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>

1 files changed, 2 insertions, 2 deletions

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 4553245d9317..5eed6a76721d 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -310,7 +310,7 @@ static struct throtl_grp * throtl_get_tg(struct throtl_data *td)
         struct request_queue *q = td->queue;
 
         /* no throttling for dead queue */
-        if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+        if (unlikely(blk_queue_dead(q)))
                 return NULL;
 
         rcu_read_lock();
@@ -335,7 +335,7 @@ static struct throtl_grp * throtl_get_tg(struct throtl_data *td)
         spin_lock_irq(q->queue_lock);
 
         /* Make sure @q is still alive */
-        if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+        if (unlikely(blk_queue_dead(q))) {
                 kfree(tg);
                 return NULL;
         }