Revert "nohz: Make tick_nohz_irq_exit() irq safe"

This reverts commit 351429b2e62b6545bb10c756686393f29ba268a1. The
extra local_irq_save() is not longer needed as the call site now
always calls with interrupts disabled.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linuxfoundation.org>

1 files changed, 1 insertions, 6 deletions

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 520592ab6aa4..314b9ee07edf 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -565,19 +565,14 @@ void tick_nohz_idle_enter(void)
  */
 void tick_nohz_irq_exit(void)
 {
-        unsigned long flags;
         struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
 
         if (!ts->inidle)
                 return;
 
-        local_irq_save(flags);
-
-        /* Cancel the timer because CPU already waken up from the C-states */
+        /* Cancel the timer because CPU already waken up from the C-states*/
         menu_hrtimer_cancel();
         __tick_nohz_idle_enter(ts);
-
-        local_irq_restore(flags);
 }
 
 /**