[ 077/108] time: Move common updates to a function

Ben Hutchings
2012-07-23T01:58:39Z

From: Thomas Gleixner <tglx@linutronix.de>

This is a backport of cc06268c6a87db156af2daed6e96a936b955cc82

[John Stultz: While not a bugfix itself, it allows following fixes
to backport in a more straightforward manner.]

CC: Thomas Gleixner <tglx@linutronix.de>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
kernel/time/timekeeping.c | 34 +++++++++++++++++-----------------
1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 5c9b67e..5d55185 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -166,6 +166,19 @@ static struct timespec total_sleep_time;
*/
static struct timespec raw_time;

+/* must hold write on xtime_lock */
+static void timekeeping_update(bool clearntp)
+{
+ if (clearntp) {
+ timekeeper.ntp_error = 0;
+ ntp_clear();
+ }
+ update_vsyscall(&xtime, &wall_to_monotonic,
+ timekeeper.clock, timekeeper.mult);
+}
+
+
+
/* flag for if timekeeping is suspended */
int __read_mostly timekeeping_suspended;

@@ -366,11 +379,7 @@ int do_settimeofday(const struct timespec *tv)

xtime = *tv;

- timekeeper.ntp_error = 0;
- ntp_clear();
-
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ timekeeping_update(true);

write_sequnlock_irqrestore(&xtime_lock, flags);

@@ -403,11 +412,7 @@ int timekeeping_inject_offset(struct timespec *ts)
xtime = timespec_add(xtime, *ts);
wall_to_monotonic = timespec_sub(wall_to_monotonic, *ts);

- timekeeper.ntp_error = 0;
- ntp_clear();
-
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ timekeeping_update(true);

write_sequnlock_irqrestore(&xtime_lock, flags);

@@ -636,10 +641,7 @@ void timekeeping_inject_sleeptime(struct timespec *delta)

__timekeeping_inject_sleeptime(delta);

- timekeeper.ntp_error = 0;
- ntp_clear();
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ timekeeping_update(true);

write_sequnlock_irqrestore(&xtime_lock, flags);

@@ -1052,9 +1054,7 @@ static void update_wall_time(void)
wall_to_monotonic.tv_sec -= leap;
}

- /* check to see if there is a new clocksource to use */
- update_vsyscall(&xtime, &wall_to_monotonic, timekeeper.clock,
- timekeeper.mult);
+ timekeeping_update(false);
}

/**