[PATCH] exofs: Set i_mapping->backing_dev_info anyway

[Boaz Harrosh <bharrosh@panasas.com>]

I've pushed below patch to the exofs/linux-next tree.
I know it is just pointless right now. But for documentation
sake and future ease of changes.

---
From: Boaz Harrosh <Boaz Harrosh bharrosh@panasas.com>
Subject: [PATCH] exofs: Set i_mapping->backing_dev_info anyway

Though it has been promised that inode->i_mapping->backing_dev_info
is not used and the supporting code is fine. Until the pointer
will default to NULL, I'd rather it points to the correct thing
regardless.

At least for future infrastructure coder it is a clear indication
of where are the key points that inodes are initialized.
I know because it took me time to find this out.

Signed-off-by: Boaz Harrosh <Boaz Harrosh bharrosh@panasas.com>
---
 fs/exofs/inode.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index 24ab327..0ba9886 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -1030,6 +1030,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
 		memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
 	}
 
+	inode->i_mapping->backing_dev_info = sb->s_bdi;
 	if (S_ISREG(inode->i_mode)) {
 		inode->i_op = &exofs_file_inode_operations;
 		inode->i_fop = &exofs_file_operations;
@@ -1129,6 +1130,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
 
 	sbi = sb->s_fs_info;
 
+	inode->i_mapping->backing_dev_info = sb->s_bdi;
 	sb->s_dirt = 1;
 	inode_init_owner(inode, dir, mode);
 	inode->i_ino = sbi->s_nextid++;
-- 
1.7.2.3