tree f25b06ee61ffa8b000a45d0ec5f8a92ebb67f0ce
parent 152587deb8903c0edf483a5b889f975bc6bea7e0
author  <jejb@titanic.il.steeleye.com> 1113341889 -0500
committer James Bottomley <jejb@titanic> 1113700234 -0500

updates for CFQ oops fix

- add a comment to the device structure that the device_busy field
  is now protected by the request_queue->queue_lock
- null out sdev->request_queue after the queue is released to trap
  any (and there shouldn't be any) use after the queue is freed.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>