linux-kernel - Re: [patch] timer_list should use signed numbers for relative times

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Message-ID: <20071127143530.GA18771@elf.ucw.cz>
Date:	Tue, 27 Nov 2007 15:35:30 +0100
From:	Pavel Machek <pavel@....cz>
To:	Andreas Schwab <schwab@...e.de>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	kernel list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, Andrew Morton <akpm@...l.org>
Subject: Re: [patch] timer_list should use signed numbers for relative times

On Tue 2007-11-27 15:19:27, Andreas Schwab wrote:
> Pavel Machek <pavel@....cz> writes:
> 
> > Hi!
> >
> >
> >> > Relative times are signed by nature, and timers can (briefly) have
> >> > expires in past. Print them as negative numbers.
> >> >
> >> > Signed-off-by: Pavel Machek <pavel@...e.cz>
> >> >
> >> > diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
> >> > index 12c5f4c..7f6eaa9 100644
> >> > --- a/kernel/time/timer_list.c
> >> > +++ b/kernel/time/timer_list.c
> >> > @@ -65,7 +65,7 @@ #ifdef CONFIG_TIMER_STATS
> >> >  	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
> >> >  #endif
> >> >  	SEQ_printf(m, "\n");
> >> > -	SEQ_printf(m, " # expires at %Lu nsecs [in %Lu nsecs]\n",
> >> > +	SEQ_printf(m, " # expires at %Lu nsecs [in %Ld nsecs]\n",
> >> >  		(unsigned long long)ktime_to_ns(timer->expires),
> >> >  		(unsigned long long)(ktime_to_ns(timer->expires) - now));
> >> 
> >> Perhaps change the cast as well.
> >
> > Well, that seems to be absolute time, so %Lu makes some sense...
> 
> I don't understand what this has to do with the cast.

Aha, stupid me, yes, you are right, fixed.
									Pavel

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