linux-kernel - Re: [GIT PULL] arch: remove obsolete architecture ports

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Date:   Wed, 4 Apr 2018 14:28:16 +0100
From:   James Hogan <jhogan@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Pavel Machek <pavel@....cz>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        David Howells <dhowells@...hat.com>,
        "moderated list:PANASONIC MN10300..." <linux-am33-list@...hat.com>,
        Hirokazu Takata <takata@...ux-m32r.org>,
        Lennox Wu <lennox.wu@...il.com>,
        Aaron Wu <Aaron.Wu@...log.com>, Bryan Wu <cooloney@...il.com>,
        Chris Metcalf <chris.d.metcalf@...il.com>,
        Jesper Nilsson <jesper.nilsson@...s.com>
Subject: Re: [GIT PULL] arch: remove obsolete architecture ports

On Wed, Apr 04, 2018 at 10:38:41AM +0200, Arnd Bergmann wrote:
> Also, now that the other architectures are gone, a lot of changes can
> be done more easily that will be incompatible with a pure revert, so
> the more time passes, the harder it will get to do that.

Yes, and an out-of-tree arch port (as effectively these arches now are)
requires constant maintenance (often subtle runtime breakage) to keep up
to date with each new kernel release, which happens mostly automatically
from arch maintainer POV while they're merged.

Even without changes intentionally taking advantage of not having to
care about these arches, it'll be only a few cycles at the most before a
plain revert won't "just work".

Cheers
James

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