compat/sys/buf_ring.h

120 	uint32_t cons_head, cons_next;
126 		cons_next = (cons_head + 1) & br->br_cons_mask;
132 	} while (!atomic_cmpset_acq_int(&br->br_cons_head, cons_head, cons_next));
146 	atomic_store_rel_int(&br->br_cons_tail, cons_next);
160 	uint32_t cons_head, cons_next;
199 	cons_next = (cons_head + 1) & br->br_cons_mask;
208 	if (cons_next != prod_tail) {
209 		prefetch(br->br_ring[cons_next]);
214 	br->br_cons_head = cons_next;
225 	br->br_cons_tail = cons_next;
237 	uint32_t cons_head, cons_next;
243 	cons_next = (cons_head + 1) & br->br_cons_mask;
246 	br->br_cons_head = cons_next;
250 	br->br_cons_tail = cons_next;