linux-kernel - Re: [PATCH 3/6] x86: Add support for the clwb instruction

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Message-ID: <20141112141250.GE16807@pd.tnic>
Date:	Wed, 12 Nov 2014 15:12:50 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Anvin, H Peter" <h.peter.anvin@...el.com>
Cc:	Ross Zwisler <ross.zwisler@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	David Airlie <airlied@...ux.ie>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"x86@...nel.org" <x86@...nel.org>
Subject: Re: [PATCH 3/6] x86: Add support for the clwb instruction

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...

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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