void __submit_metadata_vio(struct vio *vio, physical_block_number_t physical,
			   bio_end_io_t callback, vdo_action_fn error_handler,
			   unsigned int operation, char *data)
void __submit_metadata_vio(struct vio *vio, physical_block_number_t physical,
			   bio_end_io_t callback, vdo_action_fn error_handler,
			   blk_opf_t operation, char *data)