linux-kernel - Re: [ANNOUNCE] 3.12.5-rt6

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Date:	Tue, 17 Dec 2013 15:26:16 +0100
From:	Mike Galbraith <bitbucket@...ine.de>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Kacur <jkacur@...hat.com>
Subject: Re: [ANNOUNCE] 3.12.5-rt6

On Tue, 2013-12-17 at 09:16 -0500, Steven Rostedt wrote: 
> 
> > @@ -1129,11 +1127,8 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state)
> >  		 * is actually now running somewhere else!
> >  		 */
> >  		while (task_running(rq, p)) {
> > -			if (match_state) {
> > -				if (!unlikely(check_task_state(p, match_state)))
> > -					return 0;
> > +			if (match_state && !check_task_state(p, match_state))
> 
> Ah, it was that "!unlikely(" that caused me to miss the '!'. That
> should have been: likely(!check_task_state()). But anyway, I rather
> just keep what you wrote and drop the unlikely altogether.

Maybe better would be to put the thing back inline, with a brief
reference to the race.

-Mike

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