[PATCH tip/core/rcu 19/22] EXP: rcu: Add debugging info to other assertion

[Paul E. McKenney]

Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
---
 kernel/rcu/tree_plugin.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index cdfd39f58368..0dbf813f371b 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -697,7 +697,8 @@ static void rcu_preempt_check_blocked_tasks(struct rcu_node 
*rnp)
        struct task_struct *t;
 
        RCU_LOCKDEP_WARN(preemptible(), "rcu_preempt_check_blocked_tasks() 
invoked with preemption enabled!!!\n");
-       WARN_ON_ONCE(rcu_preempt_blocked_readers_cgp(rnp));
+       if (WARN_ON_ONCE(rcu_preempt_blocked_readers_cgp(rnp)))
+               dump_blkd_tasks(rnp, 10);
        if (rcu_preempt_has_tasks(rnp)) {
                rnp->gp_tasks = rnp->blkd_tasks.next;
                t = container_of(rnp->gp_tasks, struct task_struct,
-- 
2.5.2