Btrfs: Add delayed allocation to the extent based page tree code

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 7b7c32c..7da9553 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -83,6 +83,7 @@
 	bi->location.offset = 0;
 	bi->location.flags = 0;
 	bi->root = tree_root;
+
 	btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY);
 
 	if (!inode) {