timekeeping: Make sure to notify hrtimers when TAI offset changes

Now that we have CLOCK_TAI timers, make sure we notify hrtimer
code when TAI offset is changed.

Signed-off-by: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/1365622909-953-1-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 7 insertions, 3 deletions

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c4d2a8751f3e..675f720a848b 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -607,6 +607,7 @@ void timekeeping_set_tai_offset(s32 tai_offset)
         __timekeeping_set_tai_offset(tk, tai_offset);
         write_seqcount_end(&timekeeper_seq);
         raw_spin_unlock_irqrestore(&timekeeper_lock, flags);
+        clock_was_set();
 }
 
 /**
@@ -1639,7 +1640,7 @@ int do_adjtimex(struct timex *txc)
         struct timekeeper *tk = &timekeeper;
         unsigned long flags;
         struct timespec ts;
-        s32 tai;
+        s32 orig_tai, tai;
         int ret;
 
         /* Validate the data before disabling interrupts */
@@ -1663,10 +1664,13 @@ int do_adjtimex(struct timex *txc)
         raw_spin_lock_irqsave(&timekeeper_lock, flags);
         write_seqcount_begin(&timekeeper_seq);
 
-        tai = tk->tai_offset;
+        orig_tai = tai = tk->tai_offset;
         ret = __do_adjtimex(txc, &ts, &tai);
 
-        __timekeeping_set_tai_offset(tk, tai);
+        if (tai != orig_tai) {
+                __timekeeping_set_tai_offset(tk, tai);
+                clock_was_set_delayed();
+        }
         write_seqcount_end(&timekeeper_seq);
         raw_spin_unlock_irqrestore(&timekeeper_lock, flags);