tick/timekeeping: Call update_wall_time outside the jiffies lock

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

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index d62682b6df4a57c3d4b024feaa1f764174851fa1..44b7e6bb081b7381e9031bb8d4a769a5813499a5 100644 (file)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1360,7 +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;
@@ -1441,19 +1441,8 @@ static void update_wall_time(void)
        write_seqcount_end(&timekeeper_seq);
 out:
        raw_spin_unlock_irqrestore(&timekeeper_lock, flags);
-       if (clock_was_set) {
-               /*
-                * XXX -  I'd rather we just call clock_was_set(), but
-                * since we're currently holding the jiffies lock, calling
-                * clock_was_set would trigger an ipi which would then grab
-                * the jiffies lock and we'd deadlock. :(
-                * The right solution should probably be droping
-                * the jiffies lock before calling update_wall_time
-                * but that requires some rework of the tick sched
-                * code.
-                */
-               clock_was_set_delayed();
-       }
+       if (clock_set)
+               clock_was_set();
 }
 
 /**
@@ -1598,7 +1587,6 @@ struct timespec get_monotonic_coarse(void)
 void do_timer(unsigned long ticks)
 {
        jiffies_64 += ticks;
-       update_wall_time();
        calc_global_load(ticks);
 }
 
@@ -1756,4 +1744,5 @@ void xtime_update(unsigned long ticks)
        write_seqlock(&jiffies_lock);
        do_timer(ticks);
        write_sequnlock(&jiffies_lock);
+       update_wall_time();
 }