155 	unsigned index;  in get_buf()  local
160 	index = ring.used->ring[head].id;  in get_buf()
161 	if ((index ^ guest.last_used_idx ^ 0x8000) & ~(ring_size - 1))  in get_buf()
165 	index &= ring_size - 1;  in get_buf()
173 	index = head;  in get_buf()
176 	index = ring.used->ring[head].id;  in get_buf()
181 	*lenp = ring.desc[index].len;  in get_buf()
185 	datap = data[index].data;  in get_buf()
186 	*bufp = (void*)(unsigned long)ring.desc[index].addr;  in get_buf()
187 	data[index].data = NULL;  in get_buf()
189 	ring.desc[index].next = guest.free_head;  in get_buf()
190 	guest.free_head = index;  in get_buf()
202 	unsigned index = ring.used->ring[head].id;  in used_empty()  local
204 	return (index ^ last_used_idx ^ 0x8000) & ~(ring_size - 1);  in used_empty()
262 	unsigned index = ring.avail->ring[head & (ring_size - 1)];  in avail_empty()  local
264 	return ((index ^ head ^ 0x8000) & ~(ring_size - 1));  in avail_empty()