[XFS] embededd struct xfs_imap into xfs_inode

Most uses of struct xfs_imap are to map and inode to a buffer.  To avoid
copying around the inode location information we should just embedd a
strcut xfs_imap into the xfs_inode.  To make sure it doesn't bloat an
inode the im_len is changed to a ushort, which is fine as that's what
the users exepect anyway.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Niv Sardi <xaiki@sgi.com>
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index c431181..977c4ae 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -942,9 +942,9 @@
 
 	iip->ili_format.ilf_type = XFS_LI_INODE;
 	iip->ili_format.ilf_ino = ip->i_ino;
-	iip->ili_format.ilf_blkno = ip->i_blkno;
-	iip->ili_format.ilf_len = ip->i_len;
-	iip->ili_format.ilf_boffset = ip->i_boffset;
+	iip->ili_format.ilf_blkno = ip->i_imap.im_blkno;
+	iip->ili_format.ilf_len = ip->i_imap.im_len;
+	iip->ili_format.ilf_boffset = ip->i_imap.im_boffset;
 }
 
 /*