56 static struct usb_class {  struct
59 } *usb_class;  variable
75 	if (usb_class != NULL) {  in init_usb_class()
76 		kref_get(&usb_class->kref);  in init_usb_class()
80 	usb_class = kmalloc(sizeof(*usb_class), GFP_KERNEL);  in init_usb_class()
81 	if (!usb_class) {  in init_usb_class()
86 	kref_init(&usb_class->kref);  in init_usb_class()
87 	usb_class->class = class_create(THIS_MODULE, "usbmisc");  in init_usb_class()
88 	if (IS_ERR(usb_class->class)) {  in init_usb_class()
89 		result = PTR_ERR(usb_class->class);  in init_usb_class()
91 		kfree(usb_class);  in init_usb_class()
92 		usb_class = NULL;  in init_usb_class()
95 	usb_class->class->devnode = usb_devnode;  in init_usb_class()
104 	class_destroy(usb_class->class);  in release_usb_class()
105 	kfree(usb_class);  in release_usb_class()
106 	usb_class = NULL;  in release_usb_class()
111 	if (usb_class)  in destroy_usb_class()
112 		kref_put(&usb_class->kref, release_usb_class);  in destroy_usb_class()
200 	intf->usb_dev = device_create(usb_class->class, &intf->dev,  in usb_register_dev()
240 	device_destroy(usb_class->class, MKDEV(USB_MAJOR, intf->minor));  in usb_deregister_dev()