diff options
| -rw-r--r-- | include/linux/timex.h | 6 | ||||
| -rw-r--r-- | kernel/time/ntp.c | 40 |
2 files changed, 20 insertions, 26 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h index 261381b5da8..049dfe4a11f 100644 --- a/include/linux/timex.h +++ b/include/linux/timex.h @@ -198,21 +198,15 @@ extern int tickadj; /* amount of adjustment per tick */ /* * phase-lock loop variables */ -extern int time_state; /* clock status */ extern int time_status; /* clock synchronization status bits */ -extern long time_offset; /* time adjustment (us) */ -extern long time_constant; /* pll time constant */ -extern long time_precision; /* clock precision (us) */ extern long time_maxerror; /* maximum error */ extern long time_esterror; /* estimated error */ extern long time_freq; /* frequency offset (scaled ppm) */ -extern long time_reftime; /* time at last adjustment (s) */ extern long time_adjust; /* The amount of adjtime left */ extern void ntp_clear(void); -extern void ntp_update_frequency(void); /** * ntp_synced - Returns 1 if the NTP status is not UNSYNC diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c index 1ab5e9d7fa5..47195fa0ec4 100644 --- a/kernel/time/ntp.c +++ b/kernel/time/ntp.c @@ -30,17 +30,31 @@ static u64 tick_length, tick_length_base; * phase-lock loop variables */ /* TIME_ERROR prevents overwriting the CMOS clock */ -int time_state = TIME_OK; /* clock synchronization status */ +static int time_state = TIME_OK; /* clock synchronization status */ int time_status = STA_UNSYNC; /* clock status bits */ -long time_offset; /* time adjustment (ns) */ -long time_constant = 2; /* pll time constant */ -long time_precision = 1; /* clock precision (us) */ +static long time_offset; /* time adjustment (ns) */ +static long time_constant = 2; /* pll time constant */ long time_maxerror = NTP_PHASE_LIMIT; /* maximum error (us) */ long time_esterror = NTP_PHASE_LIMIT; /* estimated error (us) */ long time_freq; /* frequency offset (scaled ppm)*/ -long time_reftime; /* time at last adjustment (s) */ +static long time_reftime; /* time at last adjustment (s) */ long time_adjust; +#define CLOCK_TICK_OVERFLOW (LATCH * HZ - CLOCK_TICK_RATE) +#define CLOCK_TICK_ADJUST (((s64)CLOCK_TICK_OVERFLOW * NSEC_PER_SEC) / \ + (s64)CLOCK_TICK_RATE) + +static void ntp_update_frequency(void) +{ + tick_length_base = (u64)(tick_usec * NSEC_PER_USEC * USER_HZ) << TICK_LENGTH_SHIFT; + tick_length_base += (s64)CLOCK_TICK_ADJUST << TICK_LENGTH_SHIFT; + tick_length_base += (s64)time_freq << (TICK_LENGTH_SHIFT - SHIFT_NSEC); + + do_div(tick_length_base, HZ); + + tick_nsec = tick_length_base >> TICK_LENGTH_SHIFT; +} + /** * ntp_clear - Clears the NTP state variables * @@ -59,20 +73,6 @@ void ntp_clear(void) time_offset = 0; } -#define CLOCK_TICK_OVERFLOW (LATCH * HZ - CLOCK_TICK_RATE) -#define CLOCK_TICK_ADJUST (((s64)CLOCK_TICK_OVERFLOW * NSEC_PER_SEC) / (s64)CLOCK_TICK_RATE) - -void ntp_update_frequency(void) -{ - tick_length_base = (u64)(tick_usec * NSEC_PER_USEC * USER_HZ) << TICK_LENGTH_SHIFT; - tick_length_base += (s64)CLOCK_TICK_ADJUST << TICK_LENGTH_SHIFT; - tick_length_base += (s64)time_freq << (TICK_LENGTH_SHIFT - SHIFT_NSEC); - - do_div(tick_length_base, HZ); - - tick_nsec = tick_length_base >> TICK_LENGTH_SHIFT; -} - /* * this routine handles the overflow of the microsecond field * @@ -330,7 +330,7 @@ leave: if ((time_status & (STA_UNSYNC|STA_CLOCKERR)) != 0) txc->esterror = time_esterror; txc->status = time_status; txc->constant = time_constant; - txc->precision = time_precision; + txc->precision = 1; txc->tolerance = MAXFREQ; txc->tick = tick_usec; |