linux-kernel - Re: [PATCH tip/core/timers 3/4] timers: Reduce future __run

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Message-ID: <20140115234108.GL10038@linux.vnet.ibm.com>
Date:	Wed, 15 Jan 2014 15:41:08 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, dhowells@...hat.com, edumazet@...gle.com,
	darren@...art.com, fweisbec@...il.com, oleg@...hat.com, sbw@....edu
Subject: Re: [PATCH tip/core/timers 3/4] timers: Reduce future __run_timers()
 latency for newly emptied list

On Wed, Jan 15, 2014 at 03:54:05PM -0500, Steven Rostedt wrote:
> On Tue, 14 Jan 2014 21:20:47 -0800
> "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:
> 
> 
> > diff --git a/kernel/timer.c b/kernel/timer.c
> > index 295837e5e011..bdd1c00ec4ec 100644
> > --- a/kernel/timer.c
> > +++ b/kernel/timer.c
> > @@ -700,6 +700,7 @@ static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
> >  			base->next_timer = base->timer_jiffies;
> >  	}
> >  	base->all_timers--;
> > +	(void)catchup_timer_jiffies(base);
> 
> Why the "(void)" ?

Just a way of saying "I really did intend to ignore the return value."

							Thanx, Paul

> -- Steve
> 
> >  	return 1;
> >  }
> >  
> 

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