43 	unsigned short last_used_idx;  member
80 	guest.last_used_idx = 0;  in alloc_ring()
159 	head = (ring_size - 1) & guest.last_used_idx;  in get_buf()
161 	if ((index ^ guest.last_used_idx ^ 0x8000) & ~(ring_size - 1))  in get_buf()
167 	if (ring.used->idx == guest.last_used_idx)  in get_buf()
172 	head = (ring_size - 1) & guest.last_used_idx;  in get_buf()
175 	head = (ring_size - 1) & guest.last_used_idx;  in get_buf()
193 	guest.last_used_idx++;  in get_buf()
199 	unsigned short last_used_idx = guest.last_used_idx;  in used_empty()  local
201 	unsigned short head = last_used_idx & (ring_size - 1);  in used_empty()
204 	return (index ^ last_used_idx ^ 0x8000) & ~(ring_size - 1);  in used_empty()
206 	return ring.used->idx == last_used_idx;  in used_empty()
219 	vring_used_event(&ring) = guest.last_used_idx;  in enable_call()