linux-kernel - Re: [PATCH v2 0/2] ARM: decompressor: support AUTO

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Message-ID: <CAD++jLkfcVSeKf9eNzXpe2AUD-7Gaw47gxHwqZtLuomWed1u8Q@mail.gmail.com>
Date: Wed, 4 Feb 2026 10:49:24 +0100
From: Linus Walleij <linusw@...nel.org>
To: Marc Zyngier <maz@...nel.org>
Cc: "Christian Marangi (Ansuel)" <ansuelsmth@...il.com>, "Russell King (Oracle)" <linux@...linux.org.uk>, 
	Geert Uytterhoeven <geert@...ux-m68k.org>, Linus Walleij <linus.walleij@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>, Andrew Morton <akpm@...ux-foundation.org>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Thomas Gleixner <tglx@...utronix.de>, 
	Jonathan Corbet <corbet@....net>, "Mike Rapoport (IBM)" <rppt@...nel.org>, 
	Eric DeVolder <eric.devolder@...cle.com>, Nathan Chancellor <nathan@...nel.org>, 
	Kees Cook <keescook@...omium.org>, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konrad.dybcio@...ainline.org>, John Crispin <john@...ozen.org>
Subject: Re: [PATCH v2 0/2] ARM: decompressor: support AUTO_ZRELADDR and
 appended DTB

On Wed, Feb 4, 2026 at 10:24 AM Marc Zyngier <maz@...nel.org> wrote:

> > Another reason would be that appended DTB is in the same
> > league as the GPIO sysfs despite we GPIO maintainers hate it:
> > a feature users highly desire because it's easy and convenient
> > and practical and quick and thus refuse to let us drop. Every time
> > we try to deprecate it more we get a good beating.
>
> I don't think appended DTB is ABI. The GPIO sysfs definitely is.

The reason the GPIO sysfs is demanded is not so much because
of ABI, like if applications are using it.

It's more about developers wanting to play with their systems
interactively to figure things out or do makerspace projects
using GPIO.

Likewise I think appended DTB is appealing to developers because...
"it boots, ship it". ;)

Yours,
Linus Walleij