215 	struct rcu_node *rnp;  in rcu_iw_handler()  local
218 	rnp = rdp->mynode;  in rcu_iw_handler()
219 	raw_spin_lock_rcu_node(rnp);  in rcu_iw_handler()
221 		rdp->rcu_iw_gp_seq = rnp->gp_seq;  in rcu_iw_handler()
224 	raw_spin_unlock_rcu_node(rnp);  in rcu_iw_handler()
237 static void rcu_print_detail_task_stall_rnp(struct rcu_node *rnp)  in rcu_print_detail_task_stall_rnp()  argument
242 	raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_print_detail_task_stall_rnp()
243 	if (!rcu_preempt_blocked_readers_cgp(rnp)) {  in rcu_print_detail_task_stall_rnp()
244 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_detail_task_stall_rnp()
247 	t = list_entry(rnp->gp_tasks->prev,  in rcu_print_detail_task_stall_rnp()
249 	list_for_each_entry_continue(t, &rnp->blkd_tasks, rcu_node_entry) {  in rcu_print_detail_task_stall_rnp()
257 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_detail_task_stall_rnp()
287 static int rcu_print_task_stall(struct rcu_node *rnp, unsigned long flags)  in rcu_print_task_stall()  argument
288 	__releases(rnp->lock)  in rcu_print_task_stall()
297 	if (!rcu_preempt_blocked_readers_cgp(rnp)) {  in rcu_print_task_stall()
298 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_task_stall()
302 	       rnp->level, rnp->grplo, rnp->grphi);  in rcu_print_task_stall()
303 	t = list_entry(rnp->gp_tasks->prev,  in rcu_print_task_stall()
305 	list_for_each_entry_continue(t, &rnp->blkd_tasks, rcu_node_entry) {  in rcu_print_task_stall()
311 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_task_stall()
337 static void rcu_print_detail_task_stall_rnp(struct rcu_node *rnp)  in rcu_print_detail_task_stall_rnp()  argument
345 static int rcu_print_task_stall(struct rcu_node *rnp, unsigned long flags)  in rcu_print_task_stall()  argument
346 	__releases(rnp->lock)  in rcu_print_task_stall()
348 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_print_task_stall()
363 	struct rcu_node *rnp;  in rcu_dump_cpu_stacks()  local
365 	rcu_for_each_leaf_node(rnp) {  in rcu_dump_cpu_stacks()
366 		raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_dump_cpu_stacks()
367 		for_each_leaf_node_possible_cpu(rnp, cpu)  in rcu_dump_cpu_stacks()
368 			if (rnp->qsmask & leaf_node_cpu_bit(rnp, cpu)) {  in rcu_dump_cpu_stacks()
374 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_dump_cpu_stacks()
590 	struct rcu_node *rnp;  in print_other_cpu_stall()  local
607 	rcu_for_each_leaf_node(rnp) {  in print_other_cpu_stall()
608 		raw_spin_lock_irqsave_rcu_node(rnp, flags);  in print_other_cpu_stall()
609 		if (rnp->qsmask != 0) {  in print_other_cpu_stall()
610 			for_each_leaf_node_possible_cpu(rnp, cpu)  in print_other_cpu_stall()
611 				if (rnp->qsmask & leaf_node_cpu_bit(rnp, cpu)) {  in print_other_cpu_stall()
616 		ndetected += rcu_print_task_stall(rnp, flags); // Releases rnp->lock.  in print_other_cpu_stall()
629 		rcu_for_each_leaf_node(rnp)  in print_other_cpu_stall()
630 			rcu_print_detail_task_stall_rnp(rnp);  in print_other_cpu_stall()
661 	struct rcu_node *rnp = rcu_get_root();  in print_cpu_stall()  local
692 	raw_spin_lock_irqsave_rcu_node(rnp, flags);  in print_cpu_stall()
697 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in print_cpu_stall()
721 	struct rcu_node *rnp;  in check_cpu_stall()  local
759 	rnp = rdp->mynode;  in check_cpu_stall()
762 	    (READ_ONCE(rnp->qsmask) & rdp->grpmask) &&  in check_cpu_stall()
829 	struct rcu_node *rnp;  in rcu_check_boost_fail()  local
831 	rcu_for_each_leaf_node(rnp) {  in rcu_check_boost_fail()
833 			if (data_race(READ_ONCE(rnp->qsmask))) {  in rcu_check_boost_fail()
836 				if (READ_ONCE(rnp->gp_tasks))  in rcu_check_boost_fail()
842 		raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_check_boost_fail()
843 		if (rnp->gp_tasks)  in rcu_check_boost_fail()
845 		if (!rnp->qsmask) {  in rcu_check_boost_fail()
847 			raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_boost_fail()
851 		for_each_leaf_node_possible_cpu(rnp, cpu) {  in rcu_check_boost_fail()
852 			if (rnp->qsmask & (1UL << (cpu - rnp->grplo))) {  in rcu_check_boost_fail()
853 				raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_boost_fail()
858 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_boost_fail()
878 	struct rcu_node *rnp;  in show_rcu_gp_kthreads()  local
895 	rcu_for_each_node_breadth_first(rnp) {  in show_rcu_gp_kthreads()
896 		if (ULONG_CMP_GE(READ_ONCE(rcu_state.gp_seq), READ_ONCE(rnp->gp_seq_needed)) &&  in show_rcu_gp_kthreads()
897 		    !data_race(READ_ONCE(rnp->qsmask)) && !data_race(READ_ONCE(rnp->boost_tasks)) &&  in show_rcu_gp_kthreads()
898 		    !data_race(READ_ONCE(rnp->exp_tasks)) && !data_race(READ_ONCE(rnp->gp_tasks)))  in show_rcu_gp_kthreads()
901 			rnp->grplo, rnp->grphi,  in show_rcu_gp_kthreads()
902 			(long)data_race(READ_ONCE(rnp->gp_seq)),  in show_rcu_gp_kthreads()
903 			(long)data_race(READ_ONCE(rnp->gp_seq_needed)),  in show_rcu_gp_kthreads()
904 			data_race(READ_ONCE(rnp->qsmask)),  in show_rcu_gp_kthreads()
905 			".b"[!!data_race(READ_ONCE(rnp->boost_kthread_task))],  in show_rcu_gp_kthreads()
906 			".B"[!!data_race(READ_ONCE(rnp->boost_tasks))],  in show_rcu_gp_kthreads()
907 			".E"[!!data_race(READ_ONCE(rnp->exp_tasks))],  in show_rcu_gp_kthreads()
908 			".G"[!!data_race(READ_ONCE(rnp->gp_tasks))],  in show_rcu_gp_kthreads()
909 			data_race(READ_ONCE(rnp->n_boosts)));  in show_rcu_gp_kthreads()
910 		if (!rcu_is_leaf_node(rnp))  in show_rcu_gp_kthreads()
912 		for_each_leaf_node_possible_cpu(rnp, cpu) {  in show_rcu_gp_kthreads()
937 static void rcu_check_gp_start_stall(struct rcu_node *rnp, struct rcu_data *rdp,  in rcu_check_gp_start_stall()  argument
956 	raw_spin_lock_irqsave_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()
964 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()
969 	if (rnp_root != rnp)  in rcu_check_gp_start_stall()
978 		if (rnp_root != rnp)  in rcu_check_gp_start_stall()
981 		raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()
985 	if (rnp_root != rnp)  in rcu_check_gp_start_stall()
987 	raw_spin_unlock_irqrestore_rcu_node(rnp, flags);  in rcu_check_gp_start_stall()