linux-kernel - Re: [PATCH 2/2] ARM: remove support for NOMMU ARMv4/v5

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Date:   Tue, 15 Mar 2022 00:00:09 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Robin Murphy <robin.murphy@....com>,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        kernel test robot <lkp@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mark Rutland <mark.rutland@....com>,
        Vladimir Murzin <vladimir.murzin@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
        Anshuman Khandual <anshuman.khandual@....com>
Subject: Re: [PATCH 2/2] ARM: remove support for NOMMU ARMv4/v5

On Thu, Mar 10, 2022 at 10:23 AM Arnd Bergmann <arnd@...nel.org> wrote:
> On Thu, Mar 10, 2022 at 2:22 AM Linus Walleij <linus.walleij@...aro.org> wrote:

> > Just delete these, I do have these CPU tiles around but they are so obscure
> > and I never got around to even testing to boot them.
>
> Right, of course you couldn't boot test them because it has been
> impossible to even select them in Kconfig for years.

Correct, I mean never got around to the whole cycle of "let's make this
thing boot" and then stumbling over things like that :D

> I've added
> a patch to completely remove the five v4/v5 NOMMU cores now,
> will send that later.

Excellent.

> There are five more cores that are only referenced by mach-integrator
> that are supposed to work (922T, 1020, 1020E, 1022, 1026). Have you
> ever tested those, or should we consider removing them as well?

Not the 10xx variants, but 920T and 922T I have tested and I
still have the tiles, while my favourite tile that is usually fitted is
ARM926EJ-S.

Yours,
Linus Walleij