From: george anzinger <george@mvista.com>
To: Matti Aarnio <matti.aarnio@zmailer.org>
Cc: Thomas Schlichter <schlicht@uni-mannheim.de>,
linux-kernel@vger.kernel.org
Subject: Re: problem using integer division in kernel modules
Date: Tue, 21 Jan 2003 01:26:29 -0800 [thread overview]
Message-ID: <3E2D1245.131E41DB@mvista.com> (raw)
In-Reply-To: 20030115191122.GV27709@mea-ext.zmailer.org
Matti Aarnio wrote:
>
> On Wed, Jan 15, 2003 at 07:41:29PM +0100, Thomas Schlichter wrote:
> > Hi,
> >
> > I am writing at a small kernel module and have a problem now using / and %. If
> > I do so I get following unresolved symbols when the module should be loaded:
> > __divdi3
> > __moddi3
>
> 64-bit division with non-constant non-power-of-two divider.
>
> > Could you please help me and tell me what I do wrong..?
>
> The kernel is linked without gcc builtin libraries.
> Reasons can be found from FAQ (see footer), or archives.
You may want to check out .../include/asm-???/div64.h. It
allows some limited divides with 64-bit numbers. Look at
several so you understand what it does and does not do.
-g
>
> /Matti Aarnio
> -
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--
George Anzinger george@mvista.com
High-res-timers:
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
prev parent reply other threads:[~2003-01-21 9:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-15 18:41 problem using integer division in kernel modules Thomas Schlichter
2003-01-15 19:11 ` Matti Aarnio
2003-01-21 9:26 ` george anzinger [this message]
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