int ntp_error_shift;
/* NTP adjusted clock multiplier */
u32 mult;
+
+ /* The current time */
+ struct timespec xtime;
+ /*
+ * wall_to_monotonic is what we need to add to xtime (or xtime corrected
+ * for sub jiffie times) to get to monotonic time. Monotonic is pegged
+ * at zero at system boot time, so wall_to_monotonic will be negative,
+ * however, we will ALWAYS keep the tv_nsec part positive so we can use
+ * the usual normalization.
+ *
+ * wall_to_monotonic is moved after resume from suspend for the
+ * monotonic time not to jump. We need to add total_sleep_time to
+ * wall_to_monotonic to get the real boot based time offset.
+ *
+ * - wall_to_monotonic is no longer the boot time, getboottime must be
+ * used instead.
+ */
+ struct timespec wall_to_monotonic;
+ /* time spent in suspend */
+ struct timespec total_sleep_time;
+ /* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
+ struct timespec raw_time;
};
static struct timekeeper timekeeper;
__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
-/*
- * The current time
- * wall_to_monotonic is what we need to add to xtime (or xtime corrected
- * for sub jiffie times) to get to monotonic time. Monotonic is pegged
- * at zero at system boot time, so wall_to_monotonic will be negative,
- * however, we will ALWAYS keep the tv_nsec part positive so we can use
- * the usual normalization.
- *
- * wall_to_monotonic is moved after resume from suspend for the monotonic
- * time not to jump. We need to add total_sleep_time to wall_to_monotonic
- * to get the real boot based time offset.
- *
- * - wall_to_monotonic is no longer the boot time, getboottime must be
- * used instead.
- */
-static struct timespec xtime __attribute__ ((aligned (16)));
-static struct timespec wall_to_monotonic __attribute__ ((aligned (16)));
-static struct timespec total_sleep_time;
-/*
- * The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock.
- */
-static struct timespec raw_time;
/* flag for if timekeeping is suspended */
int __read_mostly timekeeping_suspended;
/* must hold xtime_lock */
void timekeeping_leap_insert(int leapsecond)
{
- xtime.tv_sec += leapsecond;
- wall_to_monotonic.tv_sec -= leapsecond;
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ timekeeper.xtime.tv_sec += leapsecond;
+ timekeeper.wall_to_monotonic.tv_sec -= leapsecond;
+ update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
}
/**
/* If arch requires, add in gettimeoffset() */
nsec += arch_gettimeoffset();
- timespec_add_ns(&xtime, nsec);
+ timespec_add_ns(&timekeeper.xtime, nsec);
nsec = clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
- timespec_add_ns(&raw_time, nsec);
+ timespec_add_ns(&timekeeper.raw_time, nsec);
}
/**
do {
seq = read_seqbegin(&xtime_lock);
- *ts = xtime;
+ *ts = timekeeper.xtime;
nsecs = timekeeping_get_ns();
/* If arch requires, add in gettimeoffset() */
do {
seq = read_seqbegin(&xtime_lock);
- secs = xtime.tv_sec + wall_to_monotonic.tv_sec;
- nsecs = xtime.tv_nsec + wall_to_monotonic.tv_nsec;
+ secs = timekeeper.xtime.tv_sec +
+ timekeeper.wall_to_monotonic.tv_sec;
+ nsecs = timekeeper.xtime.tv_nsec +
+ timekeeper.wall_to_monotonic.tv_nsec;
nsecs += timekeeping_get_ns();
/* If arch requires, add in gettimeoffset() */
nsecs += arch_gettimeoffset();
do {
seq = read_seqbegin(&xtime_lock);
- *ts = xtime;
- tomono = wall_to_monotonic;
+ *ts = timekeeper.xtime;
+ tomono = timekeeper.wall_to_monotonic;
nsecs = timekeeping_get_ns();
/* If arch requires, add in gettimeoffset() */
nsecs += arch_gettimeoffset();
seq = read_seqbegin(&xtime_lock);
- *ts_raw = raw_time;
- *ts_real = xtime;
+ *ts_raw = timekeeper.raw_time;
+ *ts_real = timekeeper.xtime;
nsecs_raw = timekeeping_get_ns_raw();
nsecs_real = timekeeping_get_ns();
timekeeping_forward_now();
- ts_delta.tv_sec = tv->tv_sec - xtime.tv_sec;
- ts_delta.tv_nsec = tv->tv_nsec - xtime.tv_nsec;
- wall_to_monotonic = timespec_sub(wall_to_monotonic, ts_delta);
+ ts_delta.tv_sec = tv->tv_sec - timekeeper.xtime.tv_sec;
+ ts_delta.tv_nsec = tv->tv_nsec - timekeeper.xtime.tv_nsec;
+ timekeeper.wall_to_monotonic =
+ timespec_sub(timekeeper.wall_to_monotonic, ts_delta);
- xtime = *tv;
+ timekeeper.xtime = *tv;
timekeeper.ntp_error = 0;
ntp_clear();
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
write_sequnlock_irqrestore(&xtime_lock, flags);
timekeeping_forward_now();
- xtime = timespec_add(xtime, *ts);
- wall_to_monotonic = timespec_sub(wall_to_monotonic, *ts);
+ timekeeper.xtime = timespec_add(timekeeper.xtime, *ts);
+ timekeeper.wall_to_monotonic =
+ timespec_sub(timekeeper.wall_to_monotonic, *ts);
timekeeper.ntp_error = 0;
ntp_clear();
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
write_sequnlock_irqrestore(&xtime_lock, flags);
do {
seq = read_seqbegin(&xtime_lock);
nsecs = timekeeping_get_ns_raw();
- *ts = raw_time;
+ *ts = timekeeper.raw_time;
} while (read_seqretry(&xtime_lock, seq));
clock->enable(clock);
timekeeper_setup_internals(clock);
- xtime.tv_sec = now.tv_sec;
- xtime.tv_nsec = now.tv_nsec;
- raw_time.tv_sec = 0;
- raw_time.tv_nsec = 0;
+ timekeeper.xtime.tv_sec = now.tv_sec;
+ timekeeper.xtime.tv_nsec = now.tv_nsec;
+ timekeeper.raw_time.tv_sec = 0;
+ timekeeper.raw_time.tv_nsec = 0;
if (boot.tv_sec == 0 && boot.tv_nsec == 0) {
- boot.tv_sec = xtime.tv_sec;
- boot.tv_nsec = xtime.tv_nsec;
+ boot.tv_sec = timekeeper.xtime.tv_sec;
+ boot.tv_nsec = timekeeper.xtime.tv_nsec;
}
- set_normalized_timespec(&wall_to_monotonic,
+ set_normalized_timespec(&timekeeper.wall_to_monotonic,
-boot.tv_sec, -boot.tv_nsec);
- total_sleep_time.tv_sec = 0;
- total_sleep_time.tv_nsec = 0;
+ timekeeper.total_sleep_time.tv_sec = 0;
+ timekeeper.total_sleep_time.tv_nsec = 0;
write_sequnlock_irqrestore(&xtime_lock, flags);
}
return;
}
- xtime = timespec_add(xtime, *delta);
- wall_to_monotonic = timespec_sub(wall_to_monotonic, *delta);
- total_sleep_time = timespec_add(total_sleep_time, *delta);
+ timekeeper.xtime = timespec_add(timekeeper.xtime, *delta);
+ timekeeper.wall_to_monotonic =
+ timespec_sub(timekeeper.wall_to_monotonic, *delta);
+ timekeeper.total_sleep_time = timespec_add(
+ timekeeper.total_sleep_time, *delta);
}
timekeeper.ntp_error = 0;
ntp_clear();
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
write_sequnlock_irqrestore(&xtime_lock, flags);
* try to compensate so the difference in system time
* and persistent_clock time stays close to constant.
*/
- delta = timespec_sub(xtime, timekeeping_suspend_time);
+ delta = timespec_sub(timekeeper.xtime, timekeeping_suspend_time);
delta_delta = timespec_sub(delta, old_delta);
if (abs(delta_delta.tv_sec) >= 2) {
/*
timekeeper.xtime_nsec += timekeeper.xtime_interval << shift;
while (timekeeper.xtime_nsec >= nsecps) {
timekeeper.xtime_nsec -= nsecps;
- xtime.tv_sec++;
+ timekeeper.xtime.tv_sec++;
second_overflow();
}
/* Accumulate raw time */
raw_nsecs = timekeeper.raw_interval << shift;
- raw_nsecs += raw_time.tv_nsec;
+ raw_nsecs += timekeeper.raw_time.tv_nsec;
if (raw_nsecs >= NSEC_PER_SEC) {
u64 raw_secs = raw_nsecs;
raw_nsecs = do_div(raw_secs, NSEC_PER_SEC);
- raw_time.tv_sec += raw_secs;
+ timekeeper.raw_time.tv_sec += raw_secs;
}
- raw_time.tv_nsec = raw_nsecs;
+ timekeeper.raw_time.tv_nsec = raw_nsecs;
/* Accumulate error between NTP and clock interval */
timekeeper.ntp_error += tick_length << shift;
#else
offset = (clock->read(clock) - clock->cycle_last) & clock->mask;
#endif
- timekeeper.xtime_nsec = (s64)xtime.tv_nsec << timekeeper.shift;
+ timekeeper.xtime_nsec = (s64)timekeeper.xtime.tv_nsec <<
+ timekeeper.shift;
/*
* With NO_HZ we may have to accumulate many cycle_intervals
* Store full nanoseconds into xtime after rounding it up and
* add the remainder to the error difference.
*/
- xtime.tv_nsec = ((s64) timekeeper.xtime_nsec >> timekeeper.shift) + 1;
- timekeeper.xtime_nsec -= (s64) xtime.tv_nsec << timekeeper.shift;
+ timekeeper.xtime.tv_nsec = ((s64)timekeeper.xtime_nsec >>
+ timekeeper.shift) + 1;
+ timekeeper.xtime_nsec -= (s64)timekeeper.xtime.tv_nsec <<
+ timekeeper.shift;
timekeeper.ntp_error += timekeeper.xtime_nsec <<
timekeeper.ntp_error_shift;
* Finally, make sure that after the rounding
* xtime.tv_nsec isn't larger then NSEC_PER_SEC
*/
- if (unlikely(xtime.tv_nsec >= NSEC_PER_SEC)) {
- xtime.tv_nsec -= NSEC_PER_SEC;
- xtime.tv_sec++;
+ if (unlikely(timekeeper.xtime.tv_nsec >= NSEC_PER_SEC)) {
+ timekeeper.xtime.tv_nsec -= NSEC_PER_SEC;
+ timekeeper.xtime.tv_sec++;
second_overflow();
}
/* check to see if there is a new clocksource to use */
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
}
/**
void getboottime(struct timespec *ts)
{
struct timespec boottime = {
- .tv_sec = wall_to_monotonic.tv_sec + total_sleep_time.tv_sec,
- .tv_nsec = wall_to_monotonic.tv_nsec + total_sleep_time.tv_nsec
+ .tv_sec = timekeeper.wall_to_monotonic.tv_sec +
+ timekeeper.total_sleep_time.tv_sec,
+ .tv_nsec = timekeeper.wall_to_monotonic.tv_nsec +
+ timekeeper.total_sleep_time.tv_nsec
};
set_normalized_timespec(ts, -boottime.tv_sec, -boottime.tv_nsec);
do {
seq = read_seqbegin(&xtime_lock);
- *ts = xtime;
- tomono = wall_to_monotonic;
- sleep = total_sleep_time;
+ *ts = timekeeper.xtime;
+ tomono = timekeeper.wall_to_monotonic;
+ sleep = timekeeper.total_sleep_time;
nsecs = timekeeping_get_ns();
} while (read_seqretry(&xtime_lock, seq));
*/
void monotonic_to_bootbased(struct timespec *ts)
{
- *ts = timespec_add(*ts, total_sleep_time);
+ *ts = timespec_add(*ts, timekeeper.total_sleep_time);
}
EXPORT_SYMBOL_GPL(monotonic_to_bootbased);
unsigned long get_seconds(void)
{
- return xtime.tv_sec;
+ return timekeeper.xtime.tv_sec;
}
EXPORT_SYMBOL(get_seconds);
struct timespec __current_kernel_time(void)
{
- return xtime;
+ return timekeeper.xtime;
}
struct timespec current_kernel_time(void)
do {
seq = read_seqbegin(&xtime_lock);
- now = xtime;
+ now = timekeeper.xtime;
} while (read_seqretry(&xtime_lock, seq));
return now;
do {
seq = read_seqbegin(&xtime_lock);
- now = xtime;
- mono = wall_to_monotonic;
+ now = timekeeper.xtime;
+ mono = timekeeper.wall_to_monotonic;
} while (read_seqretry(&xtime_lock, seq));
set_normalized_timespec(&now, now.tv_sec + mono.tv_sec,
do {
seq = read_seqbegin(&xtime_lock);
- *xtim = xtime;
- *wtom = wall_to_monotonic;
- *sleep = total_sleep_time;
+ *xtim = timekeeper.xtime;
+ *wtom = timekeeper.wall_to_monotonic;
+ *sleep = timekeeper.total_sleep_time;
} while (read_seqretry(&xtime_lock, seq));
}
do {
seq = read_seqbegin(&xtime_lock);
- wtom = wall_to_monotonic;
+ wtom = timekeeper.wall_to_monotonic;
} while (read_seqretry(&xtime_lock, seq));
return timespec_to_ktime(wtom);
}
projects / deliverable / linux.git / blobdiff