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Diffstat (limited to 'kernel/cpu')
-rw-r--r--kernel/cpu/idle.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/kernel/cpu/idle.c b/kernel/cpu/idle.c
index e695c0a..988573a 100644
--- a/kernel/cpu/idle.c
+++ b/kernel/cpu/idle.c
@@ -44,7 +44,7 @@ static inline int cpu_idle_poll(void)
rcu_idle_enter();
trace_cpu_idle_rcuidle(0, smp_processor_id());
local_irq_enable();
- while (!need_resched())
+ while (!tif_need_resched())
cpu_relax();
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
rcu_idle_exit();
@@ -92,8 +92,7 @@ static void cpu_idle_loop(void)
if (cpu_idle_force_poll || tick_check_broadcast_expired()) {
cpu_idle_poll();
} else {
- current_clr_polling();
- if (!need_resched()) {
+ if (!current_clr_polling_and_test()) {
stop_critical_timings();
rcu_idle_enter();
arch_cpu_idle();
@@ -103,9 +102,16 @@ static void cpu_idle_loop(void)
} else {
local_irq_enable();
}
- current_set_polling();
+ __current_set_polling();
}
arch_cpu_idle_exit();
+ /*
+ * We need to test and propagate the TIF_NEED_RESCHED
+ * bit here because we might not have send the
+ * reschedule IPI to idle tasks.
+ */
+ if (tif_need_resched())
+ set_preempt_need_resched();
}
tick_nohz_idle_exit();
schedule_preempt_disabled();
@@ -129,7 +135,7 @@ void cpu_startup_entry(enum cpuhp_state state)
*/
boot_init_stack_canary();
#endif
- current_set_polling();
+ __current_set_polling();
arch_cpu_idle_prepare();
cpu_idle_loop();
}