Found this on Coverty's linux bug database (http://linuxbugsdb.coverity.com).
The function pkt_iosched_process_queue makes a call to bdev_get_queue and
stores the result but never uses it, so it looks like it can be safely
removed.
Signed-off-by: Gabriel A. Devenyi <ace@staticwave.ca>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Peter Osterlund <petero2@telia.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
  */
 static void pkt_iosched_process_queue(struct pktcdvd_device *pd)
 {
-       request_queue_t *q;
 
        if (atomic_read(&pd->iosched.attention) == 0)
                return;
        atomic_set(&pd->iosched.attention, 0);
 
-       q = bdev_get_queue(pd->bdev);
-
        for (;;) {
                struct bio *bio;
                int reads_queued, writes_queued;