125 	struct srcu_data *sdp;  in init_srcu_struct_data()  local
131 	WARN_ON_ONCE(ARRAY_SIZE(sdp->srcu_lock_count) !=  in init_srcu_struct_data()
132 		     ARRAY_SIZE(sdp->srcu_unlock_count));  in init_srcu_struct_data()
134 		sdp = per_cpu_ptr(ssp->sda, cpu);  in init_srcu_struct_data()
135 		spin_lock_init(&ACCESS_PRIVATE(sdp, lock));  in init_srcu_struct_data()
136 		rcu_segcblist_init(&sdp->srcu_cblist);  in init_srcu_struct_data()
137 		sdp->srcu_cblist_invoking = false;  in init_srcu_struct_data()
138 		sdp->srcu_gp_seq_needed = ssp->srcu_sup->srcu_gp_seq;  in init_srcu_struct_data()
139 		sdp->srcu_gp_seq_needed_exp = ssp->srcu_sup->srcu_gp_seq;  in init_srcu_struct_data()
140 		sdp->mynode = NULL;  in init_srcu_struct_data()
141 		sdp->cpu = cpu;  in init_srcu_struct_data()
142 		INIT_WORK(&sdp->work, srcu_invoke_callbacks);  in init_srcu_struct_data()
143 		timer_setup(&sdp->delay_work, srcu_delay_timer, 0);  in init_srcu_struct_data()
144 		sdp->ssp = ssp;  in init_srcu_struct_data()
170 	struct srcu_data *sdp;  in init_srcu_struct_nodes()  local
219 		sdp = per_cpu_ptr(ssp->sda, cpu);  in init_srcu_struct_nodes()
220 		sdp->mynode = &snp_first[cpu / levelspread[level]];  in init_srcu_struct_nodes()
221 		for (snp = sdp->mynode; snp != NULL; snp = snp->srcu_parent) {  in init_srcu_struct_nodes()
226 		sdp->grpmask = 1 << (cpu - sdp->mynode->grplo);  in init_srcu_struct_nodes()
367 static void spin_lock_irqsave_sdp_contention(struct srcu_data *sdp, unsigned long *flags)  in spin_lock_irqsave_sdp_contention()  argument
369 	struct srcu_struct *ssp = sdp->ssp;  in spin_lock_irqsave_sdp_contention()
371 	if (spin_trylock_irqsave_rcu_node(sdp, *flags))  in spin_lock_irqsave_sdp_contention()
376 	spin_lock_irqsave_rcu_node(sdp, *flags);  in spin_lock_irqsave_sdp_contention()
655 		struct srcu_data *sdp = per_cpu_ptr(ssp->sda, cpu);  in cleanup_srcu_struct()  local
657 		del_timer_sync(&sdp->delay_work);  in cleanup_srcu_struct()
658 		flush_work(&sdp->work);  in cleanup_srcu_struct()
659 		if (WARN_ON(rcu_segcblist_n_cbs(&sdp->srcu_cblist)))  in cleanup_srcu_struct()
690 	struct srcu_data *sdp;  in srcu_check_nmi_safety()  local
694 	sdp = raw_cpu_ptr(ssp->sda);  in srcu_check_nmi_safety()
695 	old_nmi_safe_mask = READ_ONCE(sdp->srcu_nmi_safety);  in srcu_check_nmi_safety()
697 		WRITE_ONCE(sdp->srcu_nmi_safety, nmi_safe_mask);  in srcu_check_nmi_safety()
700 …WARN_ONCE(old_nmi_safe_mask != nmi_safe_mask, "CPU %d old state %d new state %d\n", sdp->cpu, old_…  in srcu_check_nmi_safety()
743 	struct srcu_data *sdp = raw_cpu_ptr(ssp->sda);  in __srcu_read_lock_nmisafe()  local
746 	atomic_long_inc(&sdp->srcu_lock_count[idx]);  in __srcu_read_lock_nmisafe()
759 	struct srcu_data *sdp = raw_cpu_ptr(ssp->sda);  in __srcu_read_unlock_nmisafe()  local
762 	atomic_long_inc(&sdp->srcu_unlock_count[idx]);  in __srcu_read_unlock_nmisafe()
773 	struct srcu_data *sdp;  in srcu_gp_start()  local
777 		sdp = per_cpu_ptr(ssp->sda, get_boot_cpu_id());  in srcu_gp_start()
779 		sdp = this_cpu_ptr(ssp->sda);  in srcu_gp_start()
782 	spin_lock_rcu_node(sdp);  /* Interrupts already disabled. */  in srcu_gp_start()
783 	rcu_segcblist_advance(&sdp->srcu_cblist,  in srcu_gp_start()
785 	(void)rcu_segcblist_accelerate(&sdp->srcu_cblist,  in srcu_gp_start()
787 	spin_unlock_rcu_node(sdp);  /* Interrupts remain disabled. */  in srcu_gp_start()
799 	struct srcu_data *sdp = container_of(t, struct srcu_data, delay_work);  in srcu_delay_timer()  local
801 	queue_work_on(sdp->cpu, rcu_gp_wq, &sdp->work);  in srcu_delay_timer()
804 static void srcu_queue_delayed_work_on(struct srcu_data *sdp,  in srcu_queue_delayed_work_on()  argument
808 		queue_work_on(sdp->cpu, rcu_gp_wq, &sdp->work);  in srcu_queue_delayed_work_on()
812 	timer_reduce(&sdp->delay_work, jiffies + delay);  in srcu_queue_delayed_work_on()
819 static void srcu_schedule_cbs_sdp(struct srcu_data *sdp, unsigned long delay)  in srcu_schedule_cbs_sdp()  argument
821 	srcu_queue_delayed_work_on(sdp, delay);  in srcu_schedule_cbs_sdp()
861 	struct srcu_data *sdp;  in srcu_gp_end()  local
918 			sdp = per_cpu_ptr(ssp->sda, cpu);  in srcu_gp_end()
919 			spin_lock_irqsave_rcu_node(sdp, flags);  in srcu_gp_end()
920 			if (ULONG_CMP_GE(gpseq, sdp->srcu_gp_seq_needed + 100))  in srcu_gp_end()
921 				sdp->srcu_gp_seq_needed = gpseq;  in srcu_gp_end()
922 			if (ULONG_CMP_GE(gpseq, sdp->srcu_gp_seq_needed_exp + 100))  in srcu_gp_end()
923 				sdp->srcu_gp_seq_needed_exp = gpseq;  in srcu_gp_end()
924 			spin_unlock_irqrestore_rcu_node(sdp, flags);  in srcu_gp_end()
998 static void srcu_funnel_gp_start(struct srcu_struct *ssp, struct srcu_data *sdp,  in srcu_funnel_gp_start()  argument
1002 	int idx = rcu_seq_ctr(s) % ARRAY_SIZE(sdp->mynode->srcu_have_cbs);  in srcu_funnel_gp_start()
1013 		snp_leaf = sdp->mynode;  in srcu_funnel_gp_start()
1024 					snp->srcu_data_have_cbs[idx] |= sdp->grpmask;  in srcu_funnel_gp_start()
1027 					srcu_schedule_cbs_sdp(sdp, do_norm ? SRCU_INTERVAL : 0);  in srcu_funnel_gp_start()
1036 				snp->srcu_data_have_cbs[idx] |= sdp->grpmask;  in srcu_funnel_gp_start()
1170 	struct srcu_data *sdp;  in srcu_might_be_idle()  local
1176 	sdp = raw_cpu_ptr(ssp->sda);  in srcu_might_be_idle()
1177 	spin_lock_irqsave_rcu_node(sdp, flags);  in srcu_might_be_idle()
1178 	if (rcu_segcblist_pend_cbs(&sdp->srcu_cblist)) {  in srcu_might_be_idle()
1179 		spin_unlock_irqrestore_rcu_node(sdp, flags);  in srcu_might_be_idle()
1182 	spin_unlock_irqrestore_rcu_node(sdp, flags);  in srcu_might_be_idle()
1226 	struct srcu_data *sdp;  in srcu_gp_start_if_needed()  local
1239 		sdp = per_cpu_ptr(ssp->sda, get_boot_cpu_id());  in srcu_gp_start_if_needed()
1241 		sdp = raw_cpu_ptr(ssp->sda);  in srcu_gp_start_if_needed()
1242 	spin_lock_irqsave_sdp_contention(sdp, &flags);  in srcu_gp_start_if_needed()
1244 		rcu_segcblist_enqueue(&sdp->srcu_cblist, rhp);  in srcu_gp_start_if_needed()
1245 	rcu_segcblist_advance(&sdp->srcu_cblist,  in srcu_gp_start_if_needed()
1248 	(void)rcu_segcblist_accelerate(&sdp->srcu_cblist, s);  in srcu_gp_start_if_needed()
1249 	if (ULONG_CMP_LT(sdp->srcu_gp_seq_needed, s)) {  in srcu_gp_start_if_needed()
1250 		sdp->srcu_gp_seq_needed = s;  in srcu_gp_start_if_needed()
1253 	if (!do_norm && ULONG_CMP_LT(sdp->srcu_gp_seq_needed_exp, s)) {  in srcu_gp_start_if_needed()
1254 		sdp->srcu_gp_seq_needed_exp = s;  in srcu_gp_start_if_needed()
1257 	spin_unlock_irqrestore_rcu_node(sdp, flags);  in srcu_gp_start_if_needed()
1263 		sdp_mynode = sdp->mynode;  in srcu_gp_start_if_needed()
1266 		srcu_funnel_gp_start(ssp, sdp, s, do_norm);  in srcu_gp_start_if_needed()
1521 	struct srcu_data *sdp;  in srcu_barrier_cb()  local
1524 	sdp = container_of(rhp, struct srcu_data, srcu_barrier_head);  in srcu_barrier_cb()
1525 	ssp = sdp->ssp;  in srcu_barrier_cb()
1538 static void srcu_barrier_one_cpu(struct srcu_struct *ssp, struct srcu_data *sdp)  in srcu_barrier_one_cpu()  argument
1540 	spin_lock_irq_rcu_node(sdp);  in srcu_barrier_one_cpu()
1542 	sdp->srcu_barrier_head.func = srcu_barrier_cb;  in srcu_barrier_one_cpu()
1543 	debug_rcu_head_queue(&sdp->srcu_barrier_head);  in srcu_barrier_one_cpu()
1544 	if (!rcu_segcblist_entrain(&sdp->srcu_cblist,  in srcu_barrier_one_cpu()
1545 				   &sdp->srcu_barrier_head)) {  in srcu_barrier_one_cpu()
1546 		debug_rcu_head_unqueue(&sdp->srcu_barrier_head);  in srcu_barrier_one_cpu()
1549 	spin_unlock_irq_rcu_node(sdp);  in srcu_barrier_one_cpu()
1687 	struct srcu_data *sdp;  in srcu_invoke_callbacks()  local
1690 	sdp = container_of(work, struct srcu_data, work);  in srcu_invoke_callbacks()
1692 	ssp = sdp->ssp;  in srcu_invoke_callbacks()
1694 	spin_lock_irq_rcu_node(sdp);  in srcu_invoke_callbacks()
1695 	rcu_segcblist_advance(&sdp->srcu_cblist,  in srcu_invoke_callbacks()
1697 	if (sdp->srcu_cblist_invoking ||  in srcu_invoke_callbacks()
1698 	    !rcu_segcblist_ready_cbs(&sdp->srcu_cblist)) {  in srcu_invoke_callbacks()
1699 		spin_unlock_irq_rcu_node(sdp);  in srcu_invoke_callbacks()
1704 	sdp->srcu_cblist_invoking = true;  in srcu_invoke_callbacks()
1705 	rcu_segcblist_extract_done_cbs(&sdp->srcu_cblist, &ready_cbs);  in srcu_invoke_callbacks()
1707 	spin_unlock_irq_rcu_node(sdp);  in srcu_invoke_callbacks()
1721 	spin_lock_irq_rcu_node(sdp);  in srcu_invoke_callbacks()
1722 	rcu_segcblist_add_len(&sdp->srcu_cblist, -len);  in srcu_invoke_callbacks()
1723 	(void)rcu_segcblist_accelerate(&sdp->srcu_cblist,  in srcu_invoke_callbacks()
1725 	sdp->srcu_cblist_invoking = false;  in srcu_invoke_callbacks()
1726 	more = rcu_segcblist_ready_cbs(&sdp->srcu_cblist);  in srcu_invoke_callbacks()
1727 	spin_unlock_irq_rcu_node(sdp);  in srcu_invoke_callbacks()
1729 		srcu_schedule_cbs_sdp(sdp, 0);  in srcu_invoke_callbacks()
1834 			struct srcu_data *sdp;  in srcu_torture_stats_print()  local
1836 			sdp = per_cpu_ptr(ssp->sda, cpu);  in srcu_torture_stats_print()
1837 			u0 = data_race(atomic_long_read(&sdp->srcu_unlock_count[!idx]));  in srcu_torture_stats_print()
1838 			u1 = data_race(atomic_long_read(&sdp->srcu_unlock_count[idx]));  in srcu_torture_stats_print()
1846 			l0 = data_race(atomic_long_read(&sdp->srcu_lock_count[!idx]));  in srcu_torture_stats_print()
1847 			l1 = data_race(atomic_long_read(&sdp->srcu_lock_count[idx]));  in srcu_torture_stats_print()
1853 				"C."[rcu_segcblist_empty(&sdp->srcu_cblist)]);  in srcu_torture_stats_print()