Again, more work to do here..

Remove prototype. It was wrong anyway.

More to do, but its a beginning.

if ki_users = 1, we don't do the wakeup, which seems wrong.

These copies already did a verify_area above.

- Remove unneeded breaks
- Fix double spin_unlock_irqrestore problem

Achieves the same result.  From Lenz Grimmer at Mysql AG

Plus with a little codeshuffling, we can do away with the
prototypes.