acpi_pad: uses MONITOR/MWAIT, so it doesn't need to clear TS_POLLING

api_pad exclusively uses MONITOR/MWAIT to sleep in idle,
so it does not need the wakeup IPI during idle sleep
that is provoked by clearing TS_POLLING.

Signed-off-by: Len Brown <len.brown@intel.com>
Cc: Shaohua Li <shaohua.li@intel.com>

1 files changed, 0 insertions, 9 deletions

diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 62122134693..7edf053983c 100644
--- a/drivers/acpi/acpi_pad.c
+++ b/drivers/acpi/acpi_pad.c
@@ -168,13 +168,6 @@ static int power_saving_thread(void *data)
 
                 do_sleep = 0;
 
-                current_thread_info()->status &= ~TS_POLLING;
-                /*
-                 * TS_POLLING-cleared state must be visible before we test
-                 * NEED_RESCHED:
-                 */
-                smp_mb();
-
                 expire_time = jiffies + HZ * (100 - idle_pct) / 100;
 
                 while (!need_resched()) {
@@ -200,8 +193,6 @@ static int power_saving_thread(void *data)
                         }
                 }
 
-                current_thread_info()->status |= TS_POLLING;
-
                 /*
                  * current sched_rt has threshold for rt task running time.
                  * When a rt task uses 95% CPU time, the rt thread will be