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;
From:   Michael Ellerman <patch-notifications@ellerman.id.au>
To:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Paul Mackerras <paulus@samba.org>
Cc:     linuxppc-dev@lists.ozlabs.org, Russell Currey <ruscur@russell.cc>,
        Maxime Bizon <mbizon@freebox.fr>, linux-kernel@vger.kernel.org
In-Reply-To: <43c3c76a1175ae6dc1a3d3b5c3f7ecb48f683eea.1640344012.git.christophe.leroy@csgroup.eu>
References: <43c3c76a1175ae6dc1a3d3b5c3f7ecb48f683eea.1640344012.git.christophe.leroy@csgroup.eu>
Subject: Re: [PATCH v3 1/2] powerpc/set_memory: Avoid spinlock recursion in change_page_attr()
Message-Id: <164501434734.521186.493750224564400396.b4-ty@ellerman.id.au>
Date:   Wed, 16 Feb 2022 23:25:47 +1100
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 8bit
Precedence: bulk

On Fri, 24 Dec 2021 11:07:33 +0000, Christophe Leroy wrote:
> Commit 1f9ad21c3b38 ("powerpc/mm: Implement set_memory() routines")
> included a spin_lock() to change_page_attr() in order to
> safely perform the three step operations. But then
> commit 9f7853d7609d ("powerpc/mm: Fix set_memory_*() against
> concurrent accesses") modify it to use pte_update() and do
> the operation safely against concurrent access.
> 
> [...]

Applied to powerpc/next.

[1/2] powerpc/set_memory: Avoid spinlock recursion in change_page_attr()
      https://git.kernel.org/powerpc/c/a4c182ecf33584b9b2d1aa9dad073014a504c01f
[2/2] powerpc: Add set_memory_{p/np}() and remove set_memory_attr()
      https://git.kernel.org/powerpc/c/f222ab83df92acf72691a2021e1f0d99880dcdf1

cheers