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Subject[PATCH next] rcu: stop spurious warnings from synchronize_sched_expedited
synchronize_sched_expedited() is spamming CONFIG_DEBUG_PREEMPT=y
users with an unintended warning from the cpu_is_offline() check:
use raw_smp_processor_id() instead of smp_processor_id() there.

Signed-off-by: Hugh Dickins <hughd@google.com>
---

kernel/rcutree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- next/kernel/rcutree.c 2012-02-17 08:02:15.680065066 -0800
+++ linux/kernel/rcutree.c 2012-02-17 10:41:18.764003566 -0800
@@ -2014,7 +2014,7 @@ void synchronize_sched_expedited(void)
/* Note that atomic_inc_return() implies full memory barrier. */
firstsnap = snap = atomic_inc_return(&sync_sched_expedited_started);
get_online_cpus();
- WARN_ON_ONCE(cpu_is_offline(smp_processor_id()));
+ WARN_ON_ONCE(cpu_is_offline(raw_smp_processor_id()));

/*
* Each pass through the following loop attempts to force a

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