103 	unsigned avail;  in add_inbuf()  local
135 	avail = guest.avail_idx++;  in add_inbuf()
136 	ring.avail->ring[avail & (ring_size - 1)] =  in add_inbuf()
137 		(head | (avail & ~(ring_size - 1))) ^ 0x8000;  in add_inbuf()
142 	avail = (ring_size - 1) & (guest.avail_idx++);  in add_inbuf()
143 	ring.avail->ring[avail] = head;  in add_inbuf()
148 	ring.avail->idx = guest.avail_idx;  in add_inbuf()
262 	unsigned index = ring.avail->ring[head & (ring_size - 1)];  in avail_empty()
266 	return head == ring.avail->idx;  in avail_empty()
277 	head = ring.avail->ring[used_idx & (ring_size - 1)];  in use_buf()
286 	if (used_idx == ring.avail->idx)  in use_buf()
296 	head = ring.avail->ring[used_idx];  in use_buf()