sched/rt: Fix task stack corruption under __ARCH_WANT_INTERRUPTS_ON_CTXSW

[deliverable/linux.git] / block / blk-sysfs.c

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 60fda88c57f0dd83e930d3859ab0626407a01fd2..cf150011d808bc71fee8ff894387de0581235f56 100644 (file)
--- 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;
        }
@@ -457,11 +457,11 @@ queue_attr_store(struct kobject *kobj, struct attribute *attr,
 }
 
 /**
- * blk_cleanup_queue: - release a &struct request_queue when it is no longer needed
- * @kobj:    the kobj belonging of the request queue to be released
+ * blk_release_queue: - release a &struct request_queue when it is no longer needed
+ * @kobj:    the kobj belonging to the request queue to be released
  *
  * Description:
- *     blk_cleanup_queue is the pair to blk_init_queue() or
+ *     blk_release_queue is the pair to blk_init_queue() or
  *     blk_queue_make_request().  It should be called when a request queue is
  *     being released; typically when a block device is being de-registered.
  *     Currently, its primary task it to free all the &struct request
@@ -479,8 +479,12 @@ static void blk_release_queue(struct kobject *kobj)
 
        blk_sync_queue(q);
 
-       if (q->elevator)
+       if (q->elevator) {
+               spin_lock_irq(q->queue_lock);
+               ioc_clear_queue(q);
+               spin_unlock_irq(q->queue_lock);
                elevator_exit(q->elevator);
+       }
 
        blk_throtl_exit(q);
 
@@ -490,9 +494,12 @@ static void blk_release_queue(struct kobject *kobj)
        if (q->queue_tags)
                __blk_queue_free_tags(q);
 
+       blk_throtl_release(q);
        blk_trace_shutdown(q);
 
        bdi_destroy(&q->backing_dev_info);
+
+       ida_simple_remove(&blk_queue_ida, q->id);
        kmem_cache_free(blk_requestq_cachep, q);
 }