text: #ifndef _VIRTIO_RING_ALLOCATION_H
  #define _VIRTIO_RING_ALLOCATION_H
  
  struct virtqueue *vring_new_virtqueue(unsigned int index,
      unsigned int num,
      unsigned int vring_align,
      VirtIODevice *vdev,
      void *pages,
      void (*notify)(struct virtqueue *),
      void *control);
  
  unsigned int vring_control_block_size();
  
  #endif /* _VIRTIO_RING_ALLOCATION_H */
  