From: Bernard Pidoux F6BVP <redacted>
Date: Fri, 20 Jun 2008 15:17:39 +0200

The second solution is to declare a new structure

* new ax25 info struct */
struct ax25_info_long_timers_struct {

 ...

adding another case SIOCAX25GETNEWINFO
that would be defined
#define SIOCAX25GETNEWINFO         (SIOCPROTOPRIVATE+14)

and trigger warning message by calls to SIOCAX25GETINFOOLD and
SIOCAX25GETINFO.

It that the right way to do it ?

Yes.