/**
* xenbus_switch_state
* @dev: xenbus device
- * @xbt: transaction handle
* @state: new state
*
* Advertise in the store a change of the given driver to the given new_state.
* @fmt: error message format
*
* Equivalent to xenbus_dev_error(dev, err, fmt, args), followed by
- * xenbus_switch_state(dev, NULL, XenbusStateClosing) to schedule an orderly
+ * xenbus_switch_state(dev, XenbusStateClosing) to schedule an orderly
* closedown of this driver and its peer.
*/