linux-kernel - Re: [PATCH 00/14] clean up asm/uaccess.h, kill set

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Date:   Mon, 14 Feb 2022 09:35:15 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Christoph Hellwig <hch@....de>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Linux API <linux-api@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>,
        Brian Cain <bcain@...eaurora.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michal Simek <monstr@...str.eu>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Stafford Horne <shorne@...il.com>,
        Helge Deller <deller@....de>,
        Michael Ellerman <mpe@...erman.id.au>,
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        linux-xtensa@...ux-xtensa.org
Subject: Re: [PATCH 00/14] clean up asm/uaccess.h, kill set_fs for good

On Mon, Feb 14, 2022 at 8:35 AM Arnd Bergmann <arnd@...nel.org> wrote:
>
> I did a patch for microblaze at some point, which turned out to be fairly
> generic, and now ported it to most other architectures, using new generic
> implementations of access_ok() and __{get,put}_kernel_nocheck().

Thanks for doing this.

Apart from the sparc64 issue with completely separate address spaces
(so access_ok() should always return true like Al pointed out), this
looks excellent to me.

Somebody should check that there aren't other cases like sparc64, but
let's merge this asap other than that.

              Linus