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authorLen Brown <len.brown@intel.com>2010-05-24 11:41:00 -0400
committerLen Brown <len.brown@intel.com>2010-05-27 21:07:06 -0400
commita7d27c37533524e23bbdc9ba1d78e3241b7483ea (patch)
tree9a9e08b7341c358b039059abfab420c06d0416d1
parente45b7fa23097332508730123ac6d59227e7bd7f8 (diff)
downloadop-kernel-dev-a7d27c37533524e23bbdc9ba1d78e3241b7483ea.zip
op-kernel-dev-a7d27c37533524e23bbdc9ba1d78e3241b7483ea.tar.gz
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>
-rw-r--r--drivers/acpi/acpi_pad.c9
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
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