Question on timestamping

Hello all,
I had a question regarding kernel timestamping.  I see definitions for
SO_TIMESTAMPING_NEW in networking options to allow use of time
structures containing 64bit timestamps.  However, I don't see any way
for skbuff timestamps to pass around structures with 64 bits as the
skb_shared_hwstamps use a typedef ktime_t which stacks the seconds and
nanoseconds into a single 64bit value.
I am not sure who maintains this section of the code.  Any ideas?

thanks...Greg