[PATCH] ext4: remove block_device_ejected

[Christoph Hellwig <hch@lst.de>]

bdi->dev now never goes away, so this function became useless.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/ext4/super.c | 18 +-----------------
 1 file changed, 1 insertion(+), 17 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ad88e60..826cb66 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -323,22 +323,6 @@ static void save_error_info(struct super_block *sb, const char *func,
 	ext4_commit_super(sb, 1);
 }
 
-/*
- * The del_gendisk() function uninitializes the disk-specific data
- * structures, including the bdi structure, without telling anyone
- * else.  Once this happens, any attempt to call mark_buffer_dirty()
- * (for example, by ext4_commit_super), will cause a kernel OOPS.
- * This is a kludge to prevent these oops until we can put in a proper
- * hook in del_gendisk() to inform the VFS and file system layers.
- */
-static int block_device_ejected(struct super_block *sb)
-{
-	struct inode *bd_inode = sb->s_bdev->bd_inode;
-	struct backing_dev_info *bdi = inode_to_bdi(bd_inode);
-
-	return bdi->dev == NULL;
-}