31 struct rcu_ctrlblk {  struct
39 static struct rcu_ctrlblk rcu_ctrlblk = {  variable
40 	.donetail	= &rcu_ctrlblk.rcucblist,
41 	.curtail	= &rcu_ctrlblk.rcucblist,
57 	if (rcu_ctrlblk.donetail != rcu_ctrlblk.curtail) {  in rcu_qs()
58 		rcu_ctrlblk.donetail = rcu_ctrlblk.curtail;  in rcu_qs()
61 	WRITE_ONCE(rcu_ctrlblk.gp_seq, rcu_ctrlblk.gp_seq + 2);  in rcu_qs()
75 	} else if (rcu_ctrlblk.donetail != rcu_ctrlblk.curtail) {  in rcu_sched_clock_irq()
108 	if (rcu_ctrlblk.donetail == &rcu_ctrlblk.rcucblist) {  in rcu_process_callbacks()
113 	list = rcu_ctrlblk.rcucblist;  in rcu_process_callbacks()
114 	rcu_ctrlblk.rcucblist = *rcu_ctrlblk.donetail;  in rcu_process_callbacks()
115 	*rcu_ctrlblk.donetail = NULL;  in rcu_process_callbacks()
116 	if (rcu_ctrlblk.curtail == rcu_ctrlblk.donetail)  in rcu_process_callbacks()
117 		rcu_ctrlblk.curtail = &rcu_ctrlblk.rcucblist;  in rcu_process_callbacks()
118 	rcu_ctrlblk.donetail = &rcu_ctrlblk.rcucblist;  in rcu_process_callbacks()
150 	WRITE_ONCE(rcu_ctrlblk.gp_seq, rcu_ctrlblk.gp_seq + 2);  in synchronize_rcu()
177 	*rcu_ctrlblk.curtail = head;  in call_rcu()
178 	rcu_ctrlblk.curtail = &head->next;  in call_rcu()
204 	return READ_ONCE(rcu_ctrlblk.gp_seq);  in get_state_synchronize_rcu()
231 	return oldstate == RCU_GET_STATE_COMPLETED || READ_ONCE(rcu_ctrlblk.gp_seq) != oldstate;  in poll_state_synchronize_rcu()
238 	return READ_ONCE(rcu_ctrlblk.gp_seq) & 0xffffULL;  in rcutorture_gather_gp_seqs()