christos@astron.com said:
> we need binary compatibility for the syscall and the clockctl ioctl so
> that ntpd binaries don't break

It is just the syscall. clockctl(4) doesn't use ntptimeval but
"struct timex" which doesn't change. There are some additional
flags used with timecounter kernels, but only if a new ntpd
switches it on. This must be dealt with by timecounter enabled
kernels.

> I don't think that the
> emulations need/use the syscall so it should probably be removed.

good - as said ntpd shouldn't be affected, just ntptime

best regards
Matthias