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

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Message-ID: <m2lillj60o.fsf@igel.home>
Date:	Tue, 24 Apr 2012 21:15:19 +0200
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Kernel development list <linux-kernel@...r.kernel.org>
Subject: Re: 64-bit modulus operation in a 32-bit kernel

Alan Stern <stern@...land.harvard.edu> writes:

> 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?

#include <asm/div64.h>

do_div(n,base) returns the remainder.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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