From: Daniel Walker <dwalker@mvista.com>
To: "Carlos R. Mafra" <crmafra2@gmail.com>
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
venkatesh.pallipadi@intel.com
Subject: Re: x86: Clean up computation of HPET .mult variables
Date: Mon, 05 May 2008 16:58:08 -0700 [thread overview]
Message-ID: <1210031888.17132.85.camel@localhost.localdomain> (raw)
In-Reply-To: <20080505231016.GA29072@beyonder.ift.unesp.br>
On Mon, 2008-05-05 at 20:11 -0300, Carlos R. Mafra wrote:
> - tmp = (u64)hpet_period << HPET_SHIFT;
> - do_div(tmp, FSEC_PER_NSEC);
> - clocksource_hpet.mult = (u32)tmp;
> + clocksource_hpet.mult = div_sc(hpet_period, FSEC_PER_NSEC, HPET_SHIFT);
>
There's helper functions that should be used called clocksource_hz2mult
and one called clocksource_khz2mult. I think they're more accurate than
using div_sc.
Daniel
next prev parent reply other threads:[~2008-05-05 23:58 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-05 23:11 x86: Clean up computation of HPET .mult variables Carlos R. Mafra
2008-05-05 23:58 ` Daniel Walker [this message]
2008-05-06 2:13 ` Carlos R. Mafra
2008-05-06 3:23 ` Daniel Walker
2008-05-06 12:59 ` Carlos R. Mafra
2008-05-06 16:21 ` Daniel Walker
2008-05-06 20:50 ` Carlos R. Mafra
2008-05-07 2:17 ` Daniel Walker
2008-05-07 3:39 ` Carlos R. Mafra
2008-05-07 4:21 ` Daniel Walker
2008-05-07 7:13 ` Ingo Molnar
2008-05-06 12:43 ` Ingo Molnar
2008-05-06 13:13 ` Carlos R. Mafra
2008-05-06 18:51 ` rtc-cmos.c: Build fix Carlos R. Mafra
2008-05-07 7:10 ` Ingo Molnar
2008-05-07 21:31 ` Andrew Morton
2008-05-09 8:32 ` Ingo Molnar
2008-05-09 12:33 ` Carlos R. Mafra
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