Merge branch 'linus' into timers/urgent

Get upstream changes so we can apply fixes against them

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 18 insertions, 17 deletions

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index fd4b13b131f8..f0f4fe29cd21 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -47,6 +47,7 @@
 #include <linux/sched/sysctl.h>
 #include <linux/sched/rt.h>
 #include <linux/timer.h>
+#include <linux/freezer.h>
 
 #include <asm/uaccess.h>
 
@@ -721,17 +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
@@ -773,15 +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)
@@ -1432,13 +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();
 }
 
@@ -1545,7 +1546,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
                         t->task = NULL;
 
                 if (likely(t->task))
-                        schedule();
+                        freezable_schedule();
 
                 hrtimer_cancel(&t->timer);
                 mode = HRTIMER_MODE_ABS;