dm vdo: add missing spin_lock_init

Signed-off-by: Ken Raeburn <raeburn@redhat.com>
Signed-off-by: Matthew Sakai <msakai@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org

Author: raeburn

drivers/md/dm-vdo/dedupe.c

@@ -2178,6 +2178,7 @@ static int initialize_index(struct vdo *vdo, struct hash_zones *zones)
 
 	vdo_set_dedupe_index_timeout_interval(vdo_dedupe_index_timeout_interval);
 	vdo_set_dedupe_index_min_timer_interval(vdo_dedupe_index_min_timer_interval);
+	spin_lock_init(&zones->lock);
 
 	/*
 	 * Since we will save up the timeouts that would have been reported but were ratelimited,