linux-kernel - Re: [PATCH 0/2] Fix boot regression for s390 and remove break

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Message-Id: <20171202090207.GA5046@osiris>
Date:   Sat, 2 Dec 2017 10:02:08 +0100
From:   Heiko Carstens <heiko.carstens@...ibm.com>
To:     Will Deacon <will.deacon@....com>
Cc:     linux-kernel@...r.kernel.org, sebott@...ux.vnet.ibm.com,
        schwidefsky@...ibm.com, peterz@...radead.org, mingo@...nel.org
Subject: Re: [PATCH 0/2] Fix boot regression for s390 and remove break_lock

On Tue, Nov 28, 2017 at 06:42:17PM +0000, Will Deacon wrote:
> Hi all,
> 
> 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?