sys/xen/xenbus/init.txt

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   2
   3 - frontend driver initializes static xenbus_driver with _ids, _probe, _remove,
   4 _resume, _otherend_changed
   5
   6     - initialization calls xenbus_register_frontend(xenbus_driver)
   7
   8         - xenbus_register_frontend sets read_otherend details to read_backend_details
   9         then calls xenbus_register_driver_common(xenbus_driver, xenbus_frontend)
  10
  11              - xenbus_register_driver_common sets underlying driver name to xenbus_driver name
  12              underlying driver bus to xenbus_frontend's bus, driver's probe to xenbus_dev_probe
  13              driver's remove to xenbus_dev_remove then calls driver_register
  14