---

yaml
---
r: 163084
b: refs/heads/master
c: 54a6bc0
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e6c733050faa93ce616bfedccd279ab12cffdd7b
+refs/heads/master: 54a6bc0b071c50150bc6d1da16c2cd9a963e288c

trunk/kernel/time/clocksource.c

@@ -121,6 +121,7 @@ static struct clocksource *curr_clocksource;
 static LIST_HEAD(clocksource_list);
 static DEFINE_MUTEX(clocksource_mutex);
 static char override_name[32];
+static int finished_booting;
 
 #ifdef CONFIG_CLOCKSOURCE_WATCHDOG
 static void clocksource_watchdog_work(struct work_struct *work);
@@ -155,7 +156,8 @@ static void __clocksource_unstable(struct clocksource *cs)
 {
 	cs->flags &= ~(CLOCK_SOURCE_VALID_FOR_HRES | CLOCK_SOURCE_WATCHDOG);
 	cs->flags |= CLOCK_SOURCE_UNSTABLE;
-	schedule_work(&watchdog_work);
+	if (finished_booting)
+		schedule_work(&watchdog_work);
 }
 
 static void clocksource_unstable(struct clocksource *cs, int64_t delta)
@@ -207,7 +209,8 @@ static void clocksource_watchdog(unsigned long data)
 
 		/* Clocksource already marked unstable? */
 		if (cs->flags & CLOCK_SOURCE_UNSTABLE) {
-			schedule_work(&watchdog_work);
+			if (finished_booting)
+				schedule_work(&watchdog_work);
 			continue;
 		}
 
@@ -380,6 +383,7 @@ static void clocksource_enqueue_watchdog(struct clocksource *cs)
 
 static inline void clocksource_dequeue_watchdog(struct clocksource *cs) { }
 static inline void clocksource_resume_watchdog(void) { }
+static inline int clocksource_watchdog_kthread(void *data) { return 0; }
 
 #endif /* CONFIG_CLOCKSOURCE_WATCHDOG */
 
@@ -415,8 +419,6 @@ void clocksource_touch_watchdog(void)
 
 #ifdef CONFIG_GENERIC_TIME
 
-static int finished_booting;
-
 /**
  * clocksource_select - Select the best clocksource available
  *
@@ -461,6 +463,12 @@ static void clocksource_select(void)
 	}
 }
 
+#else /* CONFIG_GENERIC_TIME */
+
+static inline void clocksource_select(void) { }
+
+#endif
+
 /*
  * clocksource_done_booting - Called near the end of core bootup
  *
@@ -471,19 +479,19 @@ static void clocksource_select(void)
 static int __init clocksource_done_booting(void)
 {
 	finished_booting = 1;
+
+	/*
+	 * Run the watchdog first to eliminate unstable clock sources
+	 */
+	clocksource_watchdog_kthread(NULL);
+
 	mutex_lock(&clocksource_mutex);
 	clocksource_select();
 	mutex_unlock(&clocksource_mutex);
 	return 0;
 }
 fs_initcall(clocksource_done_booting);
 
-#else /* CONFIG_GENERIC_TIME */
-
-static inline void clocksource_select(void) { }
-
-#endif
-
 /*
  * Enqueue the clocksource sorted by rating
  */