linux-kernel - Re: [PATCH] mm: Replace READ_ONCE() with standard page table accessors

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Message-ID: <c26dbbf7-8475-4424-8e73-b35a845a2949@arm.com>
Date: Tue, 7 Oct 2025 15:23:23 +0530
From: Dev Jain <dev.jain@....com>
To: Anshuman Khandual <anshuman.khandual@....com>, linux-mm@...ck.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
 David Hildenbrand <david@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: Replace READ_ONCE() with standard page table
 accessors


On 07/10/25 1:24 pm, Anshuman Khandual wrote:
>
> On 07/10/25 12:41 PM, Dev Jain wrote:
>> On 07/10/25 12:01 pm, Anshuman Khandual wrote:
>>> Replace all READ_ONCE() with a standard page table accessors i.e pxdp_get()
>>> that defaults into READ_ONCE() in cases where platform does not override.
>> Does any platform override into something else currently? The way you write
>> the description implies that.
> That's how the callbacks have been designed to be overridden when required.

What I mean is, if currently some arch is overriding into something else,
this patch will be a functional change. So it is beneficial to say
in the description that the patch is a safeguard for when the platform
chooses to override, and no functional change is intended.

Reviewed-by: Dev Jain <dev.jain@....com>

>>