linux-kernel - Re: [PATCH v2 0/4] Introduce and use absolute

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Date:   Sat, 18 Sep 2021 15:09:12 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Ulrich Teichert <krypton@...ich-teichert.org>
Cc:     Michael Cree <mcree@...on.net.nz>,
        Guenter Roeck <linux@...ck-us.net>,
        Richard Henderson <rth@...ddle.net>,
        Ivan Kokshaysky <ink@...assic.park.msu.ru>,
        Matt Turner <mattst88@...il.com>,
        "James E . J . Bottomley" <James.Bottomley@...senpartnership.com>,
        Helge Deller <deller@....de>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        alpha <linux-alpha@...r.kernel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-parisc@...r.kernel.org, Netdev <netdev@...r.kernel.org>,
        Sparse Mailing-list <linux-sparse@...r.kernel.org>
Subject: Re: [PATCH v2 0/4] Introduce and use absolute_pointer macro

On Sat, Sep 18, 2021 at 1:26 PM Ulrich Teichert
<krypton@...ich-teichert.org> wrote:
>
> I was just tinkering with it to get it compiled without warning,
> I certainly didn't get the big picture :-/

Ok, you shamed me into some tinkering too, and I fixed a couple of
issues with the alpha build.

The whole "pci_iounmap()" mess is not something I solved (you were
cc'd on the email I sent out about that), but I did test a few
different Jensen configurations and fixed a couple of uglies.

So at least _some_ Jensen configurations build cleanly once more, and
I re-enabled JENSEN as a valid machine target.

But if it doesn't boot, it's all fairly moot. And those things are a
pain to debug, and if the last booting kernel was years and years ago,
I don't think it realistically will necessarily ever be fixed.

Oh well. I have an odd love-hate relationship with alpha.

I think it's one of the worst architectures ever designed (memory
ordering is completely broken, and the lack of byte operations in the
original specs were a big reason for the initial problems and eventual
failure).

But at the same time, I really did enjoy it back in the day, and it
_was_ the first port I did, and the first truly integrated kernel
architecture (the original Linux m68k port that preceded it was a
"hack up and replace" job rather than "integrate")

           Linus