extern int ttm_prime_object_init(struct ttm_object_file *tfile,
				 size_t size,
				 struct ttm_prime_object *prime,
				 bool shareable,
				 enum ttm_object_type type,
				 void (*refcount_release)
				 (struct ttm_base_object **))
extern int ttm_prime_object_init(struct ttm_object_file *tfile,
				 size_t size,
				 struct ttm_prime_object *prime,
				 enum ttm_object_type type,
				 void (*refcount_release)
				 (struct ttm_base_object **))