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Subject[PATCH 6/8] acpi_pad: uses MONITOR/MWAIT, so it doesn't need to clear TS_POLLING
Date
From: Len Brown <len.brown@intel.com>

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>
---
drivers/acpi/acpi_pad.c | 9 ---------
1 files changed, 0 insertions(+), 9 deletions(-)

diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c
index 6212213..7edf053 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
--
1.6.0.6


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