From: jak@rudolph.ccur.com (Joe Korty)
To: vojtech@suse.cz (Vojtech Pavlik)
Cc: george@mvista.com (george anzinger),
bjorn_helgaas@hp.com (Bjorn Helgaas),
marcelo@conectiva.com.br (Marcelo Tosatti),
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] joydev: fix HZ->millisecond transformation
Date: Fri, 20 Dec 2002 09:52:28 -0500 (EST) [thread overview]
Message-ID: <200212201452.OAA10431@rudolph.ccur.com> (raw)
In-Reply-To: <20021220142443.A26184@ucw.cz> from "Vojtech Pavlik" at Dec 20, 2002 02:24:43 PM
[ repost -- I am going to have to get outgoing mail fixed on my lkml-reading
machine ]
> On Fri, Dec 20, 2002 at 02:41:50AM -0800, george anzinger wrote:
>> Bjorn Helgaas wrote:
>>>
>>> * fix a problem with HZ->millisecond transformation on
>>> non-x86 archs (from 2.5 change by vojtech@suse.cz)
>>> [...]
>>> +#define MSECS(t) (1000 * ((t) / HZ) + 1000 * ((t) % HZ) / HZ)
>>> [...]
> Though it might be easier to say (1000 * t) / HZ, now that I think about
> it.
The more complex version avoids integer overflow for more values of 't'
in the (1000 * t) subexpression.
Joe
next prev parent reply other threads:[~2002-12-20 14:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-16 19:27 [PATCH] joydev: fix HZ->millisecond transformation Bjorn Helgaas
2002-12-20 10:41 ` george anzinger
2002-12-20 13:24 ` Vojtech Pavlik
2002-12-20 14:52 ` Joe Korty [this message]
2002-12-20 17:24 ` george anzinger
2002-12-20 17:35 ` Vojtech Pavlik
2002-12-20 18:16 ` george anzinger
2002-12-21 9:18 ` Vojtech Pavlik
2002-12-21 16:46 ` george anzinger
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