fs: remove bdev->bd_inode_backing_dev_info

It has been unused since it was introduced in:

commit 520808bf20e90fdbdb320264ba7dd5cf9d47dcac
Author: Andrew Morton <akpm@osdl.org>
Date:   Fri May 21 00:46:17 2004 -0700

    [PATCH] block device layer: separate backing_dev_info infrastructure

So lets just kill it.

Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 3581a4e53942..71e7e03ac343 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -420,7 +420,6 @@ static void bdev_destroy_inode(struct inode *inode)
 {
         struct bdev_inode *bdi = BDEV_I(inode);
 
-        bdi->bdev.bd_inode_backing_dev_info = NULL;
         kmem_cache_free(bdev_cachep, bdi);
 }