block: add blk_queue_dead()
There are a number of QUEUE_FLAG_DEAD tests. Add blk_queue_dead()
macro and use it.
This patch doesn't introduce any functional difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk.h b/block/blk.h
index 3f6551b..e38691d 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -85,7 +85,7 @@
q->flush_queue_delayed = 1;
return NULL;
}
- if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags) ||
+ if (unlikely(blk_queue_dead(q)) ||
!q->elevator->ops->elevator_dispatch_fn(q, 0))
return NULL;
}