linux-kernel - Re: [PATCH 0/4] apply page shift to PFN instead of VA in pfn_to

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Date: Fri, 02 Feb 2024 08:27:44 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Geert Uytterhoeven" <geert@...ux-m68k.org>
Cc: "Yan Zhao" <yan.y.zhao@...el.com>,
 "Linus Walleij" <linus.walleij@...aro.org>, guoren <guoren@...nel.org>,
 "Brian Cain" <bcain@...cinc.com>, "Jonas Bonn" <jonas@...thpole.se>,
 "Stefan Kristiansson" <stefan.kristiansson@...nalahti.fi>,
 "Stafford Horne" <shorne@...il.com>, Linux-Arch <linux-arch@...r.kernel.org>,
 linux-kernel@...r.kernel.org,
 "linux-csky@...r.kernel.org" <linux-csky@...r.kernel.org>,
 linux-hexagon@...r.kernel.org,
 "linux-openrisc@...r.kernel.org" <linux-openrisc@...r.kernel.org>
Subject: Re: [PATCH 0/4] apply page shift to PFN instead of VA in pfn_to_virt

On Thu, Feb 1, 2024, at 11:46, Geert Uytterhoeven wrote:
> Hi Arnd,
>
> On Thu, Feb 1, 2024 at 11:11 AM Arnd Bergmann <arnd@...db.de> wrote:
>> I think it's fair to assume we won't need asm-generic/page.h any
>> more, as we likely won't be adding new NOMMU architectures.
>
> So you think riscv-nommu (k210) was the last one we will ever see?

Yes. We've already removed half of the nommu architectures
(blackfin, avr32, h8300, m32r, microblaze-nommu)  over
the past couple of years, and the remaining ones are pretty
much only there to support existing users.

The only platform one that I see getting real work is
esp32 [1], but that is not a new architecture.

     Arnd

[1] https://github.com/jcmvbkbc/linux-xtensa/tree/xtensa-6.8-rc2-esp32