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-rw-r--r--kernel/time/clocksource.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index cabfa193efb3..edd5ef8e1765 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -142,8 +142,13 @@ static void clocksource_watchdog(unsigned long data)
}
if (!list_empty(&watchdog_list)) {
- __mod_timer(&watchdog_timer,
- watchdog_timer.expires + WATCHDOG_INTERVAL);
+ /* Cycle through CPUs to check if the CPUs stay synchronized to
+ * each other. */
+ int next_cpu = next_cpu(raw_smp_processor_id(), cpu_online_map);
+ if (next_cpu >= NR_CPUS)
+ next_cpu = first_cpu(cpu_online_map);
+ watchdog_timer.expires += WATCHDOG_INTERVAL;
+ add_timer_on(&watchdog_timer, next_cpu);
}
spin_unlock(&watchdog_lock);
}
@@ -165,7 +170,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
if (!started && watchdog) {
watchdog_last = watchdog->read();
watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL;
- add_timer(&watchdog_timer);
+ add_timer_on(&watchdog_timer, first_cpu(cpu_online_map));
}
} else {
if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
@@ -186,7 +191,8 @@ static void clocksource_check_watchdog(struct clocksource *cs)
watchdog_last = watchdog->read();
watchdog_timer.expires =
jiffies + WATCHDOG_INTERVAL;
- add_timer(&watchdog_timer);
+ add_timer_on(&watchdog_timer,
+ first_cpu(cpu_online_map));
}
}
}