rcu: Enable stall warnings for synchronize_rcu_expedited()

This commit redirects synchronize_rcu_expedited()'s wait to
synchronize_sched_expedited_wait(), thus enabling RCU CPU
stall warnings.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 7b61cec..ffeb99e 100644 (file)
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -761,8 +761,7 @@ void synchronize_rcu_expedited(void)
 
        /* Wait for snapshotted ->blkd_tasks lists to drain. */
        rnp = rcu_get_root(rsp);
-       wait_event(rsp->expedited_wq,
-                  sync_rcu_preempt_exp_done(rnp));
+       synchronize_sched_expedited_wait(rsp);
 
        /* Clean up and exit. */
        rcu_exp_gp_seq_end(rsp);