qib_fs: fix (some) dcache abuses

[firefly-linux-kernel-4.4.55.git] / drivers / acpi / processor_idle.c

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f98dd00b51a94b2d7e2d7dc9cd15f3e941e81bff..c7414a545a4f402506468c0e1d73aa160e55e836 100644 (file)
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -119,17 +119,10 @@ static struct dmi_system_id processor_power_dmi_table[] = {
  */
 static void acpi_safe_halt(void)
 {
-       current_thread_info()->status &= ~TS_POLLING;
-       /*
-        * TS_POLLING-cleared state must be visible before we
-        * test NEED_RESCHED:
-        */
-       smp_mb();
-       if (!need_resched()) {
+       if (!tif_need_resched()) {
                safe_halt();
                local_irq_disable();
        }
-       current_thread_info()->status |= TS_POLLING;
 }
 
 #ifdef ARCH_APICTIMER_STOPS_ON_C3
@@ -737,6 +730,11 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
        if (unlikely(!pr))
                return -EINVAL;
 
+       if (cx->entry_method == ACPI_CSTATE_FFH) {
+               if (current_set_polling_and_test())
+                       return -EINVAL;
+       }
+
        lapic_timer_state_broadcast(pr, cx, 1);
        acpi_idle_do_entry(cx);
 
@@ -790,18 +788,9 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
        if (unlikely(!pr))
                return -EINVAL;
 
-       if (cx->entry_method != ACPI_CSTATE_FFH) {
-               current_thread_info()->status &= ~TS_POLLING;
-               /*
-                * TS_POLLING-cleared state must be visible before we test
-                * NEED_RESCHED:
-                */
-               smp_mb();
-
-               if (unlikely(need_resched())) {
-                       current_thread_info()->status |= TS_POLLING;
+       if (cx->entry_method == ACPI_CSTATE_FFH) {
+               if (current_set_polling_and_test())
                        return -EINVAL;
-               }
        }
 
        /*
@@ -819,9 +808,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
 
        sched_clock_idle_wakeup_event(0);
 
-       if (cx->entry_method != ACPI_CSTATE_FFH)
-               current_thread_info()->status |= TS_POLLING;
-
        lapic_timer_state_broadcast(pr, cx, 0);
        return index;
 }
@@ -858,18 +844,9 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
                }
        }
 
-       if (cx->entry_method != ACPI_CSTATE_FFH) {
-               current_thread_info()->status &= ~TS_POLLING;
-               /*
-                * TS_POLLING-cleared state must be visible before we test
-                * NEED_RESCHED:
-                */
-               smp_mb();
-
-               if (unlikely(need_resched())) {
-                       current_thread_info()->status |= TS_POLLING;
+       if (cx->entry_method == ACPI_CSTATE_FFH) {
+               if (current_set_polling_and_test())
                        return -EINVAL;
-               }
        }
 
        acpi_unlazy_tlb(smp_processor_id());
@@ -915,9 +892,6 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
 
        sched_clock_idle_wakeup_event(0);
 
-       if (cx->entry_method != ACPI_CSTATE_FFH)
-               current_thread_info()->status |= TS_POLLING;
-
        lapic_timer_state_broadcast(pr, cx, 0);
        return index;
 }