long time_adjust;
-static long ntp_tick_adj;
+/* constant (boot-param configurable) NTP tick adjustment (upscaled) */
+static s64 ntp_tick_adj;
/*
* NTP methods:
second_length = (u64)(tick_usec * NSEC_PER_USEC * USER_HZ)
<< NTP_SCALE_SHIFT;
- second_length += (s64)ntp_tick_adj << NTP_SCALE_SHIFT;
+ second_length += ntp_tick_adj;
second_length += time_freq;
tick_nsec = div_u64(second_length, HZ) >> NTP_SCALE_SHIFT;
case TIME_OK:
break;
case TIME_INS:
- xtime.tv_sec--;
- wall_to_monotonic.tv_sec++;
+ timekeeping_leap_insert(-1);
time_state = TIME_OOP;
printk(KERN_NOTICE
"Clock: inserting leap second 23:59:60 UTC\n");
res = HRTIMER_RESTART;
break;
case TIME_DEL:
- xtime.tv_sec++;
+ timekeeping_leap_insert(1);
time_tai--;
- wall_to_monotonic.tv_sec--;
time_state = TIME_WAIT;
printk(KERN_NOTICE
"Clock: deleting leap second 23:59:59 UTC\n");
time_state = TIME_OK;
break;
}
- update_vsyscall(&xtime, clock);
write_sequnlock(&xtime_lock);
*/
void second_overflow(void)
{
- s64 time_adj;
+ s64 delta;
/* Bump the maxerror field */
time_maxerror += MAXFREQ / NSEC_PER_USEC;
* Compute the phase adjustment for the next second. The offset is
* reduced by a fixed factor times the time constant.
*/
- tick_length = tick_length_base;
- time_adj = shift_right(time_offset, SHIFT_PLL + time_constant);
- time_offset -= time_adj;
- tick_length += time_adj;
+ tick_length = tick_length_base;
+
+ delta = shift_right(time_offset, SHIFT_PLL + time_constant);
+ time_offset -= delta;
+ tick_length += delta;
if (!time_adjust)
return;
static inline void notify_cmos_timer(void) { }
#endif
+/*
+ * Start the leap seconds timer:
+ */
+static inline void ntp_start_leap_timer(struct timespec *ts)
+{
+ long now = ts->tv_sec;
+
+ if (time_status & STA_INS) {
+ time_state = TIME_INS;
+ now += 86400 - now % 86400;
+ hrtimer_start(&leap_timer, ktime_set(now, 0), HRTIMER_MODE_ABS);
+
+ return;
+ }
+
+ if (time_status & STA_DEL) {
+ time_state = TIME_DEL;
+ now += 86400 - (now + 1) % 86400;
+ hrtimer_start(&leap_timer, ktime_set(now, 0), HRTIMER_MODE_ABS);
+ }
+}
/*
* Propagate a new txc->status value into the NTP state:
*/
static inline void process_adj_status(struct timex *txc, struct timespec *ts)
{
- long now;
-
if ((time_status & STA_PLL) && !(txc->status & STA_PLL)) {
time_state = TIME_OK;
time_status = STA_UNSYNC;
}
- /* only set allowed bits */
- time_status &= STA_RONLY;
/*
* If we turn on PLL adjustments then reset the
if (!(time_status & STA_PLL) && (txc->status & STA_PLL))
time_reftime = xtime.tv_sec;
+ /* only set allowed bits */
+ time_status &= STA_RONLY;
time_status |= txc->status & ~STA_RONLY;
switch (time_state) {
case TIME_OK:
- start_timer:
- now = ts->tv_sec;
- if (time_status & STA_INS) {
- time_state = TIME_INS;
- now += 86400 - now % 86400;
- hrtimer_start(&leap_timer, ktime_set(now, 0), HRTIMER_MODE_ABS);
- } else if (time_status & STA_DEL) {
- time_state = TIME_DEL;
- now += 86400 - (now + 1) % 86400;
- hrtimer_start(&leap_timer, ktime_set(now, 0), HRTIMER_MODE_ABS);
- }
+ ntp_start_leap_timer(ts);
break;
case TIME_INS:
case TIME_DEL:
time_state = TIME_OK;
- goto start_timer;
+ ntp_start_leap_timer(ts);
case TIME_WAIT:
if (!(time_status & (STA_INS | STA_DEL)))
time_state = TIME_OK;
if (txc->modes & ADJ_NANO)
time_status |= STA_NANO;
+
if (txc->modes & ADJ_MICRO)
time_status &= ~STA_NANO;
if (txc->modes & ADJ_FREQUENCY) {
- time_freq = (s64)txc->freq * PPM_SCALE;
+ time_freq = txc->freq * PPM_SCALE;
time_freq = min(time_freq, MAXFREQ_SCALED);
time_freq = max(time_freq, -MAXFREQ_SCALED);
}
if (txc->modes & ADJ_MAXERROR)
time_maxerror = txc->maxerror;
+
if (txc->modes & ADJ_ESTERROR)
time_esterror = txc->esterror;
if (txc->modes & ADJ_OFFSET)
ntp_update_offset(txc->offset);
+
if (txc->modes & ADJ_TICK)
tick_usec = txc->tick;
if (txc->modes & ADJ_TICK &&
(txc->tick < 900000/USER_HZ ||
txc->tick > 1100000/USER_HZ))
- return -EINVAL;
+ return -EINVAL;
if (txc->modes & ADJ_STATUS && time_state != TIME_OK)
hrtimer_cancel(&leap_timer);
write_seqlock_irq(&xtime_lock);
- /* If there are input parameters, then process them */
if (txc->modes & ADJ_ADJTIME) {
long save_adjust = time_adjust;
ntp_update_frequency();
}
txc->offset = save_adjust;
- goto adj_done;
- }
+ } else {
- /* If there are input parameters, then process them: */
- if (txc->modes)
- process_adjtimex_modes(txc, &ts);
+ /* If there are input parameters, then process them: */
+ if (txc->modes)
+ process_adjtimex_modes(txc, &ts);
- txc->offset = shift_right(time_offset * NTP_INTERVAL_FREQ,
+ txc->offset = shift_right(time_offset * NTP_INTERVAL_FREQ,
NTP_SCALE_SHIFT);
- if (!(time_status & STA_NANO))
- txc->offset /= NSEC_PER_USEC;
+ if (!(time_status & STA_NANO))
+ txc->offset /= NSEC_PER_USEC;
+ }
-adj_done:
result = time_state; /* mostly `TIME_OK' */
if (time_status & (STA_UNSYNC|STA_CLOCKERR))
result = TIME_ERROR;
txc->freq = shift_right((time_freq >> PPM_SCALE_INV_SHIFT) *
- (s64)PPM_SCALE_INV, NTP_SCALE_SHIFT);
+ PPM_SCALE_INV, NTP_SCALE_SHIFT);
txc->maxerror = time_maxerror;
txc->esterror = time_esterror;
txc->status = time_status;
txc->calcnt = 0;
txc->errcnt = 0;
txc->stbcnt = 0;
+
write_sequnlock_irq(&xtime_lock);
txc->time.tv_sec = ts.tv_sec;
static int __init ntp_tick_adj_setup(char *str)
{
ntp_tick_adj = simple_strtol(str, NULL, 0);
+ ntp_tick_adj <<= NTP_SCALE_SHIFT;
+
return 1;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff