linux-kernel - Re: [git pull] scheduler updates for v2.6.27, phase #2

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Message-Id: <1216896193.7257.267.camel@twins>
Date:	Thu, 24 Jul 2008 12:43:13 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Daniel Walker <dwalker@...sta.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [git pull] scheduler updates for v2.6.27, phase #2

On Mon, 2008-07-21 at 13:16 -0700, Daniel Walker wrote:
> On Mon, 2008-07-21 at 21:23 +0200, Peter Zijlstra wrote:
> 
> > Does this work for you?
> > 
> 
> Yours removed the warning .. I made an alternate one below only compile
> tested, your choice..

How about this one - it seems there is a whole scala of new division
instructions these days... :-)

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>


diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 47ceac9..3c38686 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -253,7 +253,7 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
 
 		diff = iter->rt_runtime - iter->rt_time;
 		if (diff > 0) {
-			do_div(diff, weight);
+			diff = div_u64((u64)diff, weight);
 			if (rt_rq->rt_runtime + diff > rt_period)
 				diff = rt_period - rt_rq->rt_runtime;
 			iter->rt_runtime -= diff;


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