extern struct nvkm_oclass *gk20a_fifo_oclass;
extern struct nvkm_oclass *gk208_fifo_oclass;
extern struct nvkm_oclass *gm204_fifo_oclass;
+extern struct nvkm_oclass *gm20b_fifo_oclass;
int nvkm_fifo_uevent_ctor(struct nvkm_object *, void *, u32,
struct nvkm_notify *);