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ntp: remove current_tick_length()

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current_tick_length used to do a little more, but now it just returns
tick_length, which we can also access directly at the few places, where it's
needed.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Zippel 2008-05-01 04:34:39 -07:00 committed by Linus Torvalds
parent 7fc5c78409
commit 8383c42399
3 changed files with 6 additions and 19 deletions
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4
include/linux/timex.h
View file

@ -239,8 +239,8 @@ static inline int ntp_synced(void)
#endif
#define NTP_INTERVAL_LENGTH (NSEC_PER_SEC/NTP_INTERVAL_FREQ)
/* Returns how long ticks are at present, in ns / 2^(SHIFT_SCALE-10). */
extern u64 current_tick_length(void);
/* Returns how long ticks are at present, in ns / 2^NTP_SCALE_SHIFT. */
extern u64 tick_length;
extern void second_overflow(void);
extern void update_ntp_one_tick(void);

16
kernel/time/ntp.c
View file

@ -23,7 +23,8 @@
*/
unsigned long tick_usec = TICK_USEC; /* USER_HZ period (usec) */
unsigned long tick_nsec; /* ACTHZ period (nsec) */
static u64 tick_length, tick_length_base;
u64 tick_length;
static u64 tick_length_base;
#define MAX_TICKADJ 500 /* microsecs */
#define MAX_TICKADJ_SCALED (((u64)(MAX_TICKADJ * NSEC_PER_USEC) << \
@ -203,19 +204,6 @@ void second_overflow(void)
}
}
/*
* Return how long ticks are at the moment, that is, how much time
* update_wall_time_one_tick will add to xtime next time we call it
* (assuming no calls to do_adjtimex in the meantime).
* The return value is in fixed-point nanoseconds shifted by the
* specified number of bits to the right of the binary point.
* This function has no side-effects.
*/
u64 current_tick_length(void)
{
return tick_length;
}
#ifdef CONFIG_GENERIC_CMOS_UPDATE
/* Disable the cmos update - used by virtualization and embedded */

5
kernel/time/timekeeping.c
View file

@ -380,8 +380,7 @@ static __always_inline int clocksource_bigadjust(s64 error, s64 *interval,
* Now calculate the error in (1 << look_ahead) ticks, but first
* remove the single look ahead already included in the error.
*/
tick_error = current_tick_length() >>
(NTP_SCALE_SHIFT - clock->shift + 1);
tick_error = tick_length >> (NTP_SCALE_SHIFT - clock->shift + 1);
tick_error -= clock->xtime_interval >> 1;
error = ((error - tick_error) >> look_ahead) + tick_error;
@ -473,7 +472,7 @@ void update_wall_time(void)
}
/* accumulate error between NTP and clock interval */
clock->error += current_tick_length();
clock->error += tick_length;
clock->error -= clock->xtime_interval << (NTP_SCALE_SHIFT - clock->shift);
}