[openib-general] Re: [PATCH] sockaddr_ll change for IPoIB interface

[Roland Dreier]

    Tom> Do we need backward compatibility?

    Hal> I'm not sure but I think this was a recommendation from
    Hal> Roland.

Yes, of course we need backward compatibility.  We can't put a change
into the kernel that breaks userspace binaries.

For example, the old Fedora binary of arping has to continue to work,
even if you use a new kernel.

 - R.