VHOST_VDPA_IOTLB_BUCKETS
struct hlist_head *head = &v->as[asid % VHOST_VDPA_IOTLB_BUCKETS];
for (i = 0; i < VHOST_VDPA_IOTLB_BUCKETS; i++)
struct hlist_head as[VHOST_VDPA_IOTLB_BUCKETS];
struct hlist_head *head = &v->as[asid % VHOST_VDPA_IOTLB_BUCKETS];