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sched: Cure nr_iowait_cpu() users

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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 <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Sergey Senozhatsky <[email protected]>
Cc: Rafael J. Wysocki <[email protected]>
Cc: Maxim Levitsky <[email protected]>
Cc: Len Brown <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: [email protected]
LKML-Reference: <1277968037.1868.120.camel@laptop>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Peter Zijlstra 2010-07-01 09:07:17 +02:00 • committed by Ingo Molnar
commit 8c215bd389
4 changed files with 13 additions and 13 deletions
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4
kernel/sched.c
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@ -2864,9 +2864,9 @@ unsigned long nr_iowait(void)
return sum;
}
unsigned long nr_iowait_cpu(void)
unsigned long nr_iowait_cpu(int cpu)
{
struct rq *this = this_rq();
struct rq *this = cpu_rq(cpu);
return atomic_read(&this->nr_iowait);
}