-/**
- * Loop over all nodes in an rbtree.
- *
- * \param t Pointer to an open osl table.
- * \param col_num The column to use for iterating over the elements.
- * \param private_data Pointer that gets passed to \a func.
- * \param func The function to be called for each node in the rbtree.
- *
- * This function does an in-order walk of the rbtree associated with \a
- * col_num. It is an error if the \p OSL_RBTREE flag is not set for this
- * column. For each node in the rbtree, the given function \a func is called
- * with two pointers as arguments: The first osl_row* argument points to the
- * row that contains the object corresponding to the rbtree node currently
- * traversed, and the \a private_data pointer is passed verbatim to \a func as the
- * second argument. The loop terminates either if \a func returns a negative
- * value, or if all nodes of the tree have been visited.
- *
- *
- * \return Positive on success, negative on errors. If the termination of the
- * loop was caused by \a func returning a negative value, this value is
- * returned.
- *
- * \sa osl_storage_flags, osl_rbtree_loop_reverse(), osl_compare_func.
- */
-int osl_rbtree_loop(const struct osl_table *t, unsigned col_num,