linux-kernel - Re: [PATCH 11/14] sparc64: remove CONFIG_SET

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Message-ID: <CAK8P3a30supB-MNzhoELOerOemxwTfDFFqZrzmNDQA=WW+VLbw@mail.gmail.com>
Date:   Wed, 16 Feb 2022 14:07:00 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Al Viro <viro@...iv.linux.org.uk>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Christoph Hellwig <hch@....de>,
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Subject: Re: [PATCH 11/14] sparc64: remove CONFIG_SET_FS support

On Tue, Feb 15, 2022 at 1:48 AM Al Viro <viro@...iv.linux.org.uk> wrote:
>
> On Mon, Feb 14, 2022 at 05:34:49PM +0100, Arnd Bergmann wrote:
>
> > -/*
> > - * Sparc64 is segmented, though more like the M68K than the I386.
> > - * We use the secondary ASI to address user memory, which references a
> > - * completely different VM map, thus there is zero chance of the user
> > - * doing something queer and tricking us into poking kernel memory.
>
> Actually, this part of comment probably ought to stay - it is relevant
> for understanding what's going on (e.g. why is access_ok() always true, etc.)

Ok, I've put it back now.

       Arnd