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Re: [Xen-devel] [PATCH 2/2] x86: fix asm() constraint for GS selector update

To: Jan Beulich <JBeulich@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Date: Thu, 26 Oct 2017 12:07:12 +0100
Cc: Julien Grall <julien.grall@xxxxxxx>
Delivery-date: Thu, 26 Oct 2017 11:07:28 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On 26/10/17 08:57, Jan Beulich wrote:
> Exception fixup code may alter the operand, which ought to be reflected
> in the constraint.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Hopefully this won't have caused us any real problems in the past.

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References:
- [Xen-devel] [PATCH 0/2] x86: further GS handling fixes
  - From: Jan Beulich
- [Xen-devel] [PATCH 2/2] x86: fix asm() constraint for GS selector update
  - From: Jan Beulich

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