block: remove the partno field from struct hd_struct

Just use the bd_partno field in struct block_device everywhere.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/genhd.c

@@ -589,8 +589,8 @@ int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
 	int idx;
 
 	/* in consecutive minor range? */
-	if (part->partno < disk->minors) {
-		*devt = MKDEV(disk->major, disk->first_minor + part->partno);
+	if (part->bdev->bd_partno < disk->minors) {
+		*devt = MKDEV(disk->major, disk->first_minor + part->bdev->bd_partno);
 		return 0;
 	}
 
@@ -864,7 +864,7 @@ void del_gendisk(struct gendisk *disk)
 	disk_part_iter_init(&piter, disk,
 			     DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
 	while ((part = disk_part_iter_next(&piter))) {
-		invalidate_partition(disk, part->partno);
+		invalidate_partition(disk, part->bdev->bd_partno);
 		delete_partition(part);
 	}
 	disk_part_iter_exit(&piter);
@@ -1008,7 +1008,7 @@ void __init printk_all_partitions(void)
 			printk("%s%s %10llu %s %s", is_part0 ? "" : "  ",
 			       bdevt_str(part_devt(part), devt_buf),
 			       bdev_nr_sectors(part->bdev) >> 1,
-			       disk_name(disk, part->partno, name_buf),
+			       disk_name(disk, part->bdev->bd_partno, name_buf),
 			       part->bdev->bd_meta_info ?
 					part->bdev->bd_meta_info->uuid : "");
 			if (is_part0) {
@@ -1102,7 +1102,7 @@ static int show_partition(struct seq_file *seqf, void *v)
 		seq_printf(seqf, "%4d  %7d %10llu %s\n",
 			   MAJOR(part_devt(part)), MINOR(part_devt(part)),
 			   bdev_nr_sectors(part->bdev) >> 1,
-			   disk_name(sgp, part->partno, buf));
+			   disk_name(sgp, part->bdev->bd_partno, buf));
 	disk_part_iter_exit(&piter);
 
 	return 0;
@@ -1525,7 +1525,7 @@ static int diskstats_show(struct seq_file *seqf, void *v)
 			   "%lu %u"
 			   "\n",
 			   MAJOR(part_devt(hd)), MINOR(part_devt(hd)),
-			   disk_name(gp, hd->partno, buf),
+			   disk_name(gp, hd->bdev->bd_partno, buf),
 			   stat.ios[STAT_READ],
 			   stat.merges[STAT_READ],
 			   stat.sectors[STAT_READ],

block/partitions/core.c

@@ -184,7 +184,7 @@ static ssize_t part_partition_show(struct device *dev,
 {
 	struct hd_struct *p = dev_to_part(dev);
 
-	return sprintf(buf, "%d\n", p->partno);
+	return sprintf(buf, "%d\n", p->bdev->bd_partno);
 }
 
 static ssize_t part_start_show(struct device *dev,
@@ -274,7 +274,7 @@ static int part_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct hd_struct *part = dev_to_part(dev);
 
-	add_uevent_var(env, "PARTN=%u", part->partno);
+	add_uevent_var(env, "PARTN=%u", part->bdev->bd_partno);
 	if (part->bdev->bd_meta_info && part->bdev->bd_meta_info->volname[0])
 		add_uevent_var(env, "PARTNAME=%s",
 			       part->bdev->bd_meta_info->volname);
@@ -298,7 +298,7 @@ void delete_partition(struct hd_struct *part)
 	struct disk_part_tbl *ptbl =
 		rcu_dereference_protected(disk->part_tbl, 1);
 
-	rcu_assign_pointer(ptbl->part[part->partno], NULL);
+	rcu_assign_pointer(ptbl->part[part->bdev->bd_partno], NULL);
 	rcu_assign_pointer(ptbl->last_lookup, NULL);
 
 	kobject_put(part->bdev->bd_holder_dir);
@@ -372,7 +372,6 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno,
 
 	bdev->bd_start_sect = start;
 	bdev_set_nr_sectors(bdev, len);
-	p->partno = partno;
 	bdev->bd_read_only = get_disk_ro(disk);
 
 	if (info) {
@@ -445,7 +444,7 @@ static bool partition_overlaps(struct gendisk *disk, sector_t start,
 
 	disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
 	while ((part = disk_part_iter_next(&piter))) {
-		if (part->partno == skip_partno ||
+		if (part->bdev->bd_partno == skip_partno ||
 		    start >= part->bdev->bd_start_sect +
 			bdev_nr_sectors(part->bdev) ||
 		    start + length <= part->bdev->bd_start_sect)

include/linux/genhd.h

@@ -54,7 +54,6 @@ struct partition_meta_info {
 struct hd_struct {
 	struct block_device *bdev;
 	struct device __dev;
-	int partno;
 };
 
 /**

init/do_mounts.c

@@ -136,7 +136,7 @@ static dev_t devt_from_partuuid(const char *uuid_str)
 		struct hd_struct *part;
 
 		part = disk_get_part(dev_to_disk(dev),
-				     dev_to_part(dev)->partno + offset);
+				     dev_to_part(dev)->bdev->bd_partno + offset);
 		if (part) {
 			devt = part_devt(part);
 			put_device(part_to_dev(part));