Attilio Rao 02b0a160dc Fix some problems introduced with the last descriptors tables locking
patch:
- Do the correct test for ldt allocation
- Drop dt_lock just before to call kmem_free (since it acquires blocking
  locks inside)
- Solve a deadlock with smp_rendezvous() where other CPU will wait
  undefinitively for dt_lock acquisition.
- Add dt_lock in the WITNESS list of spinlocks

While applying these modifies, change the requirement for user_ldt_free()
making that returning without dt_lock held.

Tested by: marcus, tegge
Reviewed by: tegge
Approved by: jeff (mentor)
2007-05-29 18:55:41 +00:00
..
2007-05-25 09:48:20 +00:00
2007-05-15 23:29:57 +00:00
2007-05-05 11:07:52 +00:00
2006-11-28 19:33:28 +00:00
2007-05-21 11:57:36 +00:00