diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/clocksource.c | 22 | ||||
| -rw-r--r-- | kernel/time/tick-sched.c | 16 |
2 files changed, 23 insertions, 15 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 51b6a6a..c8a9d13 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -207,15 +207,12 @@ static inline void clocksource_resume_watchdog(void) { } */ void clocksource_resume(void) { - struct list_head *tmp; + struct clocksource *cs; unsigned long flags; spin_lock_irqsave(&clocksource_lock, flags); - list_for_each(tmp, &clocksource_list) { - struct clocksource *cs; - - cs = list_entry(tmp, struct clocksource, list); + list_for_each_entry(cs, &clocksource_list, list) { if (cs->resume) cs->resume(); } @@ -369,7 +366,6 @@ static ssize_t sysfs_override_clocksource(struct sys_device *dev, const char *buf, size_t count) { struct clocksource *ovr = NULL; - struct list_head *tmp; size_t ret = count; int len; @@ -389,12 +385,11 @@ static ssize_t sysfs_override_clocksource(struct sys_device *dev, len = strlen(override_name); if (len) { + struct clocksource *cs; + ovr = clocksource_override; /* try to select it: */ - list_for_each(tmp, &clocksource_list) { - struct clocksource *cs; - - cs = list_entry(tmp, struct clocksource, list); + list_for_each_entry(cs, &clocksource_list, list) { if (strlen(cs->name) == len && !strcmp(cs->name, override_name)) ovr = cs; @@ -422,14 +417,11 @@ static ssize_t sysfs_override_clocksource(struct sys_device *dev, static ssize_t sysfs_show_available_clocksources(struct sys_device *dev, char *buf) { - struct list_head *tmp; + struct clocksource *src; char *curr = buf; spin_lock_irq(&clocksource_lock); - list_for_each(tmp, &clocksource_list) { - struct clocksource *src; - - src = list_entry(tmp, struct clocksource, list); + list_for_each_entry(src, &clocksource_list, list) { curr += sprintf(curr, "%s ", src->name); } spin_unlock_irq(&clocksource_lock); diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index ce89ffb..10a1347 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -153,6 +153,7 @@ void tick_nohz_stop_sched_tick(void) unsigned long seq, last_jiffies, next_jiffies, delta_jiffies, flags; struct tick_sched *ts; ktime_t last_update, expires, now, delta; + struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev; int cpu; local_irq_save(flags); @@ -302,11 +303,26 @@ void tick_nohz_stop_sched_tick(void) out: ts->next_jiffies = next_jiffies; ts->last_jiffies = last_jiffies; + ts->sleep_length = ktime_sub(dev->next_event, now); end: local_irq_restore(flags); } /** + * tick_nohz_get_sleep_length - return the length of the current sleep + * + * Called from power state control code with interrupts disabled + */ +ktime_t tick_nohz_get_sleep_length(void) +{ + struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched); + + return ts->sleep_length; +} + +EXPORT_SYMBOL_GPL(tick_nohz_get_sleep_length); + +/** * nohz_restart_sched_tick - restart the idle tick from the idle task * * Restart the idle tick when the CPU is woken up from idle |