struct timekeeper {
/* Current clocksource used for timekeeping. */
struct clocksource *clock;
+ /* NTP adjusted clock multiplier */
+ u32 mult;
/* The shift value of the current clocksource. */
int shift;
/* Shift conversion between clock shifted nano seconds and
* ntp shifted nano seconds. */
int ntp_error_shift;
- /* NTP adjusted clock multiplier */
- u32 mult;
/* The current time */
struct timespec xtime;
return clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
}
-/* must hold xtime_lock */
+/* must hold write on timekeeper.lock */
+static void timekeeping_update(bool clearntp)
+{
+ if (clearntp) {
+ timekeeper.ntp_error = 0;
+ ntp_clear();
+ }
+ update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
+}
+
+
void timekeeping_leap_insert(int leapsecond)
{
unsigned long flags;
write_seqlock_irqsave(&timekeeper.lock, flags);
-
timekeeper.xtime.tv_sec += leapsecond;
timekeeper.wall_to_monotonic.tv_sec -= leapsecond;
- update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
- timekeeper.clock, timekeeper.mult);
-
+ timekeeping_update(false);
write_sequnlock_irqrestore(&timekeeper.lock, flags);
}
int do_settimeofday(const struct timespec *tv)
{
struct timespec ts_delta;
- unsigned long flags1,flags2;
+ unsigned long flags;
if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
- write_seqlock_irqsave(&xtime_lock, flags1);
- write_seqlock_irqsave(&timekeeper.lock, flags2);
+ write_seqlock_irqsave(&timekeeper.lock, flags);
timekeeping_forward_now();
timespec_sub(timekeeper.wall_to_monotonic, ts_delta);
timekeeper.xtime = *tv;
+ timekeeping_update(true);
- timekeeper.ntp_error = 0;
- ntp_clear();
-
- update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
- timekeeper.clock, timekeeper.mult);
-
- write_sequnlock_irqrestore(&timekeeper.lock, flags2);
- write_sequnlock_irqrestore(&xtime_lock, flags1);
+ write_sequnlock_irqrestore(&timekeeper.lock, flags);
/* signal hrtimers about time change */
clock_was_set();
*/
int timekeeping_inject_offset(struct timespec *ts)
{
- unsigned long flags1,flags2;
+ unsigned long flags;
if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
return -EINVAL;
- write_seqlock_irqsave(&xtime_lock, flags1);
- write_seqlock_irqsave(&timekeeper.lock, flags2);
+ write_seqlock_irqsave(&timekeeper.lock, flags);
timekeeping_forward_now();
timekeeper.wall_to_monotonic =
timespec_sub(timekeeper.wall_to_monotonic, *ts);
- timekeeper.ntp_error = 0;
- ntp_clear();
-
- update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
- timekeeper.clock, timekeeper.mult);
+ timekeeping_update(true);
- write_sequnlock_irqrestore(&timekeeper.lock, flags2);
- write_sequnlock_irqrestore(&xtime_lock, flags1);
+ write_sequnlock_irqrestore(&timekeeper.lock, flags);
/* signal hrtimers about time change */
clock_was_set();
seqlock_init(&timekeeper.lock);
- write_seqlock_irqsave(&xtime_lock, flags);
ntp_init();
- write_sequnlock_irqrestore(&xtime_lock, flags);
write_seqlock_irqsave(&timekeeper.lock, flags);
clock = clocksource_default_clock();
*/
void timekeeping_inject_sleeptime(struct timespec *delta)
{
- unsigned long flags1,flags2;
+ unsigned long flags;
struct timespec ts;
/* Make sure we don't set the clock twice */
if (!(ts.tv_sec == 0 && ts.tv_nsec == 0))
return;
- write_seqlock_irqsave(&xtime_lock, flags1);
- write_seqlock_irqsave(&timekeeper.lock, flags2);
+ write_seqlock_irqsave(&timekeeper.lock, flags);
timekeeping_forward_now();
__timekeeping_inject_sleeptime(delta);
- timekeeper.ntp_error = 0;
- ntp_clear();
- update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
- timekeeper.clock, timekeeper.mult);
+ timekeeping_update(true);
- write_sequnlock_irqrestore(&timekeeper.lock, flags2);
- write_sequnlock_irqrestore(&xtime_lock, flags1);
+ write_sequnlock_irqrestore(&timekeeper.lock, flags);
/* signal hrtimers about time change */
clock_was_set();
*/
static void timekeeping_resume(void)
{
- unsigned long flags1,flags2;
+ unsigned long flags;
struct timespec ts;
read_persistent_clock(&ts);
clocksource_resume();
- write_seqlock_irqsave(&xtime_lock, flags1);
- write_seqlock_irqsave(&timekeeper.lock, flags2);
+ write_seqlock_irqsave(&timekeeper.lock, flags);
if (timespec_compare(&ts, &timekeeping_suspend_time) > 0) {
ts = timespec_sub(ts, timekeeping_suspend_time);
timekeeper.clock->cycle_last = timekeeper.clock->read(timekeeper.clock);
timekeeper.ntp_error = 0;
timekeeping_suspended = 0;
- write_sequnlock_irqrestore(&timekeeper.lock, flags2);
- write_sequnlock_irqrestore(&xtime_lock, flags1);
+ write_sequnlock_irqrestore(&timekeeper.lock, flags);
touch_softlockup_watchdog();
static int timekeeping_suspend(void)
{
- unsigned long flags1,flags2;
+ unsigned long flags;
struct timespec delta, delta_delta;
static struct timespec old_delta;
read_persistent_clock(&timekeeping_suspend_time);
- write_seqlock_irqsave(&xtime_lock, flags1);
- write_seqlock_irqsave(&timekeeper.lock, flags2);
+ write_seqlock_irqsave(&timekeeper.lock, flags);
timekeeping_forward_now();
timekeeping_suspended = 1;
timekeeping_suspend_time =
timespec_add(timekeeping_suspend_time, delta_delta);
}
- write_sequnlock_irqrestore(&timekeeper.lock, flags2);
- write_sequnlock_irqrestore(&xtime_lock, flags1);
+ write_sequnlock_irqrestore(&timekeeper.lock, flags);
clockevents_notify(CLOCK_EVT_NOTIFY_SUSPEND, NULL);
clocksource_suspend();
/**
* update_wall_time - Uses the current clocksource to increment the wall time
*
- * Called from the timer interrupt, must hold a write on xtime_lock.
*/
static void update_wall_time(void)
{
second_overflow();
}
- /* check to see if there is a new clocksource to use */
- update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
- timekeeper.clock, timekeeper.mult);
+ timekeeping_update(false);
out:
write_sequnlock_irqrestore(&timekeeper.lock, flags);
return timespec_to_ktime(wtom);
}
+EXPORT_SYMBOL_GPL(ktime_get_monotonic_offset);
+
/**
* xtime_update() - advances the timekeeping infrastructure