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authorJohn Stultz <john.stultz@linaro.org>2013-03-22 11:31:29 -0700
committerJohn Stultz <john.stultz@linaro.org>2013-04-04 13:18:14 -0700
commitaa6f9c595d857328e5d815e5b94c0e7cd31a6b59 (patch)
treebee031555304488a68e9f4dc76944b8924f11e7b /kernel/time
parentad460967a2953496ad76b1c22091ea99f21b4e86 (diff)
ntp: Move do_adjtimex() and hardpps() functions to timekeeping.c
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>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/ntp.c9
-rw-r--r--kernel/time/ntp_internal.h11
-rw-r--r--kernel/time/timekeeping.c21
3 files changed, 36 insertions, 5 deletions
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 457d2ba245fe..8b107068d7e3 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -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)
diff --git a/kernel/time/ntp_internal.h b/kernel/time/ntp_internal.h
new file mode 100644
index 000000000000..fdee80cb34f3
--- /dev/null
+++ b/kernel/time/ntp_internal.h
@@ -0,0 +1,11 @@
+#ifndef _LINUX_NTP_INTERNAL_H
+#define _LINUX_NTP_INTERNAL_H
+
+extern void ntp_init(void);
+extern void ntp_clear(void);
+/* Returns how long ticks are at present, in ns / 2^NTP_SCALE_SHIFT. */
+extern u64 ntp_tick_length(void);
+extern int second_overflow(unsigned long secs);
+extern int __do_adjtimex(struct timex *);
+extern void __hardpps(const struct timespec *, const struct timespec *);
+#endif /* _LINUX_NTP_INTERNAL_H */
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c5feb7aa3acb..a138ec2cde3e 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -24,6 +24,7 @@
#include <linux/pvclock_gtod.h>
#include "tick-internal.h"
+#include "ntp_internal.h"
static struct timekeeper timekeeper;
static DEFINE_RAW_SPINLOCK(timekeeper_lock);
@@ -1613,6 +1614,26 @@ ktime_t ktime_get_monotonic_offset(void)
EXPORT_SYMBOL_GPL(ktime_get_monotonic_offset);
/**
+ * do_adjtimex() - Accessor function to NTP __do_adjtimex function
+ */
+int do_adjtimex(struct timex *txc)
+{
+ return __do_adjtimex(txc);
+}
+
+
+#ifdef CONFIG_NTP_PPS
+/**
+ * hardpps() - Accessor function to NTP __hardpps function
+ */
+void hardpps(const struct timespec *phase_ts, const struct timespec *raw_ts)
+{
+ __hardpps(phase_ts, raw_ts);
+}
+EXPORT_SYMBOL(hardpps);
+#endif
+
+/**
* xtime_update() - advances the timekeeping infrastructure
* @ticks: number of ticks, that have elapsed since the last call.
*