timekeeping: Fix CLOCK_TAI timer/nanosleep delays

[~andy/linux] / kernel / time / timekeeping.c

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 051855fe68bcb560a21ebe71e5ad18483a75e8d5..3f6a827680faa0a13c4dcf3f5d78656cf060d75e 100644 (file)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -77,7 +77,7 @@ static void tk_set_wall_to_mono(struct timekeeper *tk, struct timespec wtm)
        tk->wall_to_monotonic = wtm;
        set_normalized_timespec(&tmp, -wtm.tv_sec, -wtm.tv_nsec);
        tk->offs_real = timespec_to_ktime(tmp);
-       tk->offs_tai = ktime_sub(tk->offs_real, ktime_set(tk->tai_offset, 0));
+       tk->offs_tai = ktime_add(tk->offs_real, ktime_set(tk->tai_offset, 0));
 }
 
 static void tk_set_sleep_time(struct timekeeper *tk, struct timespec t)
@@ -595,7 +595,7 @@ s32 timekeeping_get_tai_offset(void)
 static void __timekeeping_set_tai_offset(struct timekeeper *tk, s32 tai_offset)
 {
        tk->tai_offset = tai_offset;
-       tk->offs_tai = ktime_sub(tk->offs_real, ktime_set(tai_offset, 0));
+       tk->offs_tai = ktime_add(tk->offs_real, ktime_set(tai_offset, 0));
 }
 
 /**
@@ -1278,7 +1278,6 @@ static inline unsigned int accumulate_nsecs_to_secs(struct timekeeper *tk)
 
                        __timekeeping_set_tai_offset(tk, tk->tai_offset - leap);
 
-                       clock_was_set_delayed();
                        clock_set = TK_CLOCK_WAS_SET;
                }
        }
@@ -1361,7 +1360,7 @@ static inline void old_vsyscall_fixup(struct timekeeper *tk)
  * update_wall_time - Uses the current clocksource to increment the wall time
  *
  */
-static void update_wall_time(void)
+void update_wall_time(void)
 {
        struct clocksource *clock;
        struct timekeeper *real_tk = &timekeeper;
@@ -1442,6 +1441,8 @@ static void update_wall_time(void)
        write_seqcount_end(&timekeeper_seq);
 out:
        raw_spin_unlock_irqrestore(&timekeeper_lock, flags);
+       if (clock_set)
+               clock_was_set();
 }
 
 /**
@@ -1586,7 +1587,6 @@ struct timespec get_monotonic_coarse(void)
 void do_timer(unsigned long ticks)
 {
        jiffies_64 += ticks;
-       update_wall_time();
        calc_global_load(ticks);
 }
 
@@ -1702,11 +1702,13 @@ int do_adjtimex(struct timex *txc)
        if (tai != orig_tai) {
                __timekeeping_set_tai_offset(tk, tai);
                timekeeping_update(tk, TK_MIRROR | TK_CLOCK_WAS_SET);
-               clock_was_set_delayed();
        }
        write_seqcount_end(&timekeeper_seq);
        raw_spin_unlock_irqrestore(&timekeeper_lock, flags);
 
+       if (tai != orig_tai)
+               clock_was_set();
+
        ntp_notify_cmos_timer();
 
        return ret;
@@ -1742,4 +1744,5 @@ void xtime_update(unsigned long ticks)
        write_seqlock(&jiffies_lock);
        do_timer(ticks);
        write_sequnlock(&jiffies_lock);
+       update_wall_time();
 }