linux-kernel - Re: [RFC PULL] remove arch/h8300

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Message-ID: <20220405212653.GA2482665@roeck-us.net>
Date:   Tue, 5 Apr 2022 14:26:53 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        "moderated list:H8/300 ARCHITECTURE" 
        <uclinux-h8-devel@...ts.sourceforge.jp>,
        "open list:TENSILICA XTENSA PORT (xtensa)" 
        <linux-xtensa@...ux-xtensa.org>, Max Filippov <jcmvbkbc@...il.com>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Damien Le Moal <damien.lemoal@....com>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [RFC PULL] remove arch/h8300

On Mon, Apr 04, 2022 at 03:07:06PM +0200, Arnd Bergmann wrote:
> On Sun, Apr 3, 2022 at 2:43 PM Christoph Hellwig <hch@...radead.org> wrote:
> >
> > On Tue, Mar 08, 2022 at 09:19:16AM +0100, Arnd Bergmann wrote:
> > > If there are no other objections, I'll just queue this up for 5.18 in
> > > the asm-generic
> > > tree along with the nds32 removal.
> >
> > So it is the last day of te merge window and arch/h8300 is till there.
> > And checking nw the removal has also not made it to linux-next.  Looks
> > like it is so stale that even the removal gets ignored :(
> 
> I was really hoping that someone else would at least comment.
> I've queued it up now for 5.19.
> 
> Should we garbage-collect some of the other nommu platforms where
> we're here? Some of them are just as stale:
> 
> 1. xtensa nommu has does not compile in mainline and as far as I can
> tell never did
>    (there was https://github.com/jcmvbkbc/linux-xtensa/tree/xtensa-5.6-esp32,
> which
>    worked at some point, but I don't think there was enough interest
> to get in merged)

Hmm, I build and test nommu_kc705_defconfig in my test system.

> 
> 2. arch/sh Hitachi/Renesas sh2 (non-j2) support appears to be in a similar state
>     to h8300, I don't think anyone would miss it
> 
> 8<----- This may we where we want to draw the line ----
> 
> 3. arch/sh j2 support was added in 2016 and doesn't see a lot of
> changes, but I think
>     Rich still cares about it and wants to add J32 support (with MMU)
> in the future
> 
> 4. m68k Dragonball, Coldfire v2 and Coldfire v3 are just as obsolete as SH2 as
>    hardware is concerned, but Greg Ungerer keeps maintaining it, along with the
>    newer Coldfire v4 (with MMU)
> 
> 5. K210 was added in 2020. I assume you still want to keep it.
> 
> 7. Arm32 has several Cortex-M based platforms that are mainly kept for
>     legacy users (in particular stm32) or educational value.
> 
I do build and test mps2_defconfig with qemu's mps2-an385 emulation.

I am not saying that those are actively used, and I don't mind dropping
them, but they do still work.

Guenter