linux-kernel - Re: [patch 03/23] GTOD: persistent clock support, i386

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Date:	Mon, 2 Oct 2006 15:44:32 -0700
From:	Andrew Morton <akpm@...l.org>
To:	john stultz <johnstul@...ibm.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Jim Gettys <jg@...top.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [patch 03/23] GTOD: persistent clock support, i386

On Mon, 02 Oct 2006 15:03:37 -0700
john stultz <johnstul@...ibm.com> wrote:

>  static int timer_resume(struct sys_device *dev)
>  {
> -	unsigned long flags;
> -	unsigned long sec;
> -	unsigned long ctime = get_cmos_time();
> -	long sleep_length = (ctime - sleep_start) * HZ;
> -	struct timespec ts;
> -
> -	if (sleep_length < 0) {
> -		printk(KERN_WARNING "CMOS clock skew detected in timer resume!\n");
> -		/* The time after the resume must not be earlier than the time
> -		 * before the suspend or some nasty things will happen
> -		 */
> -		sleep_length = 0;
> -		ctime = sleep_start;
> -	}
>  #ifdef CONFIG_HPET_TIMER
>  	if (is_hpet_enabled())
>  		hpet_reenable();
>  #endif
>  	setup_pit_timer();
> -
> -	sec = ctime + clock_cmos_diff;
> -	ts.tv_sec = sec;
> -	ts.tv_nsec = 0;
> -	do_settimeofday(&ts);
> -	write_seqlock_irqsave(&xtime_lock, flags);
> -	jiffies_64 += sleep_length;
> -	write_sequnlock_irqrestore(&xtime_lock, flags);
>  	touch_softlockup_watchdog();
>  	return 0;
>  }

In this version of the patch, you no longer remove the
touch_softlockup_watchdog() call from timer_resume().

But clockevents-drivers-for-i386.patch deletes timer_resume()
altogether.

Hence we might need to put that re-added touch_softlockup_watchdog() call
into somewhere else now.
-
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