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[PATCH] ntp: add time_freq to tick length

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This adds the frequency part to ntp_update_frequency().

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Roman Zippel 2006-09-30 23:28:24 -07:00 committed by Linus Torvalds
parent ab8783b688
commit dc6a43e46f
1 changed files with 3 additions and 5 deletions
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8
kernel/time/ntp.c
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@ -37,8 +37,7 @@ long time_tolerance = MAXFREQ; /* frequency tolerance (ppm) */
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;
@ -67,6 +66,7 @@ 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);
@ -163,8 +163,6 @@ 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
/*
@ -389,7 +387,7 @@ 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)