linux-kernel - Re: [PATCH 01/10] x86: add support for multiple choice alternatives

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Message-ID: <4B7D9913.2090305@zytor.com>
Date:	Thu, 18 Feb 2010 11:46:27 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Luca Barbieri <luca@...a-barbieri.com>, mingo@...e.hu,
	a.p.zijlstra@...llo.nl, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/10] x86: add support for multiple choice alternatives

On 02/17/2010 04:47 AM, Avi Kivity wrote:
> On 02/17/2010 01:42 PM, Luca Barbieri wrote:
>> This patch modifies the x86 alternative macros to allow more than one
>> alternative code sequence.
>>
> Suggest documenting the precedence of alternatives: if both feature1 and 
> feature2 are present, which newinstr is patched in?
> 

Looks like the last one in the sequence takes effect, which is
consistent with the operation of the single ALTERNATIVE() macro ...
anything else would be quite lunacy.

	-hpa
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