commit cc06268c6a87db156af2daed6e96a936b955cc82
author Thomas Gleixner <tglx@linutronix.de> Sun Nov 13 23:19:49 2011 +0000
committer John Stultz <john.stultz@linaro.org> Thu Jan 26 19:44:31 2012 -0800
tree 7edfb767cf3a58b82c8ee299d3689943b87d1d3d
parent 058892e632aa53be8255c2f0a42f9ace7bed66bb

time: Move common updates to a function

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>
Signed-off-by: John Stultz <john.stultz@linaro.org>

kernel/time/timekeeping.c

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 06f40ae..403c2a0 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -172,17 +172,26 @@
 	return clocksource_cyc2ns(cycle_delta, clock->mult, clock->shift);
 }
 
+/* must hold write on timekeeper.lock */
+static void timekeeping_update(bool clearntp)
+{
+	if (clearntp) {
+		timekeeper.ntp_error = 0;
+		ntp_clear();
+	}
+	update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
+			 timekeeper.clock, timekeeper.mult);
+}
+
+
 void timekeeping_leap_insert(int leapsecond)
 {
 	unsigned long flags;
 
 	write_seqlock_irqsave(&timekeeper.lock, flags);
-
 	timekeeper.xtime.tv_sec += leapsecond;
 	timekeeper.wall_to_monotonic.tv_sec -= leapsecond;
-	update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
-			 timekeeper.clock, timekeeper.mult);
-
+	timekeeping_update(false);
 	write_sequnlock_irqrestore(&timekeeper.lock, flags);
 
 }
@@ -386,12 +395,7 @@
 			timespec_sub(timekeeper.wall_to_monotonic, ts_delta);
 
 	timekeeper.xtime = *tv;
-
-	timekeeper.ntp_error = 0;
-	ntp_clear();
-
-	update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
-			timekeeper.clock, timekeeper.mult);
+	timekeeping_update(true);
 
 	write_sequnlock_irqrestore(&timekeeper.lock, flags);
 
@@ -425,11 +429,7 @@
 	timekeeper.wall_to_monotonic =
 				timespec_sub(timekeeper.wall_to_monotonic, *ts);
 
-	timekeeper.ntp_error = 0;
-	ntp_clear();
-
-	update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
-			timekeeper.clock, timekeeper.mult);
+	timekeeping_update(true);
 
 	write_sequnlock_irqrestore(&timekeeper.lock, flags);
 
@@ -668,10 +668,7 @@
 
 	__timekeeping_inject_sleeptime(delta);
 
-	timekeeper.ntp_error = 0;
-	ntp_clear();
-	update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
-			timekeeper.clock, timekeeper.mult);
+	timekeeping_update(true);
 
 	write_sequnlock_irqrestore(&timekeeper.lock, flags);
 
@@ -1083,9 +1080,7 @@
 		second_overflow();
 	}
 
-	/* check to see if there is a new clocksource to use */
-	update_vsyscall(&timekeeper.xtime, &timekeeper.wall_to_monotonic,
-			timekeeper.clock, timekeeper.mult);
+	timekeeping_update(false);
 
 out:
 	write_sequnlock_irqrestore(&timekeeper.lock, flags);