Merge tag 'pinctrl-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...

[mirror_ubuntu-zesty-kernel.git] / kernel / sched / idle.c

diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 4d207d2abcbd9d3d613c1035d5c436fcd08b3a14..deef1caa94c6779ea13e48690ffc2d9de2e7dddc 100644 (file)
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -209,6 +209,8 @@ use_default:
        goto exit_idle;
 }
 
+DEFINE_PER_CPU(bool, cpu_dead_idle);
+
 /*
  * Generic idle loop implementation
  *
@@ -233,8 +235,13 @@ static void cpu_idle_loop(void)
                        check_pgt_cache();
                        rmb();
 
-                       if (cpu_is_offline(smp_processor_id()))
+                       if (cpu_is_offline(smp_processor_id())) {
+                               rcu_cpu_notify(NULL, CPU_DYING_IDLE,
+                                              (void *)(long)smp_processor_id());
+                               smp_mb(); /* all activity before dead. */
+                               this_cpu_write(cpu_dead_idle, true);
                                arch_cpu_idle_dead();
+                       }
 
                        local_irq_disable();
                        arch_cpu_idle_enter();