[PATCH 39/45] block: remove the partno field from struct hd_struct

[Christoph Hellwig <hch@xxxxxx>]

Just use the bd_partno field in struct block_device everywhere.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 block/genhd.c           | 12 ++++++------
 block/partitions/core.c |  9 ++++-----
 include/linux/genhd.h   |  1 -
 init/do_mounts.c        |  2 +-
 4 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 197120c0c60f23..60004bc8ba5b56 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -576,8 +576,8 @@ 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;
        }
 
@@ -847,7 +847,7 @@ 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);
@@ -989,7 +989,7 @@ 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) {
@@ -1083,7 +1083,7 @@ 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;
@@ -1506,7 +1506,7 @@ 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],
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 8beab9e7727e27..ee4f4e3237aa2d 100644
--- a/block/partitions/core.c
+++ b/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)
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 77443a1031e373..afe27a0b8f5dd8 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -54,7 +54,6 @@ struct partition_meta_info {
 struct hd_struct {
        struct block_device *bdev;
        struct device __dev;
-       int partno;
 };
 
 /**
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 368ccb71850126..86bef93e72ebd6 100644
--- a/init/do_mounts.c
+++ b/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));
-- 
2.29.2