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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Fri, 12 Nov 2021 13:24:37 -0800
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Subject: Re: [PATCH 09/20] signal/vm86_32: Replace open coded BUG_ON with an
 actual BUG_ON
To:     "Eric W. Biederman" <ebiederm@xmission.com>
Cc:     Brian Gerst <brgerst@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Oleg Nesterov <oleg@redhat.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Kees Cook <keescook@chromium.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "the arch/x86 maintainers" <x86@kernel.org>,
        H Peter Anvin <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>
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On Fri, Nov 12, 2021 at 1:23 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> But I could see some quick test hack doing it - the IVT at boot is
> actually not at zero, but at fffxxxxx. 8086 is magic.

.. and it's been too long, and I'm too lazy to check - it may be that
vm86 mode doesn't even do that magic boot-time address thing.

It's not like we really care about vm86 mode any more, since pretty
much nobody users it.

                  Linus