What I was trying to state is that the protocol specific
code does not get to see the length passed from the user.
The protocol specific code would like to look at what
the user passed.
If move_addr_to_user() takes care of all of the issues, there is no
reason for the protocol specific code to know anything about the
user's len at all.
You have to show me a purpose for it to get passed down. What would
it get used for? All the protocol specific could should (and does)
do is provide the data back to the top level routine and
move_addr_to_user() takes care of the remaining details.
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