sched, rcu: Fix rcu_dereference() for RCU-lockdep

Make rcu_dereference() of runqueue data structures be
rcu_dereference_sched().

Located-by: Ingo Molnar <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
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LKML-Reference: <20100228163218[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 3e1fd96c6cf9cef8de27f7ba41dad905986f1959..5a5ea2cd924fa8494abfa21f8203f919f40ff1ca 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -3476,7 +3476,7 @@ static void run_rebalance_domains(struct softirq_action *h)
 
 static inline int on_null_domain(int cpu)
 {
-       return !rcu_dereference(cpu_rq(cpu)->sd);
+       return !rcu_dereference_sched(cpu_rq(cpu)->sd);
 }
 
 /*