btrfs: Use init_delayed_ref_common in add_delayed_tree_ref

{

	struct btrfs_delayed_tree_ref *full_ref;

	struct btrfs_delayed_ref_root *delayed_refs;

	u64 seq = 0;

	u8 ref_type;

	int ret;

	if (action == BTRFS_ADD_DELAYED_EXTENT)

		action = BTRFS_ADD_DELAYED_REF;

	if (is_fstree(ref_root))

		seq = atomic64_read(&fs_info->tree_mod_seq);

	delayed_refs = &trans->transaction->delayed_refs;

	/* first set the basic ref node struct up */

	refcount_set(&ref->refs, 1);

	ref->bytenr = bytenr;

	ref->num_bytes = num_bytes;

	ref->ref_mod = 1;

	ref->action = action;

	ref->is_head = 0;

	ref->in_tree = 1;

	ref->seq = seq;

	RB_CLEAR_NODE(&ref->ref_node);

	INIT_LIST_HEAD(&ref->add_list);

	full_ref = btrfs_delayed_node_to_tree_ref(ref);

	full_ref->parent = parent;

	full_ref->root = ref_root;

	if (parent)

		ref->type = BTRFS_SHARED_BLOCK_REF_KEY;

	        ref_type = BTRFS_SHARED_BLOCK_REF_KEY;

	else

		ref->type = BTRFS_TREE_BLOCK_REF_KEY;

	        ref_type = BTRFS_TREE_BLOCK_REF_KEY;

	init_delayed_ref_common(fs_info, ref, bytenr, num_bytes, ref_root,

				action, ref_type);

	full_ref->root = ref_root;

	full_ref->parent = parent;

	full_ref->level = level;

	trace_add_delayed_tree_ref(fs_info, ref, full_ref, action);

	trace_add_delayed_tree_ref(fs_info, ref, full_ref,

				   action == BTRFS_ADD_DELAYED_EXTENT ?

				   BTRFS_ADD_DELAYED_REF : action);

	ret = insert_delayed_ref(trans, delayed_refs, head_ref, ref);