125 	struct cyc2ns *c2n = &per_cpu(cyc2ns, cpu);  in cyc2ns_write_begin()  local
126 	struct cyc2ns_data *data = c2n->data;  in cyc2ns_write_begin()
128 	if (data == c2n->head)  in cyc2ns_write_begin()
138 	while (c2n->tail == data)  in cyc2ns_write_begin()
146 	struct cyc2ns *c2n = &per_cpu(cyc2ns, cpu);  in cyc2ns_write_end()  local
154 	ACCESS_ONCE(c2n->head) = data;  in cyc2ns_write_end()
191 	struct cyc2ns *c2n = &per_cpu(cyc2ns, cpu);  in cyc2ns_init()  local
193 	cyc2ns_data_init(&c2n->data[0]);  in cyc2ns_init()
194 	cyc2ns_data_init(&c2n->data[1]);  in cyc2ns_init()
196 	c2n->head = c2n->data;  in cyc2ns_init()
197 	c2n->tail = c2n->data;  in cyc2ns_init()