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[Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been

To: Jason Baron <jbaron@xxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH RFC V2 3/5] jump_label: if a key has already been initialized, don't nop it out
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
Date: Thu, 06 Oct 2011 11:35:49 -0700
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Jan Glauber <jang@xxxxxxxxxxxxxxxxxx>, peterz@xxxxxxxxxxxxx, David Daney <david.daney@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, rth@xxxxxxxxxx, Michael Ellerman <michael@xxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>
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On 10/06/2011 11:33 AM, Jason Baron wrote:
> 
> cool. It does add some complication, I think...detecting the 2-byte vs.
> 5-byte, and if done at boot time, possibly taking the undesired
> branch...
> 

It has to be done at build time to be sane, IMO.

        -hpa

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


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