2010.01.13
I wrote this to return both xtime and ktime via do_gettimeofday.
I don't understand the difference. 

2010.01.13
Wow. Again it worked out of the box! copy_to_user and the
whole lot. Note: copy_to_user does the access_ok (the
old verify_area).

2010.01.13
First attempt to return a struct through a reference parameter
Derived from an earlier failure to return a struct on the
stack. See notes below.

2010.01.13
NOTE NOTE   Returning struct won't work because syscall
returns a long and so I get a type incompatability trying
to return a struct.  The return value of syscall
(or system calls in general) is really only for error messages.

2010.01.13
This program derived from mod-syscall-xtimefun but now return
an xtime struct on the stack instead of just a long xtime.tv_sec.