linux-kernel - [PATCH 01/11] fs: remove bdev->bd_inode_backing_dev

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Date:	Tue, 15 Sep 2009 20:16:47 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:	chris.mason@...cle.com, hch@...radead.org, tytso@....edu,
	akpm@...ux-foundation.org, jack@...e.cz,
	trond.myklebust@....uio.no, Jens Axboe <jens.axboe@...cle.com>
Subject: [PATCH 01/11] fs: remove bdev->bd_inode_backing_dev_info

It has been unused since it was introduced in:

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

    [PATCH] block device layer: separate backing_dev_info infrastructure

So lets just kill it.

Signed-off-by: Jens Axboe <jens.axboe@...cle.com>
---
 fs/block_dev.c        |    1 -
 fs/inode.c            |    4 +---
 fs/nilfs2/the_nilfs.c |    4 +---
 include/linux/fs.h    |    1 -
 4 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 3581a4e..71e7e03 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);
 }
 
diff --git a/fs/inode.c b/fs/inode.c
index ae7b67e..b2ba83d 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -182,9 +182,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
 	if (sb->s_bdev) {
 		struct backing_dev_info *bdi;
 
-		bdi = sb->s_bdev->bd_inode_backing_dev_info;
-		if (!bdi)
-			bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
+		bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
 		mapping->backing_dev_info = bdi;
 	}
 	inode->i_private = NULL;
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index d4168e2..ad391a8 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -591,9 +591,7 @@ int init_nilfs(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi, char *data)
 
 	nilfs->ns_mount_state = le16_to_cpu(sbp->s_state);
 
-	bdi = nilfs->ns_bdev->bd_inode_backing_dev_info;
-	if (!bdi)
-		bdi = nilfs->ns_bdev->bd_inode->i_mapping->backing_dev_info;
+	bdi = nilfs->ns_bdev->bd_inode->i_mapping->backing_dev_info;
 	nilfs->ns_bdi = bdi ? : &default_backing_dev_info;
 
 	/* Finding last segment */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b21cf6b..db29588 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -655,7 +655,6 @@ struct block_device {
 	int			bd_invalidated;
 	struct gendisk *	bd_disk;
 	struct list_head	bd_list;
-	struct backing_dev_info *bd_inode_backing_dev_info;
 	/*
 	 * Private data.  You must have bd_claim'ed the block_device
 	 * to use this.  NOTE:  bd_claim allows an owner to claim
-- 
1.6.4.1.207.g68ea

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