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alarmtimers: Remove period from alarm structure

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Now that periodic alarmtimers are managed by the handler function,
remove the period value from the alarm structure and let the handlers
manage the interval on their own.

CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2011-08-10 12:09:24 -07:00
parent d77e23acce
commit 9e26476243
3 changed files with 19 additions and 19 deletions
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3
include/linux/alarmtimer.h
View File

@ -30,7 +30,6 @@ enum alarmtimer_restart {
*/
struct alarm {
struct timerqueue_node node;
ktime_t period;
enum alarmtimer_restart (*function)(struct alarm *, ktime_t now);
enum alarmtimer_type type;
bool enabled;
@ -39,7 +38,7 @@ struct alarm {
void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
enum alarmtimer_restart (*function)(struct alarm *, ktime_t));
void alarm_start(struct alarm *alarm, ktime_t start, ktime_t period);
void alarm_start(struct alarm *alarm, ktime_t start);
void alarm_cancel(struct alarm *alarm);
u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);

5
include/linux/posix-timers.h
View File

@ -81,7 +81,10 @@ struct k_itimer {
unsigned long incr;
unsigned long expires;
} mmtimer;
struct alarm alarmtimer;
struct {
struct alarm alarmtimer;
ktime_t interval;
} alarm;
struct rcu_head rcu;
} it;
};

30
kernel/time/alarmtimer.c
View File

@ -303,7 +303,6 @@ void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
enum alarmtimer_restart (*function)(struct alarm *, ktime_t))
{
timerqueue_init(&alarm->node);
alarm->period = ktime_set(0, 0);
alarm->function = function;
alarm->type = type;
alarm->enabled = 0;
@ -313,9 +312,8 @@ void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
* alarm_start - Sets an alarm to fire
* @alarm: ptr to alarm to set
* @start: time to run the alarm
* @period: period at which the alarm will recur
*/
void alarm_start(struct alarm *alarm, ktime_t start, ktime_t period)
void alarm_start(struct alarm *alarm, ktime_t start)
{
struct alarm_base *base = &alarm_bases[alarm->type];
unsigned long flags;
@ -324,7 +322,6 @@ void alarm_start(struct alarm *alarm, ktime_t start, ktime_t period)
if (alarm->enabled)
alarmtimer_remove(base, alarm);
alarm->node.expires = start;
alarm->period = period;
alarmtimer_enqueue(base, alarm);
alarm->enabled = 1;
spin_unlock_irqrestore(&base->lock, flags);
@ -405,13 +402,14 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm,
ktime_t now)
{
struct k_itimer *ptr = container_of(alarm, struct k_itimer,
it.alarmtimer);
it.alarm.alarmtimer);
if (posix_timer_event(ptr, 0) != 0)
ptr->it_overrun++;
/* Re-add periodic timers */
if (alarm->period.tv64) {
ptr->it_overrun += alarm_forward(alarm, now, alarm->period);
if (ptr->it.alarm.interval.tv64) {
ptr->it_overrun += alarm_forward(alarm, now,
ptr->it.alarm.interval);
return ALARMTIMER_RESTART;
}
return ALARMTIMER_NORESTART;
@ -471,7 +469,7 @@ static int alarm_timer_create(struct k_itimer *new_timer)
type = clock2alarm(new_timer->it_clock);
base = &alarm_bases[type];
alarm_init(&new_timer->it.alarmtimer, type, alarm_handle_timer);
alarm_init(&new_timer->it.alarm.alarmtimer, type, alarm_handle_timer);
return 0;
}
@ -488,9 +486,9 @@ static void alarm_timer_get(struct k_itimer *timr,
memset(cur_setting, 0, sizeof(struct itimerspec));
cur_setting->it_interval =
ktime_to_timespec(timr->it.alarmtimer.period);
ktime_to_timespec(timr->it.alarm.interval);
cur_setting->it_value =
ktime_to_timespec(timr->it.alarmtimer.node.expires);
ktime_to_timespec(timr->it.alarm.alarmtimer.node.expires);
return;
}
@ -505,7 +503,7 @@ static int alarm_timer_del(struct k_itimer *timr)
if (!rtcdev)
return -ENOTSUPP;
alarm_cancel(&timr->it.alarmtimer);
alarm_cancel(&timr->it.alarm.alarmtimer);
return 0;
}
@ -529,12 +527,12 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
alarm_timer_get(timr, old_setting);
/* If the timer was already set, cancel it */
alarm_cancel(&timr->it.alarmtimer);
alarm_cancel(&timr->it.alarm.alarmtimer);
/* start the timer */
alarm_start(&timr->it.alarmtimer,
timespec_to_ktime(new_setting->it_value),
timespec_to_ktime(new_setting->it_interval));
timr->it.alarm.interval = timespec_to_ktime(new_setting->it_interval);
alarm_start(&timr->it.alarm.alarmtimer,
timespec_to_ktime(new_setting->it_value));
return 0;
}
@ -567,7 +565,7 @@ static int alarmtimer_do_nsleep(struct alarm *alarm, ktime_t absexp)
alarm->data = (void *)current;
do {
set_current_state(TASK_INTERRUPTIBLE);
alarm_start(alarm, absexp, ktime_set(0, 0));
alarm_start(alarm, absexp);
if (likely(alarm->data))
schedule();