block: pass a gendisk to bdev_resize_partition

bdev_resize_partition can only operate on the whole device.  Make that clear
by passing a gendisk instead of a block_device.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210810154512.1809898-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk.h b/block/blk.h
index 21c441e..db6f82b 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -350,8 +350,8 @@ void blk_free_ext_minor(unsigned int minor);
 int bdev_add_partition(struct gendisk *disk, int partno, sector_t start,
 		sector_t length);
 int bdev_del_partition(struct gendisk *disk, int partno);
-int bdev_resize_partition(struct block_device *bdev, int partno,
-		sector_t start, sector_t length);
+int bdev_resize_partition(struct gendisk *disk, int partno, sector_t start,
+		sector_t length);
 
 int bio_add_hw_page(struct request_queue *q, struct bio *bio,
 		struct page *page, unsigned int len, unsigned int offset,