linux-kernel - Re: [PATCH] common implementation of iterative div/mod

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Message-ID: <482AA3BD.1030600@firstfloor.org>
Date:	Wed, 14 May 2008 10:33:01 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Segher Boessenkool <segher@...nel.crashing.org>,
	Robert Hancock <hancockr@...w.ca>,
	Christian Kujau <lists@...dbynature.de>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	john stultz <johnstul@...ibm.com>
Subject: Re: [PATCH] common implementation of iterative div/mod

Jeremy Fitzhardinge wrote:

> 
> arch/x86/vdso/vclock_gettime.c has its own copies of other kernel
> functions which it can't directly call.  We could add
> timespec_add_ns()/iter_div_u64_rem() to that list, though its pretty
> hacky.  Could we link lib/div64.o into the vdso?

You would need to annotate it and have a separate object file for the
different sections. Also it would need to be compiled PIC.

Inlining is better.

-Andi

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