linux-kernel - Re: [3.1 patch] x86: default to vsyscall=native

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Message-ID: <CA+55aFyskjs9qPkoFom16veQXy5a-beWF95A7mCFexqanRiiKQ@mail.gmail.com>
Date:	Thu, 6 Oct 2011 11:34:41 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Andrew Lutomirski <luto@....edu>
Cc:	richard -rw- weinberger <richard.weinberger@...il.com>,
	Adrian Bunk <bunk@...sta.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [3.1 patch] x86: default to vsyscall=native

On Thu, Oct 6, 2011 at 11:16 AM, Andrew Lutomirski <luto@....edu> wrote:
>
> Fixing it will be annoying because the attached fancier version needs
> to work, too.  I could implement the whole mess in software, but it
> might be nicer to arrange for uaccess errors to stash some information
> somewhere (like in the thread_struct cr2 variable).

That should be easy enough to do. Just add it to the
"fixup_exception()" case in no_context().

                Linus
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