rcu_try_lock_acquire
rcu_try_lock_acquire(&rcu_tasks_trace_srcu_struct.dep_map);
rcu_try_lock_acquire(&rcu_tasks_trace_srcu_struct.dep_map);
rcu_try_lock_acquire(&ssp->dep_map);
rcu_try_lock_acquire(&ssp->dep_map);
rcu_try_lock_acquire(&ssp->dep_map);