block: move holder_dir to struct block_device

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

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>

diff --git a/block/genhd.c b/block/genhd.c
index 4273e89..0bd7026 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -681,7 +681,8 @@ 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) {
@@ -887,7 +888,7 @@ 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 07df9ff..c068471 100644 (file)
--- 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 @@ out_free:
 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 0770f65..381c224 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1142,7 +1142,7 @@ 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);
@@ -1165,14 +1165,14 @@ 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;
@@ -1207,9 +1207,8 @@ 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 2f8ede0..c0591e5 100644 (file)
--- 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 30d7076..b4a5c05 100644 (file)
--- 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;