From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [PATCH 3/6] x86: Add support for the clwb instruction
Date: Thu, 13 Nov 2014 10:47:20 -0700
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To: Borislav Petkov <bp@alien8.de>
Cc: "Anvin, H Peter" <h.peter.anvin@intel.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, David Airlie <airlied@linux.ie>, "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>, "x86@kernel.org" <x86@kernel.org>
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On Wed, 2014-11-12 at 15:12 +0100, Borislav Petkov wrote:
> On Wed, Nov 12, 2014 at 01:38:45PM +0000, Anvin, H Peter wrote:
> > No, it doesn't.  x86 requires 3.4+ at a minimum.
> 
> The only test I see is:
> 
> #if GCC_VERSION < 30200
> # error Sorry, your compiler is too old - please upgrade it.
> #endif
> 
> And even if we do require 3.4, the build fails with 4.1+ so...

Ah, dang, you're right.  Okay, I'll figure out how to do this without
using xsaveopt.

Thank you for pointing this out.

- Ross