---

yaml --- r: 108211 b: refs/heads/master c: c1955a3 h: refs/heads/master i: 108209: 94ef5ec 108207: d6b1589 v: v3
git-mirror · Aug 11, 2008 · 80cd875 · 80cd875
1 parent 7c7126a
commit 80cd875
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Showing 3 changed files with 21 additions and 14 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4a273f209cc95d148f79b4c96d3d03997b44ffda
+refs/heads/master: c1955a3d4762e7a9bf84035eb3c4886a900f0d15
diff --git a/trunk/include/linux/sched.h b/trunk/include/linux/sched.h
@@ -1551,16 +1551,10 @@ static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
 
 extern unsigned long long sched_clock(void);
 
-#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
-static inline void sched_clock_init(void)
-{
-}
-
-static inline u64 sched_clock_cpu(int cpu)
-{
-	return sched_clock();
-}
+extern void sched_clock_init(void);
+extern u64 sched_clock_cpu(int cpu);
 
+#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
 static inline void sched_clock_tick(void)
 {
 }
@@ -1573,8 +1567,6 @@ static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
 {
 }
 #else
-extern void sched_clock_init(void);
-extern u64 sched_clock_cpu(int cpu);
 extern void sched_clock_tick(void);
 extern void sched_clock_idle_sleep_event(void);
 extern void sched_clock_idle_wakeup_event(u64 delta_ns);

diff --git a/trunk/kernel/sched_clock.c b/trunk/kernel/sched_clock.c
@@ -42,6 +42,8 @@ unsigned long long __attribute__((weak)) sched_clock(void)
 	return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ);
 }
 
+static __read_mostly int sched_clock_running;
+
 #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
 
 struct sched_clock_data {
@@ -70,8 +72,6 @@ static inline struct sched_clock_data *cpu_sdc(int cpu)
 	return &per_cpu(sched_clock_data, cpu);
 }
 
-static __read_mostly int sched_clock_running;
-
 void sched_clock_init(void)
 {
 	u64 ktime_now = ktime_to_ns(ktime_get());
@@ -248,6 +248,21 @@ void sched_clock_idle_wakeup_event(u64 delta_ns)
 }
 EXPORT_SYMBOL_GPL(sched_clock_idle_wakeup_event);
 
+#else /* CONFIG_HAVE_UNSTABLE_SCHED_CLOCK */
+
+void sched_clock_init(void)
+{
+	sched_clock_running = 1;
+}
+
+u64 sched_clock_cpu(int cpu)
+{
+	if (unlikely(!sched_clock_running))
+		return 0;
+
+	return sched_clock();
+}
+
 #endif
 
 unsigned long long cpu_clock(int cpu)