__v4l2_subdev_init_finalize
rval = __v4l2_subdev_init_finalize(&ssd->sd, lock_name, lock_key);
EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize);
__v4l2_subdev_init_finalize(sd, name, &__key); \
int __v4l2_subdev_init_finalize(struct v4l2_subdev *sd, const char *name,