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Date: Sat, 30 May 2009 12:31:11 +0200
From: Borislav Petkov <petkovbb@googlemail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <petkovbb@googlemail.com>,
       Borislav Petkov <borislav.petkov@amd.com>, greg@kroah.com,
       mingo@elte.hu, norsk5@yahoo.com, tglx@linutronix.de, hpa@zytor.com,
       mchehab@redhat.com, aris@redhat.com, edt@aei.ca,
       linux-kernel@vger.kernel.org, randy.dunlap@oracle.com
Subject: Re: [PATCH 0/4] amd64_edac: misc fixes
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On Sat, May 30, 2009 at 01:40:07AM -0700, Andrew Morton wrote:
> On Sat, 30 May 2009 10:19:54 +0200 Borislav Petkov <petkovbb@googlemail.com> wrote:
> 
> > Also, I've been thinking about how the old(er)
> > toolchain problem can be addressed and one fairly doable thing would be
> > if I'd query the gas version in the kernel Makefile and define popcnt
> > dependent on it and for older assemblers simply slap in the opcode and
> > fixate the operands in an inline assembly so that it works.
> 
> We've done that before.  BUG() is one case (for other reasons), I think.
> 
> But if we have the code in there which uese the literal opcode, there's
> no need to query gas or to add the conditional.

Right, we can do that too. Stay tuned.

> Is popcnt supported on all CPUs?

All >= Fam10h.

-- 
Regards/Gruss,
    Boris.