linux-kernel - Re: [PATCH v3 2/2] arch/*/io.h: remove ioremap

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Message-Id: <5dec69d0-0bc9-4f6c-8d0d-ee5422783100@app.fastmail.com>
Date:   Sun, 05 Mar 2023 21:10:31 +0100
From:   "Arnd Bergmann" <arnd@...db.de>
To:     "Geert Uytterhoeven" <geert@...ux-m68k.org>,
        "Michael Ellerman" <mpe@...erman.id.au>
Cc:     Linux-Arch <linux-arch@...r.kernel.org>,
        "Baoquan He" <bhe@...hat.com>, linux-sh@...r.kernel.org,
        linux-m68k@...ts.linux-m68k.org, linux-hexagon@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        "Christoph Hellwig" <hch@...radead.org>, linux-mm@...ck.org,
        "Luis Chamberlain" <mcgrof@...nel.org>,
        linux-parisc@...r.kernel.org, linux-alpha@...r.kernel.org,
        sparclinux@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v3 2/2] arch/*/io.h: remove ioremap_uc in some architectures

On Sun, Mar 5, 2023, at 10:29, Geert Uytterhoeven wrote:
>
> On Sun, Mar 5, 2023 at 10:23 AM Michael Ellerman <mpe@...erman.id.au> wrote:
>> Maybe that exact code path is only reachable on x86/ia64? But if so
>> please explain why.
>>
>> Otherwise it looks like this series could break that driver on powerpc
>> at least.
>
> Indeed.

When I last looked into this, I sent a patch to use ioremap()
on non-x86:

https://lore.kernel.org/all/20191111192258.2234502-1-arnd@arndb.de/

    Arnd