The first parameter is the list of structure names of interest,
and should be the same as was passed to {!load_structures}. *)
-val get_fields : (info * structure) list -> (string * f_type) list
+val get_fields : (info * structure) list -> (string * (f_type * bool)) list
(** This gets a complete list of fields which have appeared in
- any kernel version, and the type of those fields.
+ any kernel version.
+
+ The return list contains [(field_name, (field_type,
+ always_present))] where [always_present] is a boolean flag which
+ is true if the field is present in every kernel version we
+ examined.
Fields must not change type between kernel versions - if
so this function prints an error and exits. (We may support