summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJohn Stultz <john.stultz@linaro.org>2011-08-10 12:09:24 -0700
committerJohn Stultz <john.stultz@linaro.org>2011-08-10 14:55:26 -0700
commit9e26476243e438f4534a562660c1296a15a9e202 (patch)
treed70609d91f0aab85ad9768500b7e57623d9e3eae
parentd77e23accec56bf2ba12187fe77a2f500a511282 (diff)
downloadop-kernel-dev-9e26476243e438f4534a562660c1296a15a9e202.zip
op-kernel-dev-9e26476243e438f4534a562660c1296a15a9e202.tar.gz
alarmtimers: Remove period from alarm structure
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>
-rw-r--r--include/linux/alarmtimer.h3
-rw-r--r--include/linux/posix-timers.h5
-rw-r--r--kernel/time/alarmtimer.c30
3 files changed, 19 insertions, 19 deletions
diff --git a/include/linux/alarmtimer.h b/include/linux/alarmtimer.h
index 1753596..c854a8e 100644
--- a/include/linux/alarmtimer.h
+++ b/include/linux/alarmtimer.h
@@ -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);
diff --git a/include/linux/posix-timers.h b/include/linux/posix-timers.h
index 959c141..042058f 100644
--- a/include/linux/posix-timers.h
+++ b/include/linux/posix-timers.h
@@ -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;
};
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index a522c00..9093559 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -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();
OpenPOWER on IntegriCloud