debug_rcu_head_queue
if (debug_rcu_head_queue(rhp)) {
debug_rcu_head_queue(&sdp->srcu_barrier_head);
if (debug_rcu_head_queue(head)) {
if (debug_rcu_head_queue(head)) {
debug_rcu_head_queue(&rdp->barrier_head);
if (debug_rcu_head_queue(ptr)) {