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Subject: Re: [PATCH] Use correct byte-sized register constraint in __xchg_op()
From: Josh Boyer <jwboyer@gmail.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: "the arch/x86 maintainers" <x86@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Thomas Reitmayr <treitmayr@devbase.at>, leigh123linux@googlemail.com,
        Dave Jones <davej@redhat.com>
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On Mon, Apr 2, 2012 at 7:15 PM, Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> x86-64 can access the low half of any register, but i386 can only do
> it with a subset of registers.  'r' causes compilation failures on i386,
> but 'q' expresses the constraint properly.
>
> Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
> Reported-by: Leigh Scott <leigh123linux@googlemail.com>
> Tested-by: Thomas Reitmayr <treitmayr@devbase.at>

This should be CC'd to stable, given the bug shows up in 3.3, right?

josh