void oz_remember_urb(struct urb *urb);
int oz_forget_urb(struct urb *urb);
#else
-#define oz_remember_urb(__x)
-#define oz_forget_urb(__x) 0
+static inline void oz_remember_urb(struct urb *urb) {}
+static inline int oz_forget_urb(struct urb *urb) { return 0; }
#endif /* WANT_URB_PARANOIA */