[RFC PATCH 09/18] nbd: use init disk helper

[Chaitanya Kulkarni]

Add and use the helper to initialize the common fields of struct gendisk
such as major, first_minor, minors, disk_name, private_data, and ops.
This initialization is spread all over the block drivers. This avoids
code repetation of inialization code of gendisk in current block drivers
and any future ones.

Signed-off-by: Chaitanya Kulkarni <kch@xxxxxxxxxx>
---
 drivers/block/nbd.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 2a2a1d996a57..b4f2d7e1be89 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1816,12 +1816,9 @@ static struct nbd_device *nbd_dev_add(int index, unsigned int refs)
 	 */
 	refcount_set(&nbd->refs, 0);
 	INIT_LIST_HEAD(&nbd->list);
-	disk->major = NBD_MAJOR;
-	disk->first_minor = index << part_shift;
-	disk->minors = 1 << part_shift;
-	disk->fops = &nbd_fops;
-	disk->private_data = nbd;
 	sprintf(disk->disk_name, "nbd%d", index);
+	init_disk(disk, NBD_MAJOR, index << part_shift, 1 << part_shift, 0,
+			nbd, &nbd_fops);
 	err = add_disk(disk);
 	if (err)
 		goto out_free_work;
-- 
2.29.0