linux-kernel - Re: [RFC} arm architecture board/feature deprecation timeline

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Message-ID: <f5e8b8ca-33c7-4725-b751-fc9d76959423@kernel.org>
Date: Thu, 1 Aug 2024 10:04:06 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, Russell King <linux@...linux.org.uk>,
 Linus Walleij <linus.walleij@...aro.org>,
 Richard Earnshaw <richard.earnshaw@....com>,
 Richard Sandiford <richard.sandiford@....com>,
 Ramana Radhakrishnan <ramanara@...dia.com>, Nicolas Pitre
 <nico@...xnic.net>, Mark Brown <broonie@...nel.org>,
 Kristoffer Ericson <kristoffer.ericson@...il.com>,
 Robert Jarzmik <robert.jarzmik@...e.fr>, Aaro Koskinen
 <aaro.koskinen@....fi>, Janusz Krzysztofik <jmkrzyszt@...il.com>,
 Tony Lindgren <tony@...mide.com>, linux-omap@...r.kernel.org,
 Nikita Shubin <nikita.shubin@...uefel.me>,
 linux-samsung-soc@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
 Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
 Gregory Clement <gregory.clement@...tlin.com>,
 "Jeremy J. Peper" <jeremy@...emypeper.com>, debian-arm@...ts.debian.org,
 Dmitry Torokhov <dmitry.torokhov@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>
Subject: Re: [RFC} arm architecture board/feature deprecation timeline

On 31/07/2024 19:29, Arnd Bergmann wrote:
> We removed a lot of the unused board files at the beginning of
> 2023, and I'd like to plan ahead for other hardware and feature
> support that can be removed after the next stable kernel
> (linux-6.12).
> 
> TL;DR: I think we can deprecate toolchain support for ARMv4
> (pre-thumb), iWMMXt, BE32 and OABI (-mabi=apcs-gnu) *if* that
> helps gcc-15, as we'll likely not need those any more after
> gcc-14 will be too old to build new kernels (ca. 2030).
> 
> I hope we can keep reducing the number of non-DT board files a
> lot further, but I still expect this to take several more years
> before it is DT-only. Please reply here if you are using any
> of them so we can spare them once more.

All this (and what was below the quote) looks reasonable to me,
including Samsung S3C64xx and keeping support for RPi 1 (I was using it
till ~3 years ago).

Best regards,
Krzysztof