linux-kernel - Re: 64-bit modulus operation in a 32-bit kernel

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Message-ID: <Pine.LNX.4.44L0.1204241455230.1511-100000@iolanthe.rowland.org>
Date:	Tue, 24 Apr 2012 14:57:02 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Takashi Iwai <tiwai@...e.de>
cc:	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: 64-bit modulus operation in a 32-bit kernel

On Tue, 24 Apr 2012, Takashi Iwai wrote:

> At Tue, 24 Apr 2012 13:50:01 -0400 (EDT),
> Alan Stern wrote:
> > 
> > I need to compute the remainder when a 64-bit quantity is divided by a 
> > small value (126 in this case).  The % operator doesn't work in an 
> > x86/32 kernel.  What's the Right Way to do it?
> 
> div_u64_rem() in linux/math64.h?

Thanks for the pointer.

Alan Stern

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