timers: Improve get_next_timer_interrupt()

[karo-tx-linux.git] / kernel / timer.c

diff --git a/kernel/timer.c b/kernel/timer.c
index 7fada698bd1a54d015ae7a14fc4badb54cf7d624..a61c09374ebab1fdba0bdd370b56cf70018de62d 100644 (file)
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1326,18 +1326,21 @@ static unsigned long cmp_next_hrtimer_event(unsigned long now,
 unsigned long get_next_timer_interrupt(unsigned long now)
 {
        struct tvec_base *base = __this_cpu_read(tvec_bases);
-       unsigned long expires;
+       unsigned long expires = now + NEXT_TIMER_MAX_DELTA;
 
        /*
         * Pretend that there is no timer pending if the cpu is offline.
         * Possible pending timers will be migrated later to an active cpu.
         */
        if (cpu_is_offline(smp_processor_id()))
-               return now + NEXT_TIMER_MAX_DELTA;
+               return expires;
+
        spin_lock(&base->lock);
-       if (time_before_eq(base->next_timer, base->timer_jiffies))
-               base->next_timer = __next_timer_interrupt(base);
-       expires = base->next_timer;
+       if (base->active_timers) {
+               if (time_before_eq(base->next_timer, base->timer_jiffies))
+                       base->next_timer = __next_timer_interrupt(base);
+               expires = base->next_timer;
+       }
        spin_unlock(&base->lock);
 
        if (time_before_eq(expires, now))