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Date: Fri, 26 Feb 2010 09:48:46 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: [PATCH] x86: Add optimized popcnt variants
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To: Borislav Petkov <bp@amd64.org>
Cc: Michal Marek <mmarek@suse.cz>, linux-kbuild <linux-kbuild@vger.kernel.org>, Peter Zijlstra <peterz@infradead.org>, Andrew Morton <akpm@linux-foundation.org>, Wu Fengguang <fengguang.wu@intel.com>, LKML <linux-kernel@vger.kernel.org>, Jamie Lokier <jamie@shareable.org>, Roland Dreier <rdreier@cisco.com>, Al Viro <viro@ZenIV.linux.org.uk>, "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>, Brian Gerst <brgerst@gmail.com>Andrew Morton <akpm@linux-foundation.org>

On 02/25/2010 11:47 PM, Borislav Petkov wrote:
> From: "H. Peter Anvin" <hpa@zytor.com>
> Date: Thu, Feb 25, 2010 at 09:27:25PM -0800
> 
>> OK, this patch looks pretty good now, but I'm completely lost as to
>> what the baseline of this patch is supposed to be.
> 
> Yeah, this is based on PeterZ's http://lkml.org/lkml/2010/2/4/119
> 
> But I'm not sure which tree has it...
> 

Looks like -mm, which really means that either Andrew has to take your
patch, too, or we have to wait until that is upstream until we can merge
your patch.

I'm a little nervous about just acking the patch and telling Andrew to
test it, because I don't know what the fallout would look like.  I'm
particularly concerned about gcc version dependencies.

I guess, on the other hand, if it ends up not getting merged until .35
it's not a huge deal either.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.