static struct _urb *_urb_alloc(int isoc, int gfp)
static struct _urb *_urb_alloc(int isoc, unsigned int __nocast gfp)
static struct _urb *_urb_alloc(int isoc, int gfp){	struct _urb *_urb = kmalloc(sizeof(struct _urb) +				sizeof(struct usb_iso_packet_descriptor) * isoc, gfp);	if (_urb) {		memset(_urb, 0, sizeof(*_urb));		usb_init_urb(&_urb->urb);	}	return _urb;}