309  * because its refcount is grabbed except for part0, which lifetime
313  * Found partition on success, part0 is returned if no partition matches
345 	part = &disk->part0;  in disk_map_sector_rcu()
729 	disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);  in register_disk()
785 	/* minors == 0 indicates to use ext devt from part0 and should  in __device_add_disk()
795 	retval = blk_alloc_devt(&disk->part0, &devt);  in __device_add_disk()
944 	kobject_put(disk->part0.holder_dir);  in del_gendisk()
947 	part_stat_set_all(&disk->part0, 0);  in del_gendisk()
948 	disk->part0.stamp = 0;  in del_gendisk()
1094 			bool is_part0 = part == &disk->part0;  in printk_all_partitions()
1564 	hd_free_part(&disk->part0);  in disk_release()
1730 	disk->part0.dkstats = alloc_percpu(struct disk_stats);  in __alloc_disk_node()
1731 	if (!disk->part0.dkstats)  in __alloc_disk_node()
1737 		free_percpu(disk->part0.dkstats);  in __alloc_disk_node()
1742 	rcu_assign_pointer(ptbl->part[0], &disk->part0);  in __alloc_disk_node()
1746 	 * seqcounter to read/update the part0->nr_sects. Still init  in __alloc_disk_node()
1753 	hd_sects_seq_init(&disk->part0);  in __alloc_disk_node()
1754 	if (hd_ref_init(&disk->part0))  in __alloc_disk_node()
1765 	hd_free_part(&disk->part0);  in __alloc_disk_node()
1861 	if (disk->part0.policy != flag) {  in set_disk_ro()
1863 		disk->part0.policy = flag;  in set_disk_ro()