187 	struct rcu_node *rnp;  in rcu_iw_handler()  local
190 	rnp = rdp->mynode;  in rcu_iw_handler()
191 	raw_spin_lock_rcu_node(rnp);  in rcu_iw_handler()
193 		rdp->rcu_iw_gp_seq = rnp->gp_seq;  in rcu_iw_handler()
196 	raw_spin_unlock_rcu_node(rnp);  in rcu_iw_handler()
209 static void rcu_print_detail_task_stall_rnp(struct rcu_node *rnp)  in rcu_print_detail_task_stall_rnp()  argument
214 	raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_print_detail_task_stall_rnp()
215 	if (!rcu_preempt_blocked_readers_cgp(rnp)) {  in rcu_print_detail_task_stall_rnp()
216 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_detail_task_stall_rnp()
219 	t = list_entry(rnp->gp_tasks->prev,  in rcu_print_detail_task_stall_rnp()
221 	list_for_each_entry_continue(t, &rnp->blkd_tasks, rcu_node_entry) {  in rcu_print_detail_task_stall_rnp()
229 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_detail_task_stall_rnp()
259 static int rcu_print_task_stall(struct rcu_node *rnp, unsigned long flags)  in rcu_print_task_stall()  argument
260 	__releases(rnp->lock)  in rcu_print_task_stall()
269 	if (!rcu_preempt_blocked_readers_cgp(rnp)) {  in rcu_print_task_stall()
270 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_task_stall()
274 	       rnp->level, rnp->grplo, rnp->grphi);  in rcu_print_task_stall()
275 	t = list_entry(rnp->gp_tasks->prev,  in rcu_print_task_stall()
277 	list_for_each_entry_continue(t, &rnp->blkd_tasks, rcu_node_entry) {  in rcu_print_task_stall()
283 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_task_stall()
309 static void rcu_print_detail_task_stall_rnp(struct rcu_node *rnp)  in rcu_print_detail_task_stall_rnp()  argument
317 static int rcu_print_task_stall(struct rcu_node *rnp, unsigned long flags)  in rcu_print_task_stall()  argument
318 	__releases(rnp->lock)  in rcu_print_task_stall()
320 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_task_stall()
335 	struct rcu_node *rnp;  in rcu_dump_cpu_stacks()  local
337 	rcu_for_each_leaf_node(rnp) {  in rcu_dump_cpu_stacks()
338 		raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_dump_cpu_stacks()
339 		for_each_leaf_node_possible_cpu(rnp, cpu)  in rcu_dump_cpu_stacks()
340 			if (rnp->qsmask & leaf_node_cpu_bit(rnp, cpu)) {  in rcu_dump_cpu_stacks()
346 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_dump_cpu_stacks()
527 	struct rcu_node *rnp;  in print_other_cpu_stall()  local
544 	rcu_for_each_leaf_node(rnp) {  in print_other_cpu_stall()
545 		raw_spin_lock_irqsave_rcu_node(rnp, flags);  in print_other_cpu_stall()
546 		if (rnp->qsmask != 0) {  in print_other_cpu_stall()
547 			for_each_leaf_node_possible_cpu(rnp, cpu)  in print_other_cpu_stall()
548 				if (rnp->qsmask & leaf_node_cpu_bit(rnp, cpu)) {  in print_other_cpu_stall()
553 		ndetected += rcu_print_task_stall(rnp, flags); // Releases rnp->lock.  in print_other_cpu_stall()
566 		rcu_for_each_leaf_node(rnp)  in print_other_cpu_stall()
567 			rcu_print_detail_task_stall_rnp(rnp);  in print_other_cpu_stall()
598 	struct rcu_node *rnp = rcu_get_root();  in print_cpu_stall()  local
629 	raw_spin_lock_irqsave_rcu_node(rnp, flags);  in print_cpu_stall()
634 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in print_cpu_stall()
658 	struct rcu_node *rnp;  in check_cpu_stall()  local
696 	rnp = rdp->mynode;  in check_cpu_stall()
699 	    (READ_ONCE(rnp->qsmask) & rdp->grpmask) &&  in check_cpu_stall()
766 	struct rcu_node *rnp;  in rcu_check_boost_fail()  local
768 	rcu_for_each_leaf_node(rnp) {  in rcu_check_boost_fail()
770 			if (data_race(READ_ONCE(rnp->qsmask))) {  in rcu_check_boost_fail()
773 				if (READ_ONCE(rnp->gp_tasks))  in rcu_check_boost_fail()
779 		raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_check_boost_fail()
780 		if (rnp->gp_tasks)  in rcu_check_boost_fail()
782 		if (!rnp->qsmask) {  in rcu_check_boost_fail()
784 			raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_boost_fail()
788 		for_each_leaf_node_possible_cpu(rnp, cpu) {  in rcu_check_boost_fail()
789 			if (rnp->qsmask & (1UL << (cpu - rnp->grplo))) {  in rcu_check_boost_fail()
790 				raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_boost_fail()
795 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_boost_fail()
815 	struct rcu_node *rnp;  in show_rcu_gp_kthreads()  local
832 	rcu_for_each_node_breadth_first(rnp) {  in show_rcu_gp_kthreads()
833 		if (ULONG_CMP_GE(READ_ONCE(rcu_state.gp_seq), READ_ONCE(rnp->gp_seq_needed)) &&  in show_rcu_gp_kthreads()
834 		    !data_race(READ_ONCE(rnp->qsmask)) && !data_race(READ_ONCE(rnp->boost_tasks)) &&  in show_rcu_gp_kthreads()
835 		    !data_race(READ_ONCE(rnp->exp_tasks)) && !data_race(READ_ONCE(rnp->gp_tasks)))  in show_rcu_gp_kthreads()
838 			rnp->grplo, rnp->grphi,  in show_rcu_gp_kthreads()
839 			(long)data_race(READ_ONCE(rnp->gp_seq)),  in show_rcu_gp_kthreads()
840 			(long)data_race(READ_ONCE(rnp->gp_seq_needed)),  in show_rcu_gp_kthreads()
841 			data_race(READ_ONCE(rnp->qsmask)),  in show_rcu_gp_kthreads()
842 			".b"[!!data_race(READ_ONCE(rnp->boost_kthread_task))],  in show_rcu_gp_kthreads()
843 			".B"[!!data_race(READ_ONCE(rnp->boost_tasks))],  in show_rcu_gp_kthreads()
844 			".E"[!!data_race(READ_ONCE(rnp->exp_tasks))],  in show_rcu_gp_kthreads()
845 			".G"[!!data_race(READ_ONCE(rnp->gp_tasks))],  in show_rcu_gp_kthreads()
846 			data_race(READ_ONCE(rnp->n_boosts)));  in show_rcu_gp_kthreads()
847 		if (!rcu_is_leaf_node(rnp))  in show_rcu_gp_kthreads()
849 		for_each_leaf_node_possible_cpu(rnp, cpu) {  in show_rcu_gp_kthreads()
874 static void rcu_check_gp_start_stall(struct rcu_node *rnp, struct rcu_data *rdp,  in rcu_check_gp_start_stall()  argument
893 	raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()
901 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()
906 	if (rnp_root != rnp)  in rcu_check_gp_start_stall()
915 		if (rnp_root != rnp)  in rcu_check_gp_start_stall()
918 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()
922 	if (rnp_root != rnp)  in rcu_check_gp_start_stall()
924 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()