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-rw-r--r--kernel/sched/idle.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 31231925f1..6135fbe83d 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -81,6 +81,25 @@ void __weak arch_cpu_idle(void)
cpu_idle_force_poll = 1;
}
+#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST_IDLE
+DEFINE_STATIC_KEY_FALSE(arch_needs_tick_broadcast);
+
+static inline void cond_tick_broadcast_enter(void)
+{
+ if (static_branch_unlikely(&arch_needs_tick_broadcast))
+ tick_broadcast_enter();
+}
+
+static inline void cond_tick_broadcast_exit(void)
+{
+ if (static_branch_unlikely(&arch_needs_tick_broadcast))
+ tick_broadcast_exit();
+}
+#else
+static inline void cond_tick_broadcast_enter(void) { }
+static inline void cond_tick_broadcast_exit(void) { }
+#endif
+
/**
* default_idle_call - Default CPU idle routine.
*
@@ -90,6 +109,7 @@ void __cpuidle default_idle_call(void)
{
instrumentation_begin();
if (!current_clr_polling_and_test()) {
+ cond_tick_broadcast_enter();
trace_cpu_idle(1, smp_processor_id());
stop_critical_timings();
@@ -99,6 +119,7 @@ void __cpuidle default_idle_call(void)
start_critical_timings();
trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
+ cond_tick_broadcast_exit();
}
local_irq_enable();
instrumentation_end();
@@ -291,7 +312,6 @@ static void do_idle(void)
local_irq_disable();
if (cpu_is_offline(cpu)) {
- tick_nohz_idle_stop_tick();
cpuhp_report_idle_dead();
arch_cpu_idle_dead();
}