HelenOS sources

usbvirt_device_unplug  244 uspace/app/vuhid/main.c 	usbvirt_device_unplug(&hid_dev);
usbvirt_device_unplug  246 uspace/lib/usbvirt/include/usbvirt/device.h extern void usbvirt_device_unplug(usbvirt_device_t *);
HelenOS homepage, sources at GitHub