image/svg+xml ->qsmask &= ~->grpmask Root rcu_report_rnp() Leaf ->qsmask &= ~->grpmask Leaf Leaf Leaf ->qsmask &= ~->grpmask note_gp_changes() rdp->gp_seq __note_gp_changes() Leaf rcu_node_context_switch() rcu_check_callbacks() rcu_process_callbacks() rcu_check_quiescent_state()) rcu__report_qs_rdp()) RCU read-side critical section RCU read-side critical section RCU read-side critical section RCU read-side critical section Wake up grace-period kernel thread rcu_report_qs_rsp()