[PATCH 34/45] block: move holder_dir to struct block_device

[Christoph Hellwig <hch@xxxxxx>]

Move the holder_dir field to struct block_device in preparation for
kill struct hd_struct.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 block/genhd.c             |  5 +++--
 block/partitions/core.c   |  8 ++++----
 fs/block_dev.c            | 11 +++++------
 include/linux/blk_types.h |  1 +
 include/linux/genhd.h     |  1 -
 5 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 20c7bf6d091e94..a991f0122e53d8 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -671,7 +671,8 @@ static void register_disk(struct device *parent, struct 
gendisk *disk,
         */
        pm_runtime_set_memalloc_noio(ddev, true);
 
-       disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
+       disk->part0.bdev->bd_holder_dir =
+                       kobject_create_and_add("holders", &ddev->kobj);
        disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
 
        if (disk->flags & GENHD_FL_HIDDEN) {
@@ -871,7 +872,7 @@ void del_gendisk(struct gendisk *disk)
 
        blk_unregister_queue(disk);
 
-       kobject_put(disk->part0.holder_dir);
+       kobject_put(disk->part0.bdev->bd_holder_dir);
        kobject_put(disk->slave_dir);
 
        part_stat_set_all(&disk->part0, 0);
diff --git a/block/partitions/core.c b/block/partitions/core.c
index e24673b4cba61f..ff60a14ed4dcdd 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -344,7 +344,7 @@ void delete_partition(struct hd_struct *part)
         */
        get_device(disk_to_dev(disk));
        rcu_assign_pointer(ptbl->part[part->partno], NULL);
-       kobject_put(part->holder_dir);
+       kobject_put(part->bdev->bd_holder_dir);
        device_del(part_to_dev(part));
 
        /*
@@ -452,8 +452,8 @@ static struct hd_struct *add_partition(struct gendisk 
*disk, int partno,
                goto out_put;
 
        err = -ENOMEM;
-       p->holder_dir = kobject_create_and_add("holders", &pdev->kobj);
-       if (!p->holder_dir)
+       bdev->bd_holder_dir = kobject_create_and_add("holders", &pdev->kobj);
+       if (!bdev->bd_holder_dir)
                goto out_del;
 
        dev_set_uevent_suppress(pdev, 0);
@@ -487,7 +487,7 @@ static struct hd_struct *add_partition(struct gendisk 
*disk, int partno,
 out_remove_file:
        device_remove_file(pdev, &dev_attr_whole_disk);
 out_del:
-       kobject_put(p->holder_dir);
+       kobject_put(bdev->bd_holder_dir);
        device_del(pdev);
 out_put:
        put_device(pdev);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 2393395201aa6c..0b8d6009486643 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1137,7 +1137,7 @@ int bd_link_disk_holder(struct block_device *bdev, struct 
gendisk *disk)
        WARN_ON_ONCE(!bdev->bd_holder);
 
        /* FIXME: remove the following once add_disk() handles errors */
-       if (WARN_ON(!disk->slave_dir || !bdev->bd_part->holder_dir))
+       if (WARN_ON(!disk->slave_dir || !bdev->bd_holder_dir))
                goto out_unlock;
 
        holder = bd_find_holder_disk(bdev, disk);
@@ -1160,14 +1160,14 @@ int bd_link_disk_holder(struct block_device *bdev, 
struct gendisk *disk)
        if (ret)
                goto out_free;
 
-       ret = add_symlink(bdev->bd_part->holder_dir, &disk_to_dev(disk)->kobj);
+       ret = add_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj);
        if (ret)
                goto out_del;
        /*
         * bdev could be deleted beneath us which would implicitly destroy
         * the holder directory.  Hold on to it.
         */
-       kobject_get(bdev->bd_part->holder_dir);
+       kobject_get(bdev->bd_holder_dir);
 
        list_add(&holder->list, &bdev->bd_holder_disks);
        goto out_unlock;
@@ -1202,9 +1202,8 @@ void bd_unlink_disk_holder(struct block_device *bdev, 
struct gendisk *disk)
 
        if (!WARN_ON_ONCE(holder == NULL) && !--holder->refcnt) {
                del_symlink(disk->slave_dir, bdev_kobj(bdev));
-               del_symlink(bdev->bd_part->holder_dir,
-                           &disk_to_dev(disk)->kobj);
-               kobject_put(bdev->bd_part->holder_dir);
+               del_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj);
+               kobject_put(bdev->bd_holder_dir);
                list_del_init(&holder->list);
                kfree(holder);
        }
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index 2f8ede04e5a94c..c0591e52d7d7ce 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -35,6 +35,7 @@ struct block_device {
 #ifdef CONFIG_SYSFS
        struct list_head        bd_holder_disks;
 #endif
+       struct kobject          *bd_holder_dir;
        u8                      bd_partno;
        struct hd_struct *      bd_part;
        /* number of times partitions within this device have been opened. */
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 1e52f38b719db3..c2a8cf12c5cab5 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -55,7 +55,6 @@ struct hd_struct {
 
        struct block_device *bdev;
        struct device __dev;
-       struct kobject *holder_dir;
        int policy, partno;
 #ifdef CONFIG_FAIL_MAKE_REQUEST
        int make_it_fail;
-- 
2.29.2