struct usb_bus *bus = to_usb_bus(class_dev); 
struct usb_bus *bus = container_of(kref, struct usb_bus, kref); 
static void usb_host_release(struct class_device *class_dev){	struct usb_bus *bus = to_usb_bus(class_dev);	if (bus->release)		bus->release(bus);}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/8561b10f6e7ef0a085709ffc844f74130a067abe/hcd.c/clean/drivers/usb/core/hcd.c