Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...

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

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 3ee4d06c6fc20bda08fa052a1c42d70c7d094cb8..383319bae3f7d0d9e8154a3bb99798a477ee676f 100644 (file)
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -722,17 +722,20 @@ static int hrtimer_switch_to_hres(void)
        return 1;
 }
 
+static void clock_was_set_work(struct work_struct *work)
+{
+       clock_was_set();
+}
+
+static DECLARE_WORK(hrtimer_work, clock_was_set_work);
+
 /*
- * Called from timekeeping code to reprogramm the hrtimer interrupt
- * device. If called from the timer interrupt context we defer it to
- * softirq context.
+ * Called from timekeeping and resume code to reprogramm the hrtimer
+ * interrupt device on all cpus.
  */
 void clock_was_set_delayed(void)
 {
-       struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
-
-       cpu_base->clock_was_set = 1;
-       __raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+       schedule_work(&hrtimer_work);
 }
 
 #else
@@ -774,15 +777,19 @@ void clock_was_set(void)
 
 /*
  * During resume we might have to reprogram the high resolution timer
- * interrupt (on the local CPU):
+ * interrupt on all online CPUs.  However, all other CPUs will be
+ * stopped with IRQs interrupts disabled so the clock_was_set() call
+ * must be deferred.
  */
 void hrtimers_resume(void)
 {
        WARN_ONCE(!irqs_disabled(),
                  KERN_INFO "hrtimers_resume() called with IRQs enabled!");
 
+       /* Retrigger on the local CPU */
        retrigger_next_event(NULL);
-       timerfd_clock_was_set();
+       /* And schedule a retrigger for all others */
+       clock_was_set_delayed();
 }
 
 static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
@@ -1433,13 +1440,6 @@ void hrtimer_peek_ahead_timers(void)
 
 static void run_hrtimer_softirq(struct softirq_action *h)
 {
-       struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
-
-       if (cpu_base->clock_was_set) {
-               cpu_base->clock_was_set = 0;
-               clock_was_set();
-       }
-
        hrtimer_peek_ahead_timers();
 }
 
@@ -1659,7 +1659,7 @@ SYSCALL_DEFINE2(nanosleep, struct timespec __user *, rqtp,
 /*
  * Functions related to boot-time initialization:
  */
-static void __cpuinit init_hrtimers_cpu(int cpu)
+static void init_hrtimers_cpu(int cpu)
 {
        struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu);
        int i;
@@ -1740,7 +1740,7 @@ static void migrate_hrtimers(int scpu)
 
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int __cpuinit hrtimer_cpu_notify(struct notifier_block *self,
+static int hrtimer_cpu_notify(struct notifier_block *self,
                                        unsigned long action, void *hcpu)
 {
        int scpu = (long)hcpu;
@@ -1773,7 +1773,7 @@ static int __cpuinit hrtimer_cpu_notify(struct notifier_block *self,
        return NOTIFY_OK;
 }
 
-static struct notifier_block __cpuinitdata hrtimers_nb = {
+static struct notifier_block hrtimers_nb = {
        .notifier_call = hrtimer_cpu_notify,
 };