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Subject[tip:timers/core] timekeeping: Introduce timekeeping_leap_insert
Commit-ID:  31089c13bcb18d2cd2a3ddfbe3a28666346f237e
Gitweb: http://git.kernel.org/tip/31089c13bcb18d2cd2a3ddfbe3a28666346f237e
Author: John Stultz <johnstul@us.ibm.com>
AuthorDate: Fri, 14 Aug 2009 15:47:18 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Sat, 15 Aug 2009 10:55:45 +0200

timekeeping: Introduce timekeeping_leap_insert

Move the adjustment of xtime, wall_to_monotonic and the update of the
vsyscall variables to the timekeeping code.

Signed-off-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
LKML-Reference: <20090814134807.609730216@de.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>


---
include/linux/time.h | 1 +
kernel/time/ntp.c | 7 ++-----
kernel/time/timekeeping.c | 7 +++++++
3 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/include/linux/time.h b/include/linux/time.h
index ea16c1a..e7c8445 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -147,6 +147,7 @@ extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
extern int timekeeping_valid_for_hres(void);
extern void update_wall_time(void);
extern void update_xtime_cache(u64 nsec);
+extern void timekeeping_leap_insert(int leapsecond);

struct tms;
extern void do_sys_times(struct tms *);
diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 7fc6437..4800f93 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -194,8 +194,7 @@ static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
case TIME_OK:
break;
case TIME_INS:
- xtime.tv_sec--;
- wall_to_monotonic.tv_sec++;
+ timekeeping_leap_insert(-1);
time_state = TIME_OOP;
printk(KERN_NOTICE
"Clock: inserting leap second 23:59:60 UTC\n");
@@ -203,9 +202,8 @@ static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
res = HRTIMER_RESTART;
break;
case TIME_DEL:
- xtime.tv_sec++;
+ timekeeping_leap_insert(1);
time_tai--;
- wall_to_monotonic.tv_sec--;
time_state = TIME_WAIT;
printk(KERN_NOTICE
"Clock: deleting leap second 23:59:59 UTC\n");
@@ -219,7 +217,6 @@ static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
time_state = TIME_OK;
break;
}
- update_vsyscall(&xtime, clock);

write_sequnlock(&xtime_lock);

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 02c0b2c..b8b70fb 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -58,6 +58,13 @@ void update_xtime_cache(u64 nsec)

struct clocksource *clock;

+/* must hold xtime_lock */
+void timekeeping_leap_insert(int leapsecond)
+{
+ xtime.tv_sec += leapsecond;
+ wall_to_monotonic.tv_sec -= leapsecond;
+ update_vsyscall(&xtime, clock);
+}

#ifdef CONFIG_GENERIC_TIME
/**

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