[openib-general] Processes not exiting on SVN7946

[Roland Dreier]

    Arlin> I see the same thing running the uDAPL test
    Arlin> (dapl/test/dtest). I am running a 2.6.16 kernel and svn8805
    Arlin> and it appears to be deadlocked (uninterruptible sleep) in
    Arlin> the ibv_destroy_cq() call.  This all worked fine on
    Arlin> svn7843; my last update on these systems.

Hmm, any further clue where in ibv_destroy_cq() it's stuck?  Is it
doing down_write() or something?

This is probably fallout from my kill-ib_uverbs_idr_mutex change...

 - R.