Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer/dynticks updates from Ingo Molnar:
 "This tree contains misc dynticks updates: a fix and three cleanups"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/nohz: Fix overflow error in scheduler_tick_max_deferment()
  nohz_full: fix code style issue of tick_nohz_full_stop_tick
  nohz: Get timekeeping max deferment outside jiffies_lock
  tick: Rename tick_check_idle() to tick_irq_enter()

3 files changed, 16 insertions, 15 deletions

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 656cd70eb577..b46131ef6aab 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2476,7 +2476,7 @@ u64 scheduler_tick_max_deferment(void)
         if (time_before_eq(next, now))
                 return 0;
 
-        return jiffies_to_usecs(next - now) * NSEC_PER_USEC;
+        return jiffies_to_nsecs(next - now);
 }
 #endif
 
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 850967068aaf..490fcbb1dc5b 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -328,7 +328,7 @@ void irq_enter(void)
                  * here, as softirq will be serviced on return from interrupt.
                  */
                 local_bh_disable();
-                tick_check_idle();
+                tick_irq_enter();
                 _local_bh_enable();
         }
 
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 08cb0c3b8ccb..9f8af69c67ec 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -533,12 +533,13 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
         struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
         u64 time_delta;
 
+        time_delta = timekeeping_max_deferment();
+
         /* Read jiffies and the time when jiffies were updated last */
         do {
                 seq = read_seqbegin(&jiffies_lock);
                 last_update = last_jiffies_update;
                 last_jiffies = jiffies;
-                time_delta = timekeeping_max_deferment();
         } while (read_seqretry(&jiffies_lock, seq));
 
         if (rcu_needs_cpu(cpu, &rcu_delta_jiffies) ||
@@ -678,18 +679,18 @@ out:
 static void tick_nohz_full_stop_tick(struct tick_sched *ts)
 {
 #ifdef CONFIG_NO_HZ_FULL
-       int cpu = smp_processor_id();
+        int cpu = smp_processor_id();
 
-       if (!tick_nohz_full_cpu(cpu) || is_idle_task(current))
-               return;
+        if (!tick_nohz_full_cpu(cpu) || is_idle_task(current))
+                return;
 
-       if (!ts->tick_stopped && ts->nohz_mode == NOHZ_MODE_INACTIVE)
-               return;
+        if (!ts->tick_stopped && ts->nohz_mode == NOHZ_MODE_INACTIVE)
+                return;
 
-       if (!can_stop_full_tick())
-               return;
+        if (!can_stop_full_tick())
+                return;
 
-       tick_nohz_stop_sched_tick(ts, ktime_get(), cpu);
+        tick_nohz_stop_sched_tick(ts, ktime_get(), cpu);
 #endif
 }
 
@@ -1023,7 +1024,7 @@ static void tick_nohz_kick_tick(struct tick_sched *ts, ktime_t now)
 #endif
 }
 
-static inline void tick_check_nohz_this_cpu(void)
+static inline void tick_nohz_irq_enter(void)
 {
         struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
         ktime_t now;
@@ -1042,17 +1043,17 @@ static inline void tick_check_nohz_this_cpu(void)
 #else
 
 static inline void tick_nohz_switch_to_nohz(void) { }
-static inline void tick_check_nohz_this_cpu(void) { }
+static inline void tick_nohz_irq_enter(void) { }
 
 #endif /* CONFIG_NO_HZ_COMMON */
 
 /*
  * Called from irq_enter to notify about the possible interruption of idle()
  */
-void tick_check_idle(void)
+void tick_irq_enter(void)
 {
         tick_check_oneshot_broadcast_this_cpu();
-        tick_check_nohz_this_cpu();
+        tick_nohz_irq_enter();
 }
 
 /*