VIRTQUEUE_ALIGN
allocsize1 = VIRTQUEUE_ALIGN(sizeof(struct vring_desc) * vq_size
allocsize2 = VIRTQUEUE_ALIGN(sizeof(uint16_t) * hdrlen
vq_info->vq_usedoffset = VIRTQUEUE_ALIGN(
allocsize1 = VIRTQUEUE_ALIGN(sizeof(struct vring_desc) * vq_size
allocsize2 = VIRTQUEUE_ALIGN(sizeof(uint16_t) * 2
vq_info->vq_usedoffset = VIRTQUEUE_ALIGN(