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ntp: Move do_adjtimex() and hardpps() functions to timekeeping.c

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In preparation for changing the ntp locking rules, move
do_adjtimex and hardpps accessor functions to timekeeping.c,
but keep the code logic in ntp.c.

This patch also introduces a ntp_internal.h file so timekeeping
specific interfaces of ntp.c can be more limitedly shared with
timekeeping.c.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz 2013-03-22 11:31:29 -07:00
parent ad460967a2
commit aa6f9c595d
4 changed files with 36 additions and 12 deletions
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9
kernel/time/ntp.c
View file

@ -18,6 +18,7 @@
#include <linux/rtc.h>
#include "tick-internal.h"
#include "ntp_internal.h"
/*
* NTP timekeeping variables:
@ -661,7 +662,7 @@ int ntp_validate_timex(struct timex *txc)
* adjtimex mainly allows reading (and writing, if superuser) of
* kernel time-keeping variables. used by xntpd.
*/
int do_adjtimex(struct timex *txc)
int __do_adjtimex(struct timex *txc)
{
struct timespec ts;
u32 time_tai, orig_tai;
@ -911,7 +912,7 @@ static void hardpps_update_phase(long error)
}
/*
* hardpps() - discipline CPU clock oscillator to external PPS signal
* __hardpps() - discipline CPU clock oscillator to external PPS signal
*
* This routine is called at each PPS signal arrival in order to
* discipline the CPU clock oscillator to the PPS signal. It takes two
@ -922,7 +923,7 @@ static void hardpps_update_phase(long error)
* This code is based on David Mills's reference nanokernel
* implementation. It was mostly rewritten but keeps the same idea.
*/
void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
void __hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
{
struct pps_normtime pts_norm, freq_norm;
unsigned long flags;
@ -976,8 +977,6 @@ void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
raw_spin_unlock_irqrestore(&ntp_lock, flags);
}
EXPORT_SYMBOL(hardpps);
#endif /* CONFIG_NTP_PPS */
static int __init ntp_tick_adj_setup(char *str)