linux-kernel - Re: x86: Clean up computation of HPET .mult variables

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Message-Id: <1210044218.17132.109.camel@localhost.localdomain>
Date:	Mon, 05 May 2008 20:23:38 -0700
From:	Daniel Walker <dwalker@...sta.com>
To:	"Carlos R. Mafra" <crmafra2@...il.com>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	venkatesh.pallipadi@...el.com
Subject: Re: x86: Clean up computation of HPET .mult variables


On Mon, 2008-05-05 at 23:13 -0300, Carlos R. Mafra wrote:
> So the savings in my patch is due to using the period directly, and
> not the frequency. That's what my idea was, so if you object then
> my attempt was a failure and should be forgotten :-)
> 
> Or maybe I should create a clocksource_period2mult to replace 
> clocksource_hz2mult and save the extra operation in more places too?

The one concern I have is the rounding that is done in the
clocksource_hz2mult(). The div_sc doesn't include it .. You could add a
clocksource_period2mult(), that would help out any one later that has a
period instead of hz ..

Daniel

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