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-rw-r--r--target/linux/goldfish/patches-2.6.30/0066-PM-Implement-wakelock-api.patch673
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 0000000000..610bc1f518
--- /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);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 14:42:30 +0000