Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <a3fe40b5-b88e-4d01-0209-6d26b2d384bd@bell.net>
Date:   Sat, 14 May 2022 12:47:00 -0400
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
 Thunderbird/91.9.0
Subject: Re: [PATCH AUTOSEL 5.17 21/21] Revert "parisc: Fix patch code locking
 and flushing"
Content-Language: en-US
To:     Sasha Levin <sashal@kernel.org>, Helge Deller <deller@gmx.de>
Cc:     linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        James.Bottomley@hansenpartnership.com, linux-parisc@vger.kernel.org
References: <20220510154340.153400-1-sashal@kernel.org>
 <20220510154340.153400-21-sashal@kernel.org>
 <37d6bcac-bca4-06a6-ecab-bf83bd3468cd@gmx.de> <Yn/X0quyI58WVTfJ@sashalap>
From:   John David Anglin <dave.anglin@bell.net>
In-Reply-To: <Yn/X0quyI58WVTfJ@sashalap>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Precedence: bulk

On 2022-05-14 12:24 p.m., Sasha Levin wrote:
> On Tue, May 10, 2022 at 05:49:31PM +0200, Helge Deller wrote:
>> Hello Sascha,
>>
>> please drop this patch from all your stable-series queues....
>> It shouldn't be backported.
>
> I've dropped it, but... why?
It exposed a problem in the kernel flush code for PA 1.x machines. The patch works okay on
all PA 2.0 machines.  It also works on PA 1.x machines when flush_cache_all is used to flush
changes to memory.

Helge is investigating PA 1.x problem.

-- 
John David Anglin  dave.anglin@bell.net