struct class_device *class_dev; /* class device for this bus */
struct kref kref; /* handles reference counting this bus */
void (*release)(struct usb_bus *bus); /* function to destroy this bus's memory */
-#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
+#if defined(CONFIG_USB_MON)
struct mon_bus *mon_bus; /* non-null when associated */
int monitored; /* non-zero when monitored */
#endif