kern_threads.c.. upcall question..

[Julian Elischer]

In kern_threads.c, in function thread_export_context()
it first does a copyin() of the
context storage area. I think this is un-needed (and a complete waste of
cycles) but I am not sure if there is some strange condition
regarding floating point registers or something that may want this..

Dan, Jon, David?
do any of you have a good reason why I shouldn't remove the copyin().??