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[PATCH] kernel/time/ntp.c: possible cleanups

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This patch contains the following possible cleanups:
- make the following needlessly global function static:
  - ntp_update_frequency()
- make the following needlessly global variables static:
  - time_state
  - time_offset
  - time_constant
  - time_reftime
- remove the following read-only global variable:
  - time_precision

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: 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:
Adrian Bunk 2006-09-30 23:28:29 -07:00 committed by Linus Torvalds
parent 0883d899ef
commit 70bc42f90a
2 changed files with 20 additions and 26 deletions
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6
include/linux/timex.h
View File

@ -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

40
kernel/time/ntp.c
View File

@ -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;