__must_check int afs_event(enum afs_events event, struct para_buffer *pb,
void *data);
int send_callback_request(afs_callback *f, struct osl_object *query,
__must_check int afs_event(enum afs_events event, struct para_buffer *pb,
void *data);
int send_callback_request(afs_callback *f, struct osl_object *query,