implements things like arch_spin_relax
> > for that.
> > 
> > The first patch should go in to 4.15.
> > 
> > Thanks,
> > 
> > Will
> > 
> > --->8
> > 
> > Will Deacon (2):
> >   locking/core: Fix deadlock during boot on systems with
> >     GENERIC_LOCKBREAK
> >   locking/core: Remove break_lock field when CONFIG_GENERIC_LOCKBREAK=y
> > 
> >  include/linux/rwlock_types.h   |  3 ---
> >  include/linux/spinlock.h       |  5 -----
> >  include/linux/spinlock_types.h |  3 ---
> >  kernel/locking/spinlock.c      | 13 +++----------
> >  4 files changed, 3 insertions(+), 21 deletions(-)
> 
> *ping* ... these patches haven't been picked up yet as far as I can tell.
> Peter, Ingo?

Damn, this first patch didn't appear in -rc3.

Ingo -- please can you pick this up? Without it, s390 doesn't boot with
mainline.

Thanks,

Will