Change 2:
split the poll_table structure into 2 parts:
One global part with just a function pointer and a priv variable.
The 2nd part is user specific:
for __pollwait: the poll table and the error variable
for ep_ptable_queue_proc: the pointer to the eventpoll data.

This change is a prerequisite for the next patch, that embedds a few 
waitqueues in the __pollwait specific part of the poll structure.

--
    Manfred