From: Len Brown Date: Mon, 24 May 2010 15:41:00 +0000 (-0400) Subject: acpi_pad: uses MONITOR/MWAIT, so it doesn't need to clear TS_POLLING X-Git-Tag: v3.12-rc1~8933^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a7d27c37533524e23bbdc9ba1d78e3241b7483ea;p=kernel%2Fkernel-generic.git 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 Cc: Shaohua Li --- 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