From 5089ea15baa9e7b0cb49f36881f2cb27bf281789 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 11 Jul 2018 14:47:12 +0200 Subject: rtc: use ktime_get_real_ts64() instead of getnstimeofday64() getnstimeofday64() is just a wrapper around the ktime accessor, so we should use that directly. I considered using ktime_get_boottime_ts64() (to avoid leap second problems) or ktime_get_real_seconds() (to simplify the calculation, but in the end concluded that the existing interface is probably the most appropriate in this case. Signed-off-by: Arnd Bergmann Signed-off-by: Alexandre Belloni --- drivers/rtc/class.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/rtc/class.c') diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index d37588f08055..7fa32c922617 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -68,7 +68,7 @@ static int rtc_suspend(struct device *dev) return 0; } - getnstimeofday64(&old_system); + ktime_get_real_ts64(&old_system); old_rtc.tv_sec = rtc_tm_to_time64(&tm); @@ -110,7 +110,7 @@ static int rtc_resume(struct device *dev) return 0; /* snapshot the current rtc and system time at resume */ - getnstimeofday64(&new_system); + ktime_get_real_ts64(&new_system); err = rtc_read_time(rtc, &tm); if (err < 0) { pr_debug("%s: fail to read rtc time\n", dev_name(&rtc->dev)); -- cgit v1.2.3 From acecb3ad8b21a519ce4ad728106d45d4e978bb56 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni Date: Wed, 25 Jul 2018 14:58:10 +0200 Subject: rtc: remove irq_task and irq_task_lock There is no way to set a periodic task anymore, remove task pointer and lock. Signed-off-by: Alexandre Belloni --- drivers/rtc/class.c | 1 - drivers/rtc/interface.c | 50 ++++++++++--------------------------------------- include/linux/rtc.h | 2 -- 3 files changed, 10 insertions(+), 43 deletions(-) (limited to 'drivers/rtc/class.c') diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index 7fa32c922617..0fca4d74c76b 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -172,7 +172,6 @@ static struct rtc_device *rtc_allocate_device(void) mutex_init(&rtc->ops_lock); spin_lock_init(&rtc->irq_lock); - spin_lock_init(&rtc->irq_task_lock); init_waitqueue_head(&rtc->irq_queue); /* Init timerqueue */ diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 2b1b9a0b9f8a..ae0d67610c7b 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -605,12 +605,6 @@ void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode) rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode); spin_unlock_irqrestore(&rtc->irq_lock, flags); - /* call the task func */ - spin_lock_irqsave(&rtc->irq_task_lock, flags); - if (rtc->irq_task) - rtc->irq_task->func(rtc->irq_task->private_data); - spin_unlock_irqrestore(&rtc->irq_task_lock, flags); - wake_up_interruptible(&rtc->irq_queue); kill_fasync(&rtc->async_queue, SIGIO, POLL_IN); } @@ -750,28 +744,16 @@ static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled) * Context: any * * Note that rtc_irq_set_freq() should previously have been used to - * specify the desired frequency of periodic IRQ task->func() callbacks. + * specify the desired frequency of periodic IRQ. */ int rtc_irq_set_state(struct rtc_device *rtc, struct rtc_task *task, int enabled) { int err = 0; - unsigned long flags; -retry: - spin_lock_irqsave(&rtc->irq_task_lock, flags); - if (rtc->irq_task != NULL && task == NULL) - err = -EBUSY; - else if (rtc->irq_task != task) - err = -EACCES; - else { - if (rtc_update_hrtimer(rtc, enabled) < 0) { - spin_unlock_irqrestore(&rtc->irq_task_lock, flags); - cpu_relax(); - goto retry; - } - rtc->pie_enabled = enabled; - } - spin_unlock_irqrestore(&rtc->irq_task_lock, flags); + while (rtc_update_hrtimer(rtc, enabled) < 0) + cpu_relax(); + + rtc->pie_enabled = enabled; trace_rtc_irq_set_state(enabled, err); return err; @@ -782,7 +764,7 @@ EXPORT_SYMBOL_GPL(rtc_irq_set_state); * rtc_irq_set_freq - set 2^N Hz periodic IRQ frequency for IRQ * @rtc: the rtc device * @task: currently registered with rtc_irq_register() - * @freq: positive frequency with which task->func() will be called + * @freq: positive frequency * Context: any * * Note that rtc_irq_set_state() is used to enable or disable the @@ -791,25 +773,13 @@ EXPORT_SYMBOL_GPL(rtc_irq_set_state); int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq) { int err = 0; - unsigned long flags; if (freq <= 0 || freq > RTC_MAX_FREQ) return -EINVAL; -retry: - spin_lock_irqsave(&rtc->irq_task_lock, flags); - if (rtc->irq_task != NULL && task == NULL) - err = -EBUSY; - else if (rtc->irq_task != task) - err = -EACCES; - else { - rtc->irq_freq = freq; - if (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0) { - spin_unlock_irqrestore(&rtc->irq_task_lock, flags); - cpu_relax(); - goto retry; - } - } - spin_unlock_irqrestore(&rtc->irq_task_lock, flags); + + rtc->irq_freq = freq; + while (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0) + cpu_relax(); trace_rtc_irq_set_freq(freq, err); return err; diff --git a/include/linux/rtc.h b/include/linux/rtc.h index f868d6b619ab..8cc23fdfd4ee 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -121,8 +121,6 @@ struct rtc_device { wait_queue_head_t irq_queue; struct fasync_struct *async_queue; - struct rtc_task *irq_task; - spinlock_t irq_task_lock; int irq_freq; int max_user_freq; -- cgit v1.2.3