linux-kernel - Re: [PATCH] posix-timers: CLOCK_MONOTONIC_RAW: fix the usage of ->it

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Date:	Sat, 20 Dec 2008 21:24:25 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Eric Sesterhenn <snakebyte@....de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] posix-timers: CLOCK_MONOTONIC_RAW: fix the usage of
	->it_clock

On 12/20, Thomas Gleixner wrote:
>
> On Sat, 20 Dec 2008, Oleg Nesterov wrote:
>
> > -static int common_timer_create(struct k_itimer *new_timer)
> > +static inline int
> > +__common_timer_init(struct k_itimer *timer, enum hrtimer_mode mode)
> >  {
> > -	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
> > +	clockid_t clock_id = timer->it_clock ?
> > +				CLOCK_MONOTONIC : CLOCK_REALTIME;
> > +	hrtimer_init(&timer->it.real.timer, clock_id, mode);
> >  	return 0;
> >  }
>
> No, this is wrong. We do not want to create a timer for
> CLOCK_MONOTONIC_RAW.

OK, thanks.

I thought that the intent was to allow the creation.

Then we should we shoould add clock_monotonic_raw->timer_create()
which returns -EINVAL ?

Oleg.

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