sched: Cure nr_iowait_cpu() users

Commit 0224cf4c5e (sched: Intoduce get_cpu_iowait_time_us())
broke things by not making sure preemption was indeed disabled
by the callers of nr_iowait_cpu() which took the iowait value of
the current cpu.

This resulted in a heap of preempt warnings. Cure this by making
nr_iowait_cpu() take a cpu number and fix up the callers to pass
in the right number.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: linux-pm@lists.linux-foundation.org
LKML-Reference: <1277968037.1868.120.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index 52ff8aa63f84..1b128702d300 100644
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -143,7 +143,7 @@ static inline int which_bucket(unsigned int duration)
          * This allows us to calculate
          * E(duration)|iowait
          */
-        if (nr_iowait_cpu())
+        if (nr_iowait_cpu(smp_processor_id()))
                 bucket = BUCKETS/2;
 
         if (duration < 10)
@@ -175,7 +175,7 @@ static inline int performance_multiplier(void)
         mult += 2 * get_loadavg();
 
         /* for IO wait tasks (per cpu!) we add 5x each */
-        mult += 10 * nr_iowait_cpu();
+        mult += 10 * nr_iowait_cpu(smp_processor_id());
 
         return mult;
 }