linux-kernel - Re: [PATCH tip/core/rcu 2/3] Apply results of code inspection of kernel/rcutree

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Message-ID: <20090918172251.GC6767@linux.vnet.ibm.com>
Date:	Fri, 18 Sep 2009 10:22:51 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Daniel Walker <dwalker@...o99.com>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org,
	dvhltc@...ibm.com, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu
Subject: Re: [PATCH tip/core/rcu 2/3] Apply results of code inspection of
	kernel/rcutree_plugin.h

On Fri, Sep 18, 2009 at 09:58:20AM -0700, Daniel Walker wrote:
> On Fri, 2009-09-18 at 09:50 -0700, Paul E. McKenney wrote:
> 
> > diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
> > index 2b996c3..a2d586c 100644
> > --- a/kernel/rcutree_plugin.h
> > +++ b/kernel/rcutree_plugin.h
> > @@ -117,9 +117,9 @@ static void rcu_preempt_note_context_switch(int cpu)
> >  		 * on line!
> >  		 */
> >  	    	WARN_ON_ONCE((rdp->grpmask & rnp->qsmaskinit) == 0);
> > -		phase = !(rnp->qsmask & rdp->grpmask) ^ (rnp->gpnum & 0x1);
> > +	    	WARN_ON_ONCE(!list_empty(&t->rcu_node_entry));
> > +		phase = (rnp->gpnum + !(rnp->qsmask & rdp->grpmask)) & 0x1;
> >  		list_add(&t->rcu_node_entry, &rnp->blocked_tasks[phase]);
> > -		smp_mb();  /* Ensure later ctxt swtch seen after above. */
> >  		spin_unlock_irqrestore(&rnp->lock, flags);
> >  	}
> 
> ERROR: code indent should use tabs where possible
> #149: FILE: kernel/rcutree_plugin.h:120:
> +^I    ^IWARN_ON_ONCE(!list_empty(&t->rcu_node_entry));$
> 
> One funny indent in the line above.. If your intending for Ingo to take
> this he might just fix it on apply ..

I will be submitting a patch shortly to clean up the whitespace errors
in the include/linux/rcu* and kernel/rcu* files.

							Thanx, Paul
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