/*
 * linux/kernel/time/tick-oneshot.c
 *
 * This file contains functions which manage high resolution tick
 * related events.
 *
 * Copyright(C) 2005-2006, Thomas Gleixner <tglx@linutronix.de>
 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
 * Copyright(C) 2006-2007, Timesys Corp., Thomas Gleixner
 *
 * This code is licenced under the GPL version 2. For details see
 * kernel-base/COPYING.
 */
#include <linux/cpu.h>
#include <linux/err.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/percpu.h>
#include <linux/profile.h>
#include <linux/sched.h>

#include "tick-internal.h"

/**
 * tick_program_event
 */
int tick_program_event(ktime_t expires, int force)
{
	struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);

	if (unlikely(expires == KTIME_MAX)) {
		/*
		 * We don't need the clock event device any more, stop it.
		 */
		clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT_STOPPED);
		return 0;
	}

	if (unlikely(clockevent_state_oneshot_stopped(dev))) {
		/*
		 * We need the clock event again, configure it in ONESHOT mode
		 * before using it.
		 */
		clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT);
	}

	return clockevents_program_event(dev, expires, force);
}

/**
 * tick_resume_onshot - resume oneshot mode
 */
void tick_resume_oneshot(void)
{
	struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);

	clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT);
	clockevents_program_event(dev, ktime_get(), true);
}

/**
 * tick_setup_oneshot - setup the event device for oneshot mode (hres or nohz)
 */
void tick_setup_oneshot(struct clock_event_device *newdev,
			void (*handler)(struct clock_event_device *),
			ktime_t next_event)
{
	newdev->event_handler = handler;
	clockevents_switch_state(newdev, CLOCK_EVT_STATE_ONESHOT);
	clockevents_program_event(newdev, next_event, true);
}

/**
 * tick_switch_to_oneshot - switch to oneshot mode
 */
int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *))
{
	struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
	struct clock_event_device *dev = td->evtdev;

	if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) ||
		    !tick_device_is_functional(dev)) {

		printk(KERN_INFO "Clockevents: "
		       "could not switch to one-shot mode:");
		if (!dev) {
			printk(" no tick device\n");
		} else {
			if (!tick_device_is_functional(dev))
				printk(" %s is not functional.\n", dev->name);
			else
				printk(" %s does not support one-shot mode.\n",
				       dev->name);
		}
		return -EINVAL;
	}

	td->mode = TICKDEV_MODE_ONESHOT;
	dev->event_handler = handler;
	clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT);
	tick_broadcast_switch_to_oneshot();
	return 0;
}

/**
 * tick_check_oneshot_mode - check whether the system is in oneshot mode
 *
 * returns 1 when either nohz or highres are enabled. otherwise 0.
 */
int tick_oneshot_mode_active(void)
{
	unsigned long flags;
	int ret;

	local_irq_save(flags);
	ret = __this_cpu_read(tick_cpu_device.mode) == TICKDEV_MODE_ONESHOT;
	local_irq_restore(flags);

	return ret;
}

#ifdef CONFIG_HIGH_RES_TIMERS
/**
 * tick_init_highres - switch to high resolution mode
 *
 * Called with interrupts disabled.
 */
int tick_init_highres(void)
{
	return tick_switch_to_oneshot(hrtimer_interrupt);
}
#endif
t/commit/net/ipv4/xfrm4_state.c?h=nds-private-remove&amp;id=983779235a4d08f94e8cda073200423e0ff01d2e'>xfrm4_state.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='983779235a4d08f94e8cda073200423e0ff01d2e'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Venkat Reddy Talla &lt;vreddytalla@nvidia.com&gt;</td><td class='right'>2016-11-17 23:24:36 +0530</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-23 16:27:42 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/xfrm4_state.c?h=nds-private-remove&amp;id=983779235a4d08f94e8cda073200423e0ff01d2e'>983779235a4d08f94e8cda073200423e0ff01d2e</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ipv4/xfrm4_state.c?id=983779235a4d08f94e8cda073200423e0ff01d2e'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=983779235a4d08f94e8cda073200423e0ff01d2e'>254b624bd499c14b09d55abaf209ea95f3c860f7</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ipv4/xfrm4_state.c?h=nds-private-remove&amp;id=983779235a4d08f94e8cda073200423e0ff01d2e'>net/ipv4/xfrm4_state.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ipv4/xfrm4_state.c?h=nds-private-remove&amp;id=383d0fca7035a12f1201277d33e8fc87c9d60c9a'>383d0fca7035a12f1201277d33e8fc87c9d60c9a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ipv4/xfrm4_state.c?h=nds-private-remove&amp;id=983779235a4d08f94e8cda073200423e0ff01d2e&amp;id2=383d0fca7035a12f1201277d33e8fc87c9d60c9a'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: max77620: add documentation for MPOK property</div><div class='commit-msg'>Adding documentation for maxim,power-ok-control dts property

Signed-off-by: Venkat Reddy Talla &lt;vreddytalla@nvidia.com&gt;
Acked-by: Rob Herring &lt;robh@kernel.org&gt;
Acked-by: Lee Jones &lt;lee.jones@linaro.org&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=983779235a4d08f94e8cda073200423e0ff01d2e'>Diffstat</a> (limited to 'net/ipv4/xfrm4_state.c')</div><table summary='diffstat' class='diffstat'>