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Subject[NTP 3/9] add time_freq to tick length
This adds the frequency part to ntp_update_frequency().

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
---
kernel/time/ntp.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
Index: linux-2.6-mm/kernel/time/ntp.c
===================================================================
--- linux-2.6-mm.orig/kernel/time/ntp.c
+++ linux-2.6-mm/kernel/time/ntp.c
@@ -43,8 +43,7 @@ long time_tolerance = MAXFREQ; /* frequ
long time_precision = 1; /* clock precision (us) */
long time_maxerror = NTP_PHASE_LIMIT; /* maximum error (us) */
long time_esterror = NTP_PHASE_LIMIT; /* estimated error (us) */
-long time_freq = (((NSEC_PER_SEC + HZ/2) % HZ - HZ/2) << SHIFT_USEC) / NSEC_PER_USEC;
- /* frequency offset (scaled ppm)*/
+long time_freq; /* frequency offset (scaled ppm)*/
long time_reftime; /* time at last adjustment (s) */
long time_adjust;
long time_next_adjust;
@@ -73,6 +72,7 @@ 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 * NSEC_PER_USEC) << (TICK_LENGTH_SHIFT - SHIFT_USEC);

do_div(tick_length_base, HZ);

@@ -169,8 +169,6 @@ void second_overflow(void)
* Compute the frequency estimate and additional phase adjustment due
* to frequency error for the next second.
*/
- ltemp = time_freq;
- time_adj += shift_right(ltemp,(SHIFT_USEC + SHIFT_HZ - SHIFT_SCALE));

#if HZ == 100
/*
@@ -395,7 +393,7 @@ int do_adjtimex(struct timex *txc)
if (txc->modes & ADJ_TICK)
tick_usec = txc->tick;

- if (txc->modes & ADJ_TICK)
+ if (txc->modes & (ADJ_TICK|ADJ_FREQUENCY|ADJ_OFFSET))
ntp_update_frequency();
} /* txc->modes */
leave: if ((time_status & (STA_UNSYNC|STA_CLOCKERR)) != 0)
--

-
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