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>

5 files changed, 9 insertions, 9 deletions

diff --git a/block/blk-core.c b/block/blk-core.c
index 435af2378614..b5ed4f4a8d96 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -608,7 +608,7 @@ EXPORT_SYMBOL(blk_init_allocated_queue_node);
 
 int blk_get_queue(struct request_queue *q)
 {
-        if (likely(!test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+        if (likely(!blk_queue_dead(q))) {
                 kobject_get(&q->kobj);
                 return 0;
         }
@@ -755,7 +755,7 @@ static struct request *get_request(struct request_queue *q, int rw_flags,
         const bool is_sync = rw_is_sync(rw_flags) != 0;
         int may_queue;
 
-        if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+        if (unlikely(blk_queue_dead(q)))
                 return NULL;
 
         may_queue = elv_may_queue(q, rw_flags);
@@ -875,7 +875,7 @@ static struct request *get_request_wait(struct request_queue *q, int rw_flags,
                 struct io_context *ioc;
                 struct request_list *rl = &q->rq;
 
-                if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)))
+                if (unlikely(blk_queue_dead(q)))
                         return NULL;
 
                 prepare_to_wait_exclusive(&rl->wait[is_sync], &wait,
diff --git a/block/blk-exec.c b/block/blk-exec.c
index a1ebceb332f9..60532852b3ab 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -50,7 +50,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
 {
         int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
 
-        if (unlikely(test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))) {
+        if (unlikely(blk_queue_dead(q))) {
                 rq->errors = -ENXIO;
                 if (rq->end_io)
                         rq->end_io(rq, rq->errors);
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index e7f9f657f105..f0b2ca8f66d0 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -425,7 +425,7 @@ queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
         if (!entry->show)
                 return -EIO;
         mutex_lock(&q->sysfs_lock);
-        if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)) {
+        if (blk_queue_dead(q)) {
                 mutex_unlock(&q->sysfs_lock);
                 return -ENOENT;
         }
@@ -447,7 +447,7 @@ queue_attr_store(struct kobject *kobj, struct attribute *attr,
 
         q = container_of(kobj, struct request_queue, kobj);
         mutex_lock(&q->sysfs_lock);
-        if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags)) {
+        if (blk_queue_dead(q)) {
                 mutex_unlock(&q->sysfs_lock);
                 return -ENOENT;
         }
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;
         }
diff --git a/block/blk.h b/block/blk.h
index 3f6551b3c92d..e38691dbb329 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -85,7 +85,7 @@ static inline struct request *__elv_next_request(struct request_queue *q)
                         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;
         }