+++ /dev/null
-/* drivers/rtc/alarm.c
- *
- * Copyright (C) 2007 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 <asm/mach/time.h>
-#include <linux/android_alarm.h>
-#include <linux/device.h>
-#include <linux/miscdevice.h>
-#include <linux/platform_device.h>
-#include <linux/rtc.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/sysdev.h>
-#include <linux/wakelock.h>
-
-#define ANDROID_ALARM_PRINT_ERRORS (1U << 0)
-#define ANDROID_ALARM_PRINT_INIT_STATUS (1U << 1)
-#define ANDROID_ALARM_PRINT_INFO (1U << 2)
-#define ANDROID_ALARM_PRINT_IO (1U << 3)
-#define ANDROID_ALARM_PRINT_INT (1U << 4)
-#define ANDROID_ALARM_PRINT_FLOW (1U << 5)
-
-#if 0
-#define ANDROID_ALARM_DPRINTF_MASK (~0)
-#define ANDROID_ALARM_DPRINTF(debug_level_mask, args...) \
- do { \
- if (ANDROID_ALARM_DPRINTF_MASK & debug_level_mask) { \
- printk(args); \
- } \
- } while (0)
-#else
-#define ANDROID_ALARM_DPRINTF(args...)
-#endif
-
-#define ANDROID_ALARM_WAKEUP_MASK ( \
- ANDROID_ALARM_RTC_WAKEUP_MASK | \
- ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
-
-/* support old usespace code */
-#define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) /* set alarm */
-#define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t)
-
-static struct rtc_device *alarm_rtc_dev;
-static int alarm_opened;
-static DEFINE_SPINLOCK(alarm_slock);
-static DEFINE_MUTEX(alarm_setrtc_mutex);
-static struct wake_lock alarm_wake_lock;
-static struct wake_lock alarm_rtc_wake_lock;
-static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue);
-static uint32_t alarm_pending;
-static uint32_t alarm_enabled;
-static uint32_t wait_pending;
-static struct platform_device *alarm_platform_dev;
-static struct hrtimer alarm_timer[ANDROID_ALARM_TYPE_COUNT];
-static struct timespec alarm_time[ANDROID_ALARM_TYPE_COUNT];
-static struct timespec elapsed_rtc_delta;
-
-static void alarm_start_hrtimer(enum android_alarm_type alarm_type)
-{
- struct timespec hr_alarm_time;
- if (!(alarm_enabled & (1U << alarm_type)))
- return;
- hr_alarm_time = alarm_time[alarm_type];
- if (alarm_type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP ||
- alarm_type == ANDROID_ALARM_ELAPSED_REALTIME)
- set_normalized_timespec(&hr_alarm_time,
- hr_alarm_time.tv_sec + elapsed_rtc_delta.tv_sec,
- hr_alarm_time.tv_nsec + elapsed_rtc_delta.tv_nsec);
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW,
- "alarm start hrtimer %d at %ld.%09ld\n",
- alarm_type, hr_alarm_time.tv_sec, hr_alarm_time.tv_nsec);
- hrtimer_start(&alarm_timer[alarm_type],
- timespec_to_ktime(hr_alarm_time), HRTIMER_MODE_ABS);
-}
-
-static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
- int rv = 0;
- unsigned long flags;
- int i;
- struct timespec new_alarm_time;
- struct timespec new_rtc_time;
- struct timespec tmp_time;
- struct rtc_time rtc_new_rtc_time;
- enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd);
- uint32_t alarm_type_mask = 1U << alarm_type;
-
- if (alarm_type >= ANDROID_ALARM_TYPE_COUNT)
- return -EINVAL;
-
- if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_TIME(0)) {
- if ((file->f_flags & O_ACCMODE) == O_RDONLY)
- return -EPERM;
- if (file->private_data == NULL &&
- cmd != ANDROID_ALARM_SET_RTC) {
- spin_lock_irqsave(&alarm_slock, flags);
- if (alarm_opened) {
- spin_unlock_irqrestore(&alarm_slock, flags);
- return -EBUSY;
- }
- alarm_opened = 1;
- file->private_data = (void *)1;
- spin_unlock_irqrestore(&alarm_slock, flags);
- }
- }
-
- switch (ANDROID_ALARM_BASE_CMD(cmd)) {
- case ANDROID_ALARM_CLEAR(0):
- spin_lock_irqsave(&alarm_slock, flags);
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO,
- "alarm %d clear\n", alarm_type);
- hrtimer_try_to_cancel(&alarm_timer[alarm_type]);
- if (alarm_pending) {
- alarm_pending &= ~alarm_type_mask;
- if (!alarm_pending && !wait_pending)
- wake_unlock(&alarm_wake_lock);
- }
- alarm_enabled &= ~alarm_type_mask;
- spin_unlock_irqrestore(&alarm_slock, flags);
- break;
-
- case ANDROID_ALARM_SET_OLD:
- case ANDROID_ALARM_SET_AND_WAIT_OLD:
- if (get_user(new_alarm_time.tv_sec, (int __user *)arg)) {
- rv = -EFAULT;
- goto err1;
- }
- new_alarm_time.tv_nsec = 0;
- goto from_old_alarm_set;
-
- case ANDROID_ALARM_SET_AND_WAIT(0):
- case ANDROID_ALARM_SET(0):
- if (copy_from_user(&new_alarm_time, (void __user *)arg,
- sizeof(new_alarm_time))) {
- rv = -EFAULT;
- goto err1;
- }
-from_old_alarm_set:
- spin_lock_irqsave(&alarm_slock, flags);
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO,
- "alarm %d set %ld.%09ld\n", alarm_type,
- new_alarm_time.tv_sec, new_alarm_time.tv_nsec);
- alarm_time[alarm_type] = new_alarm_time;
- alarm_enabled |= alarm_type_mask;
- alarm_start_hrtimer(alarm_type);
- spin_unlock_irqrestore(&alarm_slock, flags);
- if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0)
- && cmd != ANDROID_ALARM_SET_AND_WAIT_OLD)
- break;
- /* fall though */
- case ANDROID_ALARM_WAIT:
- spin_lock_irqsave(&alarm_slock, flags);
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO, "alarm wait\n");
- if (!alarm_pending && wait_pending) {
- wake_unlock(&alarm_wake_lock);
- wait_pending = 0;
- }
- spin_unlock_irqrestore(&alarm_slock, flags);
- rv = wait_event_interruptible(alarm_wait_queue, alarm_pending);
- if (rv)
- goto err1;
- spin_lock_irqsave(&alarm_slock, flags);
- rv = alarm_pending;
- wait_pending = 1;
- alarm_pending = 0;
- if (rv & ANDROID_ALARM_WAKEUP_MASK)
- wake_unlock(&alarm_rtc_wake_lock);
- spin_unlock_irqrestore(&alarm_slock, flags);
- break;
- case ANDROID_ALARM_SET_RTC:
- if (copy_from_user(&new_rtc_time, (void __user *)arg,
- sizeof(new_rtc_time))) {
- rv = -EFAULT;
- goto err1;
- }
- rtc_time_to_tm(new_rtc_time.tv_sec, &rtc_new_rtc_time);
-
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO,
- "set rtc %ld %ld - rtc %02d:%02d:%02d %02d/%02d/%04d\n",
- new_rtc_time.tv_sec, new_rtc_time.tv_nsec,
- rtc_new_rtc_time.tm_hour, rtc_new_rtc_time.tm_min,
- rtc_new_rtc_time.tm_sec, rtc_new_rtc_time.tm_mon + 1,
- rtc_new_rtc_time.tm_mday,
- rtc_new_rtc_time.tm_year + 1900);
-
- mutex_lock(&alarm_setrtc_mutex);
- spin_lock_irqsave(&alarm_slock, flags);
- for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++)
- hrtimer_try_to_cancel(&alarm_timer[i]);
- getnstimeofday(&tmp_time);
- elapsed_rtc_delta = timespec_sub(elapsed_rtc_delta,
- timespec_sub(tmp_time, new_rtc_time));
- spin_unlock_irqrestore(&alarm_slock, flags);
- rv = do_settimeofday(&new_rtc_time);
- spin_lock_irqsave(&alarm_slock, flags);
- for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++)
- alarm_start_hrtimer(i);
- spin_unlock_irqrestore(&alarm_slock, flags);
- if (rv < 0) {
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_ERRORS,
- "Failed to set time\n");
- mutex_unlock(&alarm_setrtc_mutex);
- goto err1;
- }
- rv = rtc_set_time(alarm_rtc_dev, &rtc_new_rtc_time);
- spin_lock_irqsave(&alarm_slock, flags);
- alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK;
- wake_up(&alarm_wait_queue);
- spin_unlock_irqrestore(&alarm_slock, flags);
- mutex_unlock(&alarm_setrtc_mutex);
- if (rv < 0) {
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_ERRORS,
- "Failed to set RTC, time will be lost on reboot\n");
- goto err1;
- }
- break;
- case ANDROID_ALARM_GET_TIME(0):
- mutex_lock(&alarm_setrtc_mutex);
- spin_lock_irqsave(&alarm_slock, flags);
- if (alarm_type != ANDROID_ALARM_SYSTEMTIME) {
- getnstimeofday(&tmp_time);
- if (alarm_type >= ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP)
- tmp_time = timespec_sub(tmp_time,
- elapsed_rtc_delta);
- } else
- ktime_get_ts(&tmp_time);
- spin_unlock_irqrestore(&alarm_slock, flags);
- mutex_unlock(&alarm_setrtc_mutex);
- if (copy_to_user((void __user *)arg, &tmp_time,
- sizeof(tmp_time))) {
- rv = -EFAULT;
- goto err1;
- }
- break;
-
- default:
- rv = -EINVAL;
- goto err1;
- }
-err1:
- return rv;
-}
-
-static int alarm_open(struct inode *inode, struct file *file)
-{
- file->private_data = NULL;
- return 0;
-}
-
-static int alarm_release(struct inode *inode, struct file *file)
-{
- int i;
- unsigned long flags;
-
- spin_lock_irqsave(&alarm_slock, flags);
- if (file->private_data != 0) {
- for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) {
- uint32_t alarm_type_mask = 1U << i;
- if (alarm_enabled & alarm_type_mask) {
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
- "alarm_release: clear alarm, "
- "pending %d\n",
- !!(alarm_pending & alarm_type_mask));
- alarm_enabled &= ~alarm_type_mask;
- }
- spin_unlock_irqrestore(&alarm_slock, flags);
- hrtimer_cancel(&alarm_timer[i]);
- spin_lock_irqsave(&alarm_slock, flags);
- }
- if (alarm_pending | wait_pending) {
- if (alarm_pending)
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
- "alarm_release: clear pending alarms "
- "%x\n", alarm_pending);
- wake_unlock(&alarm_wake_lock);
- wait_pending = 0;
- alarm_pending = 0;
- }
- alarm_opened = 0;
- }
- spin_unlock_irqrestore(&alarm_slock, flags);
- return 0;
-}
-
-static enum hrtimer_restart alarm_timer_triggered(struct hrtimer *timer)
-{
- unsigned long flags;
- enum android_alarm_type alarm_type = (timer - alarm_timer);
- uint32_t alarm_type_mask = 1U << alarm_type;
-
-
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INT,
- "alarm_timer_triggered type %d\n", alarm_type);
- spin_lock_irqsave(&alarm_slock, flags);
- if (alarm_enabled & alarm_type_mask) {
- wake_lock_timeout(&alarm_wake_lock, 5 * HZ);
- alarm_enabled &= ~alarm_type_mask;
- alarm_pending |= alarm_type_mask;
- wake_up(&alarm_wait_queue);
- }
- spin_unlock_irqrestore(&alarm_slock, flags);
- return HRTIMER_NORESTART;
-}
-
-static void alarm_triggered_func(void *p)
-{
- struct rtc_device *rtc = alarm_rtc_dev;
- if (!(rtc->irq_data & RTC_AF))
- return;
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INT, "rtc alarm triggered\n");
- wake_lock_timeout(&alarm_rtc_wake_lock, 1 * HZ);
-}
-
-int alarm_suspend(struct platform_device *pdev, pm_message_t state)
-{
- int err = 0;
- unsigned long flags;
- struct rtc_wkalrm rtc_alarm;
- struct rtc_time rtc_current_rtc_time;
- unsigned long rtc_current_time;
- unsigned long rtc_alarm_time;
- struct timespec rtc_current_timespec;
- struct timespec rtc_delta;
- struct timespec elapsed_realtime_alarm_time;
-
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW,
- "alarm_suspend(%p, %d)\n", pdev, state.event);
- spin_lock_irqsave(&alarm_slock, flags);
- if (alarm_pending && !wake_lock_active(&alarm_wake_lock)) {
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
- "alarm pending\n");
- err = -EBUSY;
- goto err1;
- }
- if (alarm_enabled & ANDROID_ALARM_WAKEUP_MASK) {
- spin_unlock_irqrestore(&alarm_slock, flags);
- if (alarm_enabled & ANDROID_ALARM_RTC_WAKEUP_MASK)
- hrtimer_cancel(&alarm_timer[ANDROID_ALARM_RTC_WAKEUP]);
- if (alarm_enabled & ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
- hrtimer_cancel(&alarm_timer[
- ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]);
-
- rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time);
- rtc_current_timespec.tv_nsec = 0;
- rtc_tm_to_time(&rtc_current_rtc_time,
- &rtc_current_timespec.tv_sec);
- save_time_delta(&rtc_delta, &rtc_current_timespec);
- set_normalized_timespec(&elapsed_realtime_alarm_time,
- alarm_time[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]
- .tv_sec + elapsed_rtc_delta.tv_sec,
- alarm_time[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]
- .tv_nsec + elapsed_rtc_delta.tv_nsec);
- if ((alarm_enabled & ANDROID_ALARM_RTC_WAKEUP_MASK) &&
- (!(alarm_enabled &
- ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) ||
- timespec_compare(&alarm_time[ANDROID_ALARM_RTC_WAKEUP],
- &elapsed_realtime_alarm_time) < 0))
- rtc_alarm_time = timespec_sub(
- alarm_time[ANDROID_ALARM_RTC_WAKEUP],
- rtc_delta).tv_sec;
- else
- rtc_alarm_time = timespec_sub(
- elapsed_realtime_alarm_time, rtc_delta).tv_sec;
- rtc_time_to_tm(rtc_alarm_time, &rtc_alarm.time);
- rtc_alarm.enabled = 1;
- rtc_set_alarm(alarm_rtc_dev, &rtc_alarm);
- rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time);
- rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time);
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
- "rtc alarm set at %ld, now %ld, rtc delta %ld.%09ld\n",
- rtc_alarm_time, rtc_current_time,
- rtc_delta.tv_sec, rtc_delta.tv_nsec);
- if (rtc_current_time + 1 >= rtc_alarm_time) {
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
- "alarm about to go off\n");
- memset(&rtc_alarm, 0, sizeof(rtc_alarm));
- rtc_alarm.enabled = 0;
- rtc_set_alarm(alarm_rtc_dev, &rtc_alarm);
-
- spin_lock_irqsave(&alarm_slock, flags);
- wake_lock_timeout(&alarm_rtc_wake_lock, 2 * HZ);
- alarm_start_hrtimer(ANDROID_ALARM_RTC_WAKEUP);
- alarm_start_hrtimer(
- ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP);
- err = -EBUSY;
- spin_unlock_irqrestore(&alarm_slock, flags);
- }
- } else {
-err1:
- spin_unlock_irqrestore(&alarm_slock, flags);
- }
- return err;
-}
-
-int alarm_resume(struct platform_device *pdev)
-{
- struct rtc_wkalrm alarm;
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW,
- "alarm_resume(%p)\n", pdev);
- if (alarm_enabled & ANDROID_ALARM_WAKEUP_MASK) {
- memset(&alarm, 0, sizeof(alarm));
- alarm.enabled = 0;
- rtc_set_alarm(alarm_rtc_dev, &alarm);
- alarm_start_hrtimer(ANDROID_ALARM_RTC_WAKEUP);
- alarm_start_hrtimer(ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP);
- }
- return 0;
-}
-
-static struct rtc_task alarm_rtc_task = {
- .func = alarm_triggered_func
-};
-
-static struct file_operations alarm_fops = {
- .owner = THIS_MODULE,
- .unlocked_ioctl = alarm_ioctl,
- .open = alarm_open,
- .release = alarm_release,
-};
-
-static struct miscdevice alarm_device = {
- .minor = MISC_DYNAMIC_MINOR,
- .name = "alarm",
- .fops = &alarm_fops,
-};
-
-static int rtc_alarm_add_device(struct device *dev,
- struct class_interface *class_intf)
-{
- int err;
- struct rtc_device *rtc = to_rtc_device(dev);
-
- mutex_lock(&alarm_setrtc_mutex);
-
- if (alarm_rtc_dev) {
- err = -EBUSY;
- goto err1;
- }
-
- err = misc_register(&alarm_device);
- if (err)
- goto err1;
- alarm_platform_dev =
- platform_device_register_simple("alarm", -1, NULL, 0);
- if (IS_ERR(alarm_platform_dev)) {
- err = PTR_ERR(alarm_platform_dev);
- goto err2;
- }
- err = rtc_irq_register(rtc, &alarm_rtc_task);
- if (err)
- goto err3;
- alarm_rtc_dev = rtc;
- mutex_unlock(&alarm_setrtc_mutex);
-
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm: parent %p\n",
- alarm_platform_dev->dev.power.pm_parent);
- return 0;
-
-err3:
- platform_device_unregister(alarm_platform_dev);
-err2:
- misc_deregister(&alarm_device);
-err1:
- mutex_unlock(&alarm_setrtc_mutex);
- return err;
-}
-
-static void rtc_alarm_remove_device(struct device *dev,
- struct class_interface *class_intf)
-{
- if (dev == &alarm_rtc_dev->dev) {
- rtc_irq_unregister(alarm_rtc_dev, &alarm_rtc_task);
- platform_device_unregister(alarm_platform_dev);
- misc_deregister(&alarm_device);
- alarm_rtc_dev = NULL;
- }
-}
-
-static struct class_interface rtc_alarm_interface = {
- .add_dev = &rtc_alarm_add_device,
- .remove_dev = &rtc_alarm_remove_device,
-};
-
-static struct platform_driver alarm_driver = {
- .suspend = alarm_suspend,
- .resume = alarm_resume,
- .driver = {
- .name = "alarm"
- }
-};
-
-static int __init alarm_late_init(void)
-{
- unsigned long flags;
- struct timespec system_time;
-
- /* this needs to run after the rtc is read at boot */
- spin_lock_irqsave(&alarm_slock, flags);
- /* We read the current rtc and system time so we can later calulate
- * elasped realtime to be (boot_systemtime + rtc - boot_rtc) ==
- * (rtc - (boot_rtc - boot_systemtime))
- */
- getnstimeofday(&elapsed_rtc_delta);
- ktime_get_ts(&system_time);
- elapsed_rtc_delta = timespec_sub(elapsed_rtc_delta, system_time);
- spin_unlock_irqrestore(&alarm_slock, flags);
-
- ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO,
- "alarm_late_init: rtc to elapsed realtime delta %ld.%09ld\n",
- elapsed_rtc_delta.tv_sec, elapsed_rtc_delta.tv_nsec);
- return 0;
-}
-
-static int __init alarm_init(void)
-{
- int err;
- int i;
-
- for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) {
- hrtimer_init(&alarm_timer[i], CLOCK_REALTIME, HRTIMER_MODE_ABS);
- alarm_timer[i].function = alarm_timer_triggered;
- }
- hrtimer_init(&alarm_timer[ANDROID_ALARM_SYSTEMTIME],
- CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
- alarm_timer[ANDROID_ALARM_SYSTEMTIME].function = alarm_timer_triggered;
- err = platform_driver_register(&alarm_driver);
- if (err < 0)
- goto err1;
- wake_lock_init(&alarm_wake_lock, WAKE_LOCK_SUSPEND, "alarm");
- wake_lock_init(&alarm_rtc_wake_lock, WAKE_LOCK_SUSPEND, "alarm_rtc");
- rtc_alarm_interface.class = rtc_class;
- err = class_interface_register(&rtc_alarm_interface);
- if (err < 0)
- goto err2;
-
- return 0;
-
-err2:
- wake_lock_destroy(&alarm_rtc_wake_lock);
- wake_lock_destroy(&alarm_wake_lock);
- platform_driver_unregister(&alarm_driver);
-err1:
- return err;
-}
-
-static void __exit alarm_exit(void)
-{
- class_interface_unregister(&rtc_alarm_interface);
- wake_lock_destroy(&alarm_rtc_wake_lock);
- wake_lock_destroy(&alarm_wake_lock);
- platform_driver_unregister(&alarm_driver);
-}
-
-late_initcall(alarm_late_init);
-module_init(alarm_init);
-module_exit(alarm_exit);
-
projects / firefly-linux-kernel-4.4.55.git / commitdiff