clockevents.c revision de68d9b173ee657115dd0e584c2365b7954253a5
1d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* 2d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * linux/kernel/time/clockevents.c 3d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 4d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * This file contains functions which manage clock event devices. 5d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 6d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Copyright(C) 2005-2006, Thomas Gleixner <tglx@linutronix.de> 7d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar 8d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Copyright(C) 2006-2007, Timesys Corp., Thomas Gleixner 9d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 10d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * This code is licenced under the GPL version 2. For details see 11d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * kernel-base/COPYING. 12d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 13d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 14d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/clockchips.h> 15d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/hrtimer.h> 16d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/init.h> 17d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/module.h> 18d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/notifier.h> 19d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/smp.h> 20d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner#include <linux/sysdev.h> 21d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 22d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* The registered clock event devices */ 23d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic LIST_HEAD(clockevent_devices); 24d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic LIST_HEAD(clockevents_released); 25d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 26d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* Notification for clock events */ 27d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic RAW_NOTIFIER_HEAD(clockevents_chain); 28d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 29d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* Protection for the above */ 30d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic DEFINE_SPINLOCK(clockevents_lock); 31d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 32d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 33d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_delta2ns - Convert a latch value (device ticks) to nanoseconds 34d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @latch: value to convert 35d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @evt: pointer to clock event device descriptor 36d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 37d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Math helper, returns latch value converted to nanoseconds (bound checked) 38d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 39d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerunsigned long clockevent_delta2ns(unsigned long latch, 40d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner struct clock_event_device *evt) 41d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 42d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner u64 clc = ((u64) latch << evt->shift); 43d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 44d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner do_div(clc, evt->mult); 45d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (clc < 1000) 46d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clc = 1000; 47d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (clc > LONG_MAX) 48d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clc = LONG_MAX; 49d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 50d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner return (unsigned long) clc; 51d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 52d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 53d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 54d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_set_mode - set the operating mode of a clock event device 55d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @dev: device to modify 56d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @mode: new mode 57d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 58d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Must be called with interrupts disabled ! 59d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 60d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnervoid clockevents_set_mode(struct clock_event_device *dev, 61d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner enum clock_event_mode mode) 62d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 63d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (dev->mode != mode) { 64d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner dev->set_mode(mode, dev); 65d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner dev->mode = mode; 66d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner } 67d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 68d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 69d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 70d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_program_event - Reprogram the clock event device. 71d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @expires: absolute expiry time (monotonic clock) 72d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 73d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Returns 0 on success, -ETIME when the event is in the past. 74d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 75d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerint clockevents_program_event(struct clock_event_device *dev, ktime_t expires, 76d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner ktime_t now) 77d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 78d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner unsigned long long clc; 79d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner int64_t delta; 80d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 81d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner delta = ktime_to_ns(ktime_sub(expires, now)); 82d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 83d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (delta <= 0) 84d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner return -ETIME; 85d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 86d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner dev->next_event = expires; 87d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 88d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (dev->mode == CLOCK_EVT_MODE_SHUTDOWN) 89d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner return 0; 90d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 91d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (delta > dev->max_delta_ns) 92d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner delta = dev->max_delta_ns; 93d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (delta < dev->min_delta_ns) 94d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner delta = dev->min_delta_ns; 95d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 96d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clc = delta * dev->mult; 97d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clc >>= dev->shift; 98d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 99d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner return dev->set_next_event((unsigned long) clc, dev); 100d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 101d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 102d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 103d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_register_notifier - register a clock events change listener 104d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 105d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerint clockevents_register_notifier(struct notifier_block *nb) 106d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 107d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner int ret; 108d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 109d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner spin_lock(&clockevents_lock); 110d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner ret = raw_notifier_chain_register(&clockevents_chain, nb); 111d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner spin_unlock(&clockevents_lock); 112d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 113d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner return ret; 114d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 115d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 116d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* 117d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Notify about a clock event change. Called with clockevents_lock 118d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * held. 119d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 120d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic void clockevents_do_notify(unsigned long reason, void *dev) 121d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 122d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner raw_notifier_call_chain(&clockevents_chain, reason, dev); 123d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 124d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 125d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* 126d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Called after a notify add to make devices availble which were 127d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * released from the notifier call. 128d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 129d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic void clockevents_notify_released(void) 130d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 131d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner struct clock_event_device *dev; 132d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 133d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner while (!list_empty(&clockevents_released)) { 134d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner dev = list_entry(clockevents_released.next, 135d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner struct clock_event_device, list); 136d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner list_del(&dev->list); 137d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner list_add(&dev->list, &clockevent_devices); 138d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clockevents_do_notify(CLOCK_EVT_NOTIFY_ADD, dev); 139d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner } 140d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 141d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 142d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 143d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_register_device - register a clock event device 144d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @dev: device to register 145d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 146d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnervoid clockevents_register_device(struct clock_event_device *dev) 147d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 148d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED); 149d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 150d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner spin_lock(&clockevents_lock); 151d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 152d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner list_add(&dev->list, &clockevent_devices); 153d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clockevents_do_notify(CLOCK_EVT_NOTIFY_ADD, dev); 154d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clockevents_notify_released(); 155d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 156d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner spin_unlock(&clockevents_lock); 157d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 158d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 159d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/* 160d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Noop handler when we shut down an event device 161d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 162d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnerstatic void clockevents_handle_noop(struct clock_event_device *dev) 163d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 164d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 165d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 166d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 167d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_exchange_device - release and request clock devices 168d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @old: device to release (can be NULL) 169d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * @new: device to request (can be NULL) 170d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * 171d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Called from the notifier chain. clockevents_lock is held already 172d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 173d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnervoid clockevents_exchange_device(struct clock_event_device *old, 174d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner struct clock_event_device *new) 175d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 176d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner unsigned long flags; 177d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 178d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner local_irq_save(flags); 179d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner /* 180d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Caller releases a clock event device. We queue it into the 181d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * released list and do a notify add later. 182d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 183d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (old) { 184d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner old->event_handler = clockevents_handle_noop; 185d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clockevents_set_mode(old, CLOCK_EVT_MODE_UNUSED); 186d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner list_del(&old->list); 187d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner list_add(&old->list, &clockevents_released); 188d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner } 189d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 190d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner if (new) { 191d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner BUG_ON(new->mode != CLOCK_EVT_MODE_UNUSED); 192d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clockevents_set_mode(new, CLOCK_EVT_MODE_SHUTDOWN); 193d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner } 194d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner local_irq_restore(flags); 195d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 196d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 197de68d9b173ee657115dd0e584c2365b7954253a5Thomas Gleixner#ifdef CONFIG_GENERIC_CLOCKEVENTS 198d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner/** 199d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * clockevents_notify - notification about relevant events 200d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 201d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixnervoid clockevents_notify(unsigned long reason, void *arg) 202d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner{ 203d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner spin_lock(&clockevents_lock); 204d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner clockevents_do_notify(reason, arg); 205d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 206d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner switch (reason) { 207d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner case CLOCK_EVT_NOTIFY_CPU_DEAD: 208d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner /* 209d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * Unregister the clock event devices which were 210d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner * released from the users in the notify chain. 211d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner */ 212d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner while (!list_empty(&clockevents_released)) { 213d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner struct clock_event_device *dev; 214d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner 215d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner dev = list_entry(clockevents_released.next, 216d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner struct clock_event_device, list); 217d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner list_del(&dev->list); 218d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner } 219d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner break; 220d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner default: 221d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner break; 222d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner } 223d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner spin_unlock(&clockevents_lock); 224d316c57ff6bfad9557462b9100f25c6260d2b774Thomas Gleixner} 225d316c57ff6bfad9557462b9100f25c6260d2b774Thomas GleixnerEXPORT_SYMBOL_GPL(clockevents_notify); 226de68d9b173ee657115dd0e584c2365b7954253a5Thomas Gleixner#endif 227