linux-kernel - Re: enable dual rng on VIA C7

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Message-ID: <474C699D.9000501@xs4all.nl>
Date:	Tue, 27 Nov 2007 20:01:49 +0100
From:	Udo van den Heuvel <udovdh@...all.nl>
To:	Dave Jones <davej@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Michael Buesch <mb@...sch.de>,
	folkert van Heusden <folkert@...heusden.com>
Subject: Re: enable dual rng on VIA C7

Dave Jones wrote:
>  > > Something like this perhaps ?
>  > 
>  > Yes, I think that's a big step in the right direction!
>  > 
>  > But I am no expert and cannot really judge how necessary or correct the
>  > implementation is w.r.t. the 'undefined' function bits for CPU's that
>  > lack a certain feature.
> 
> The checks at the end of the patch for the x86_mask/model ensure
> we only enable the 2nd noise source on CPUs documented to have it,
> so we should be safe.
> 
> Andrew, want to throw that in the -mm pile for a while?

Thanks for assuring we are 'safe'.
Sounds OK to me.
Thanks for picking up this tiny improvement.

Any ideas on the power consumption increase question I received w.r.t.
this patch? (or why VIA would have made the 2nd RNG switchable)
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