1 files changed, 673 insertions, 0 deletions

diff --git a/target/linux/goldfish/patches-2.6.30/0066-PM-Implement-wakelock-api.patch b/target/linux/goldfish/patches-2.6.30/0066-PM-Implement-wakelock-api.patch
new file mode 100644
index 000000000..610bc1f51
--- /dev/null
+++ b/target/linux/goldfish/patches-2.6.30/0066-PM-Implement-wakelock-api.patch
@@ -0,0 +1,673 @@
+From eef7f012d480142a3eccff91e0ae73ecb13220b3 Mon Sep 17 00:00:00 2001
+From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
+Date: Tue, 9 Sep 2008 22:14:34 -0700
+Subject: [PATCH 066/134] PM: Implement wakelock api.
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf-8
+Content-Transfer-Encoding: 8bit
+
+PM: wakelock: Replace expire work with a timer
+
+The expire work function did not work in the normal case.
+
+Signed-off-by: Arve Hjønnevåg <arve@android.com>
+---
+ kernel/power/Kconfig    |   19 ++
+ kernel/power/Makefile   |    1 +
+ kernel/power/power.h    |    7 +
+ kernel/power/wakelock.c |  598 +++++++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 625 insertions(+), 0 deletions(-)
+ create mode 100644 kernel/power/wakelock.c
+
+--- a/kernel/power/Kconfig
++++ b/kernel/power/Kconfig
+@@ -116,6 +116,25 @@ config SUSPEND_FREEZER
+ 
+ 	  Turning OFF this setting is NOT recommended! If in doubt, say Y.
+ 
++config HAS_WAKELOCK
++	bool
++
++config WAKELOCK
++	bool "Wake lock"
++	depends on PM && RTC_CLASS
++	default n
++	select HAS_WAKELOCK
++	---help---
++	  Enable wakelocks. When user space request a sleep state the
++	  sleep request will be delayed until no wake locks are held.
++
++config WAKELOCK_STAT
++	bool "Wake lock stats"
++	depends on WAKELOCK
++	default y
++	---help---
++	  Report wake lock stats in /proc/wakelocks
++
+ config HIBERNATION
+ 	bool "Hibernation (aka 'suspend to disk')"
+ 	depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE
+--- a/kernel/power/Makefile
++++ b/kernel/power/Makefile
+@@ -6,6 +6,7 @@ endif
+ obj-$(CONFIG_PM)		+= main.o
+ obj-$(CONFIG_PM_SLEEP)		+= console.o
+ obj-$(CONFIG_FREEZER)		+= process.o
++obj-$(CONFIG_WAKELOCK)		+= wakelock.o
+ obj-$(CONFIG_HIBERNATION)	+= swsusp.o disk.o snapshot.o swap.o user.o
+ 
+ obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o
+--- a/kernel/power/power.h
++++ b/kernel/power/power.h
+@@ -223,3 +223,10 @@ static inline void suspend_thaw_processe
+ {
+ }
+ #endif
++
++#ifdef CONFIG_WAKELOCK
++/* kernel/power/wakelock.c */
++extern struct workqueue_struct *suspend_work_queue;
++extern struct wake_lock main_wake_lock;
++extern suspend_state_t requested_suspend_state;
++#endif
+--- /dev/null
++++ b/kernel/power/wakelock.c
+@@ -0,0 +1,598 @@
++/* kernel/power/wakelock.c
++ *
++ * Copyright (C) 2005-2008 Google, Inc.
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ * GNU General Public License for more details.
++ *
++ */
++
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/rtc.h>
++#include <linux/suspend.h>
++#include <linux/syscalls.h> /* sys_sync */
++#include <linux/wakelock.h>
++#ifdef CONFIG_WAKELOCK_STAT
++#include <linux/proc_fs.h>
++#endif
++#include "power.h"
++
++enum {
++	DEBUG_EXIT_SUSPEND = 1U << 0,
++	DEBUG_WAKEUP = 1U << 1,
++	DEBUG_SUSPEND = 1U << 2,
++	DEBUG_EXPIRE = 1U << 3,
++	DEBUG_WAKE_LOCK = 1U << 4,
++};
++static int debug_mask = DEBUG_EXIT_SUSPEND | DEBUG_WAKEUP;
++module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
++
++#define WAKE_LOCK_TYPE_MASK              (0x0f)
++#define WAKE_LOCK_INITIALIZED            (1U << 8)
++#define WAKE_LOCK_ACTIVE                 (1U << 9)
++#define WAKE_LOCK_AUTO_EXPIRE            (1U << 10)
++#define WAKE_LOCK_PREVENTING_SUSPEND     (1U << 11)
++
++static DEFINE_SPINLOCK(list_lock);
++static LIST_HEAD(inactive_locks);
++static struct list_head active_wake_locks[WAKE_LOCK_TYPE_COUNT];
++static int current_event_num;
++struct workqueue_struct *suspend_work_queue;
++struct wake_lock main_wake_lock;
++suspend_state_t requested_suspend_state = PM_SUSPEND_MEM;
++static struct wake_lock unknown_wakeup;
++
++#ifdef CONFIG_WAKELOCK_STAT
++static struct wake_lock deleted_wake_locks;
++static ktime_t last_sleep_time_update;
++static int wait_for_wakeup;
++
++int get_expired_time(struct wake_lock *lock, ktime_t *expire_time)
++{
++	struct timespec ts;
++	struct timespec kt;
++	struct timespec tomono;
++	struct timespec delta;
++	unsigned long seq;
++	long timeout;
++
++	if (!(lock->flags & WAKE_LOCK_AUTO_EXPIRE))
++		return 0;
++	do {
++		seq = read_seqbegin(&xtime_lock);
++		timeout = lock->expires - jiffies;
++		if (timeout > 0)
++			return 0;
++		kt = current_kernel_time();
++		tomono = wall_to_monotonic;
++	} while (read_seqretry(&xtime_lock, seq));
++	jiffies_to_timespec(-timeout, &delta);
++	set_normalized_timespec(&ts, kt.tv_sec + tomono.tv_sec - delta.tv_sec,
++				kt.tv_nsec + tomono.tv_nsec - delta.tv_nsec);
++	*expire_time = timespec_to_ktime(ts);
++	return 1;
++}
++
++
++static int print_lock_stat(char *buf, struct wake_lock *lock)
++{
++	int lock_count = lock->stat.count;
++	int expire_count = lock->stat.expire_count;
++	ktime_t active_time = ktime_set(0, 0);
++	ktime_t total_time = lock->stat.total_time;
++	ktime_t max_time = lock->stat.max_time;
++	ktime_t prevent_suspend_time = lock->stat.prevent_suspend_time;
++	if (lock->flags & WAKE_LOCK_ACTIVE) {
++		ktime_t now, add_time;
++		int expired = get_expired_time(lock, &now);
++		if (!expired)
++			now = ktime_get();
++		add_time = ktime_sub(now, lock->stat.last_time);
++		lock_count++;
++		if (!expired)
++			active_time = add_time;
++		else
++			expire_count++;
++		total_time = ktime_add(total_time, add_time);
++		if (lock->flags & WAKE_LOCK_PREVENTING_SUSPEND)
++			prevent_suspend_time = ktime_add(prevent_suspend_time,
++					ktime_sub(now, last_sleep_time_update));
++		if (add_time.tv64 > max_time.tv64)
++			max_time = add_time;
++	}
++
++	return sprintf(buf, "\"%s\"\t%d\t%d\t%d\t%lld\t%lld\t%lld\t%lld\t"
++		       "%lld\n", lock->name, lock_count, expire_count,
++		       lock->stat.wakeup_count, ktime_to_ns(active_time),
++		       ktime_to_ns(total_time),
++		       ktime_to_ns(prevent_suspend_time), ktime_to_ns(max_time),
++		       ktime_to_ns(lock->stat.last_time));
++}
++
++
++static int wakelocks_read_proc(char *page, char **start, off_t off,
++			       int count, int *eof, void *data)
++{
++	unsigned long irqflags;
++	struct wake_lock *lock;
++	int len = 0;
++	char *p = page;
++	int type;
++
++	spin_lock_irqsave(&list_lock, irqflags);
++
++	p += sprintf(p, "name\tcount\texpire_count\twake_count\tactive_since"
++		     "\ttotal_time\tsleep_time\tmax_time\tlast_change\n");
++	list_for_each_entry(lock, &inactive_locks, link) {
++		p += print_lock_stat(p, lock);
++	}
++	for (type = 0; type < WAKE_LOCK_TYPE_COUNT; type++) {
++		list_for_each_entry(lock, &active_wake_locks[type], link)
++			p += print_lock_stat(p, lock);
++	}
++	spin_unlock_irqrestore(&list_lock, irqflags);
++
++	*start = page + off;
++
++	len = p - page;
++	if (len > off)
++		len -= off;
++	else
++		len = 0;
++
++	return len < count ? len  : count;
++}
++
++static void wake_unlock_stat_locked(struct wake_lock *lock, int expired)
++{
++	ktime_t duration;
++	ktime_t now;
++	if (!(lock->flags & WAKE_LOCK_ACTIVE))
++		return;
++	if (get_expired_time(lock, &now))
++		expired = 1;
++	else
++		now = ktime_get();
++	lock->stat.count++;
++	if (expired)
++		lock->stat.expire_count++;
++	duration = ktime_sub(now, lock->stat.last_time);
++	lock->stat.total_time = ktime_add(lock->stat.total_time, duration);
++	if (ktime_to_ns(duration) > ktime_to_ns(lock->stat.max_time))
++		lock->stat.max_time = duration;
++	lock->stat.last_time = ktime_get();
++	if (lock->flags & WAKE_LOCK_PREVENTING_SUSPEND) {
++		duration = ktime_sub(now, last_sleep_time_update);
++		lock->stat.prevent_suspend_time = ktime_add(
++			lock->stat.prevent_suspend_time, duration);
++		lock->flags &= ~WAKE_LOCK_PREVENTING_SUSPEND;
++	}
++}
++
++static void update_sleep_wait_stats_locked(int done)
++{
++	struct wake_lock *lock;
++	ktime_t now, etime, elapsed, add;
++	int expired;
++
++	now = ktime_get();
++	elapsed = ktime_sub(now, last_sleep_time_update);
++	list_for_each_entry(lock, &active_wake_locks[WAKE_LOCK_SUSPEND], link) {
++		expired = get_expired_time(lock, &etime);
++		if (lock->flags & WAKE_LOCK_PREVENTING_SUSPEND) {
++			if (expired)
++				add = ktime_sub(etime, last_sleep_time_update);
++			else
++				add = elapsed;
++			lock->stat.prevent_suspend_time = ktime_add(
++				lock->stat.prevent_suspend_time, add);
++		}
++		if (done || expired)
++			lock->flags &= ~WAKE_LOCK_PREVENTING_SUSPEND;
++		else
++			lock->flags |= WAKE_LOCK_PREVENTING_SUSPEND;
++	}
++	last_sleep_time_update = now;
++}
++#endif
++
++
++static void expire_wake_lock(struct wake_lock *lock)
++{
++#ifdef CONFIG_WAKELOCK_STAT
++	wake_unlock_stat_locked(lock, 1);
++#endif
++	lock->flags &= ~(WAKE_LOCK_ACTIVE | WAKE_LOCK_AUTO_EXPIRE);
++	list_del(&lock->link);
++	list_add(&lock->link, &inactive_locks);
++	if (debug_mask & (DEBUG_WAKE_LOCK | DEBUG_EXPIRE))
++		pr_info("expired wake lock %s\n", lock->name);
++}
++
++static void print_active_locks(int type)
++{
++	unsigned long irqflags;
++	struct wake_lock *lock;
++
++	BUG_ON(type >= WAKE_LOCK_TYPE_COUNT);
++	spin_lock_irqsave(&list_lock, irqflags);
++	list_for_each_entry(lock, &active_wake_locks[type], link) {
++		if (lock->flags & WAKE_LOCK_AUTO_EXPIRE) {
++			long timeout = lock->expires - jiffies;
++			if (timeout <= 0)
++				pr_info("wake lock %s, expired\n", lock->name);
++			else
++				pr_info("active wake lock %s, time left %ld\n",
++					lock->name, timeout);
++		} else
++			pr_info("active wake lock %s\n", lock->name);
++	}
++	spin_unlock_irqrestore(&list_lock, irqflags);
++}
++
++static long has_wake_lock_locked(int type)
++{
++	struct wake_lock *lock, *n;
++	long max_timeout = 0;
++
++	BUG_ON(type >= WAKE_LOCK_TYPE_COUNT);
++	list_for_each_entry_safe(lock, n, &active_wake_locks[type], link) {
++		if (lock->flags & WAKE_LOCK_AUTO_EXPIRE) {
++			long timeout = lock->expires - jiffies;
++			if (timeout <= 0)
++				expire_wake_lock(lock);
++			else if (timeout > max_timeout)
++				max_timeout = timeout;
++		} else
++			return -1;
++	}
++	return max_timeout;
++}
++
++long has_wake_lock(int type)
++{
++	long ret;
++	unsigned long irqflags;
++	spin_lock_irqsave(&list_lock, irqflags);
++	ret = has_wake_lock_locked(type);
++	spin_unlock_irqrestore(&list_lock, irqflags);
++	return ret;
++}
++
++static void suspend(struct work_struct *work)
++{
++	int ret;
++	int entry_event_num;
++
++	if (has_wake_lock(WAKE_LOCK_SUSPEND)) {
++		if (debug_mask & DEBUG_SUSPEND)
++			pr_info("suspend: abort suspend\n");
++		return;
++	}
++
++	entry_event_num = current_event_num;
++	sys_sync();
++	if (debug_mask & DEBUG_SUSPEND)
++		pr_info("suspend: enter suspend\n");
++	ret = pm_suspend(requested_suspend_state);
++	if (debug_mask & DEBUG_EXIT_SUSPEND) {
++		struct timespec ts;
++		struct rtc_time tm;
++		getnstimeofday(&ts);
++		rtc_time_to_tm(ts.tv_sec, &tm);
++		pr_info("suspend: exit suspend, ret = %d "
++			"(%d-%02d-%02d %02d:%02d:%02d.%09lu UTC)\n", ret,
++			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
++			tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec);
++	}
++	if (current_event_num == entry_event_num) {
++		if (debug_mask & DEBUG_SUSPEND)
++			pr_info("suspend: pm_suspend returned with no event\n");
++		wake_lock_timeout(&unknown_wakeup, HZ / 2);
++	}
++}
++static DECLARE_WORK(suspend_work, suspend);
++
++static void expire_wake_locks(unsigned long data)
++{
++	long has_lock;
++	unsigned long irqflags;
++	if (debug_mask & DEBUG_EXPIRE)
++		pr_info("expire_wake_locks: start\n");
++	if (debug_mask & DEBUG_SUSPEND)
++		print_active_locks(WAKE_LOCK_SUSPEND);
++	spin_lock_irqsave(&list_lock, irqflags);
++	has_lock = has_wake_lock_locked(WAKE_LOCK_SUSPEND);
++	if (debug_mask & DEBUG_EXPIRE)
++		pr_info("expire_wake_locks: done, has_lock %ld\n", has_lock);
++	if (has_lock == 0)
++		queue_work(suspend_work_queue, &suspend_work);
++	spin_unlock_irqrestore(&list_lock, irqflags);
++}
++static DEFINE_TIMER(expire_timer, expire_wake_locks, 0, 0);
++
++static int power_suspend_late(struct platform_device *pdev, pm_message_t state)
++{
++	int ret = has_wake_lock(WAKE_LOCK_SUSPEND) ? -EAGAIN : 0;
++#ifdef CONFIG_WAKELOCK_STAT
++	wait_for_wakeup = 1;
++#endif
++	if (debug_mask & DEBUG_SUSPEND)
++		pr_info("power_suspend_late return %d\n", ret);
++	return ret;
++}
++
++static struct platform_driver power_driver = {
++	.driver.name = "power",
++	.suspend_late = power_suspend_late,
++};
++static struct platform_device power_device = {
++	.name = "power",
++};
++
++void wake_lock_init(struct wake_lock *lock, int type, const char *name)
++{
++	unsigned long irqflags = 0;
++
++	if (name)
++		lock->name = name;
++	BUG_ON(!lock->name);
++
++	if (debug_mask & DEBUG_WAKE_LOCK)
++		pr_info("wake_lock_init name=%s\n", lock->name);
++#ifdef CONFIG_WAKELOCK_STAT
++	lock->stat.count = 0;
++	lock->stat.expire_count = 0;
++	lock->stat.wakeup_count = 0;
++	lock->stat.total_time = ktime_set(0, 0);
++	lock->stat.prevent_suspend_time = ktime_set(0, 0);
++	lock->stat.max_time = ktime_set(0, 0);
++	lock->stat.last_time = ktime_set(0, 0);
++#endif
++	lock->flags = (type & WAKE_LOCK_TYPE_MASK) | WAKE_LOCK_INITIALIZED;
++
++	INIT_LIST_HEAD(&lock->link);
++	spin_lock_irqsave(&list_lock, irqflags);
++	list_add(&lock->link, &inactive_locks);
++	spin_unlock_irqrestore(&list_lock, irqflags);
++}
++EXPORT_SYMBOL(wake_lock_init);
++
++void wake_lock_destroy(struct wake_lock *lock)
++{
++	unsigned long irqflags;
++	if (debug_mask & DEBUG_WAKE_LOCK)
++		pr_info("wake_lock_destroy name=%s\n", lock->name);
++	spin_lock_irqsave(&list_lock, irqflags);
++	lock->flags &= ~WAKE_LOCK_INITIALIZED;
++#ifdef CONFIG_WAKELOCK_STAT
++	if (lock->stat.count) {
++		deleted_wake_locks.stat.count += lock->stat.count;
++		deleted_wake_locks.stat.expire_count += lock->stat.expire_count;
++		deleted_wake_locks.stat.total_time =
++			ktime_add(deleted_wake_locks.stat.total_time,
++				  lock->stat.total_time);
++		deleted_wake_locks.stat.prevent_suspend_time =
++			ktime_add(deleted_wake_locks.stat.prevent_suspend_time,
++				  lock->stat.prevent_suspend_time);
++		deleted_wake_locks.stat.max_time =
++			ktime_add(deleted_wake_locks.stat.max_time,
++				  lock->stat.max_time);
++	}
++#endif
++	list_del(&lock->link);
++	spin_unlock_irqrestore(&list_lock, irqflags);
++}
++EXPORT_SYMBOL(wake_lock_destroy);
++
++static void wake_lock_internal(
++	struct wake_lock *lock, long timeout, int has_timeout)
++{
++	int type;
++	unsigned long irqflags;
++	long expire_in;
++
++	spin_lock_irqsave(&list_lock, irqflags);
++	type = lock->flags & WAKE_LOCK_TYPE_MASK;
++	BUG_ON(type >= WAKE_LOCK_TYPE_COUNT);
++	BUG_ON(!(lock->flags & WAKE_LOCK_INITIALIZED));
++#ifdef CONFIG_WAKELOCK_STAT
++	if (type == WAKE_LOCK_SUSPEND && wait_for_wakeup) {
++		if (debug_mask & DEBUG_WAKEUP)
++			pr_info("wakeup wake lock: %s\n", lock->name);
++		wait_for_wakeup = 0;
++		lock->stat.wakeup_count++;
++	}
++	if ((lock->flags & WAKE_LOCK_AUTO_EXPIRE) &&
++	    (long)(lock->expires - jiffies) <= 0) {
++		wake_unlock_stat_locked(lock, 0);
++		lock->stat.last_time = ktime_get();
++	}
++#endif
++	if (!(lock->flags & WAKE_LOCK_ACTIVE)) {
++		lock->flags |= WAKE_LOCK_ACTIVE;
++#ifdef CONFIG_WAKELOCK_STAT
++		lock->stat.last_time = ktime_get();
++#endif
++	}
++	list_del(&lock->link);
++	if (has_timeout) {
++		if (debug_mask & DEBUG_WAKE_LOCK)
++			pr_info("wake_lock: %s, type %d, timeout %ld.%03lu\n",
++				lock->name, type, timeout / HZ,
++				(timeout % HZ) * MSEC_PER_SEC / HZ);
++		lock->expires = jiffies + timeout;
++		lock->flags |= WAKE_LOCK_AUTO_EXPIRE;
++		list_add_tail(&lock->link, &active_wake_locks[type]);
++	} else {
++		if (debug_mask & DEBUG_WAKE_LOCK)
++			pr_info("wake_lock: %s, type %d\n", lock->name, type);
++		lock->expires = LONG_MAX;
++		lock->flags &= ~WAKE_LOCK_AUTO_EXPIRE;
++		list_add(&lock->link, &active_wake_locks[type]);
++	}
++	if (type == WAKE_LOCK_SUSPEND) {
++		current_event_num++;
++#ifdef CONFIG_WAKELOCK_STAT
++		if (lock == &main_wake_lock)
++			update_sleep_wait_stats_locked(1);
++		else if (!wake_lock_active(&main_wake_lock))
++			update_sleep_wait_stats_locked(0);
++#endif
++		if (has_timeout)
++			expire_in = has_wake_lock_locked(type);
++		else
++			expire_in = -1;
++		if (expire_in > 0) {
++			if (debug_mask & DEBUG_EXPIRE)
++				pr_info("wake_lock: %s, start expire timer, "
++					"%ld\n", lock->name, expire_in);
++			mod_timer(&expire_timer, jiffies + expire_in);
++		} else {
++			if (del_timer(&expire_timer))
++				if (debug_mask & DEBUG_EXPIRE)
++					pr_info("wake_lock: %s, stop expire timer\n",
++						lock->name);
++			if (expire_in == 0)
++				queue_work(suspend_work_queue, &suspend_work);
++		}
++	}
++	spin_unlock_irqrestore(&list_lock, irqflags);
++}
++
++void wake_lock(struct wake_lock *lock)
++{
++	wake_lock_internal(lock, 0, 0);
++}
++EXPORT_SYMBOL(wake_lock);
++
++void wake_lock_timeout(struct wake_lock *lock, long timeout)
++{
++	wake_lock_internal(lock, timeout, 1);
++}
++EXPORT_SYMBOL(wake_lock_timeout);
++
++void wake_unlock(struct wake_lock *lock)
++{
++	int type;
++	unsigned long irqflags;
++	spin_lock_irqsave(&list_lock, irqflags);
++	type = lock->flags & WAKE_LOCK_TYPE_MASK;
++#ifdef CONFIG_WAKELOCK_STAT
++	wake_unlock_stat_locked(lock, 0);
++#endif
++	if (debug_mask & DEBUG_WAKE_LOCK)
++		pr_info("wake_unlock: %s\n", lock->name);
++	lock->flags &= ~(WAKE_LOCK_ACTIVE | WAKE_LOCK_AUTO_EXPIRE);
++	list_del(&lock->link);
++	list_add(&lock->link, &inactive_locks);
++	if (type == WAKE_LOCK_SUSPEND) {
++		long has_lock = has_wake_lock_locked(type);
++		if (has_lock > 0) {
++			if (debug_mask & DEBUG_EXPIRE)
++				pr_info("wake_unlock: %s, start expire timer, "
++					"%ld\n", lock->name, has_lock);
++			mod_timer(&expire_timer, jiffies + has_lock);
++		} else {
++			if (del_timer(&expire_timer))
++				if (debug_mask & DEBUG_EXPIRE)
++					pr_info("wake_unlock: %s, stop expire "
++						"timer\n", lock->name);
++			if (has_lock == 0)
++				queue_work(suspend_work_queue, &suspend_work);
++		}
++		if (lock == &main_wake_lock) {
++			if (debug_mask & DEBUG_SUSPEND)
++				print_active_locks(WAKE_LOCK_SUSPEND);
++#ifdef CONFIG_WAKELOCK_STAT
++			update_sleep_wait_stats_locked(0);
++#endif
++		}
++	}
++	spin_unlock_irqrestore(&list_lock, irqflags);
++}
++EXPORT_SYMBOL(wake_unlock);
++
++int wake_lock_active(struct wake_lock *lock)
++{
++	return !!(lock->flags & WAKE_LOCK_ACTIVE);
++}
++EXPORT_SYMBOL(wake_lock_active);
++
++static int __init wakelocks_init(void)
++{
++	int ret;
++	int i;
++
++	for (i = 0; i < ARRAY_SIZE(active_wake_locks); i++)
++		INIT_LIST_HEAD(&active_wake_locks[i]);
++
++#ifdef CONFIG_WAKELOCK_STAT
++	wake_lock_init(&deleted_wake_locks, WAKE_LOCK_SUSPEND,
++			"deleted_wake_locks");
++#endif
++	wake_lock_init(&main_wake_lock, WAKE_LOCK_SUSPEND, "main");
++	wake_lock(&main_wake_lock);
++	wake_lock_init(&unknown_wakeup, WAKE_LOCK_SUSPEND, "unknown_wakeups");
++
++	ret = platform_device_register(&power_device);
++	if (ret) {
++		pr_err("wakelocks_init: platform_device_register failed\n");
++		goto err_platform_device_register;
++	}
++	ret = platform_driver_register(&power_driver);
++	if (ret) {
++		pr_err("wakelocks_init: platform_driver_register failed\n");
++		goto err_platform_driver_register;
++	}
++
++	suspend_work_queue = create_singlethread_workqueue("suspend");
++	if (suspend_work_queue == NULL) {
++		ret = -ENOMEM;
++		goto err_suspend_work_queue;
++	}
++
++#ifdef CONFIG_WAKELOCK_STAT
++	create_proc_read_entry("wakelocks", S_IRUGO, NULL,
++				wakelocks_read_proc, NULL);
++#endif
++
++	return 0;
++
++err_suspend_work_queue:
++	platform_driver_unregister(&power_driver);
++err_platform_driver_register:
++	platform_device_unregister(&power_device);
++err_platform_device_register:
++	wake_lock_destroy(&unknown_wakeup);
++	wake_lock_destroy(&main_wake_lock);
++#ifdef CONFIG_WAKELOCK_STAT
++	wake_lock_destroy(&deleted_wake_locks);
++#endif
++	return ret;
++}
++
++static void  __exit wakelocks_exit(void)
++{
++#ifdef CONFIG_WAKELOCK_STAT
++	remove_proc_entry("wakelocks", NULL);
++#endif
++	destroy_workqueue(suspend_work_queue);
++	platform_driver_unregister(&power_driver);
++	platform_device_unregister(&power_device);
++	wake_lock_destroy(&unknown_wakeup);
++	wake_lock_destroy(&main_wake_lock);
++#ifdef CONFIG_WAKELOCK_STAT
++	wake_lock_destroy(&deleted_wake_locks);
++#endif
++}
++
++core_initcall(wakelocks_init);
++module_exit(wakelocks_exit);