watchdog: Fix code/comments mismatches

 *

 * started by Don Zickus, Copyright (C) 2010 Red Hat, Inc.

 *

 * this code detects hard lockups: incidents in where on a CPU

 * the kernel does not respond to anything except NMI.

 *

 * Note: Most of this code is borrowed heavily from softlockup.c,

 * so thanks to Ingo for the initial implementation.

 * Some chunks also taken from arch/x86/kernel/apic/nmi.c, thanks

 * Note: Most of this code is borrowed heavily from the original softlockup

 * detector, so thanks to Ingo for the initial implementation.

 * Some chunks also taken from the old x86-specific nmi watchdog code, thanks

 * to those contributors as well.

 */

{

	/*

	 * convert watchdog_thresh from seconds to ns

	 * the divide by 5 is to give hrtimer 5 chances to

	 * increment before the hardlockup detector generates

	 * a warning

	 * the divide by 5 is to give hrtimer several chances (two

	 * or three with the current relation between the soft

	 * and hard thresholds) to increment before the

	 * hardlockup detector generates a warning

	 */

	return get_softlockup_thresh() * (NSEC_PER_SEC / 5);

}

	set_current_state(TASK_INTERRUPTIBLE);

	/*

	 * Run briefly once per second to reset the softlockup timestamp.

	 * If this gets delayed for more than 60 seconds then the

	 * debug-printout triggers in watchdog_timer_fn().

	 * Run briefly (kicked by the hrtimer callback function) once every

	 * get_sample_period() seconds (4 seconds by default) to reset the

	 * softlockup timestamp. If this gets delayed for more than

	 * 2*watchdog_thresh seconds then the debug-printout triggers in

	 * watchdog_timer_fn().

	 */

	while (!kthread_should_stop()) {

		__touch_watchdog();