waterDataFluctuationCorrelation rtuDataOperationAnalysis.c 张婷 commit at 2021-02-25

waterDataFluctuationCorrelation/fluctuationCorrelationOfSprayEnd/rtuDataOperationAnalysis.c

@@ -540,3 +540,74 @@ static void blk_release_queue(struct kobject *kobj)
 	bdi_destroy(&q->backing_dev_info);
 
 	ida_simple_remove(&blk_queue_ida, q->id);
+	kmem_cache_free(blk_requestq_cachep, q);
+}
+
+static const struct sysfs_ops queue_sysfs_ops = {
+	.show	= queue_attr_show,
+	.store	= queue_attr_store,
+};
+
+struct kobj_type blk_queue_ktype = {
+	.sysfs_ops	= &queue_sysfs_ops,
+	.default_attrs	= default_attrs,
+	.release	= blk_release_queue,
+};
+
+int blk_register_queue(struct gendisk *disk)
+{
+	int ret;
+	struct device *dev = disk_to_dev(disk);
+	struct request_queue *q = disk->queue;
+
+	if (WARN_ON(!q))
+		return -ENXIO;
+
+	/*
+	 * Initialization must be complete by now.  Finish the initial
+	 * bypass from queue allocation.
+	 */
+	blk_queue_bypass_end(q);
+
+	ret = blk_trace_init_sysfs(dev);
+	if (ret)
+		return ret;
+
+	ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue");
+	if (ret < 0) {
+		blk_trace_remove_sysfs(dev);
+		return ret;
+	}
+
+	kobject_uevent(&q->kobj, KOBJ_ADD);
+
+	if (!q->request_fn)
+		return 0;
+
+	ret = elv_register_queue(q);
+	if (ret) {
+		kobject_uevent(&q->kobj, KOBJ_REMOVE);
+		kobject_del(&q->kobj);
+		blk_trace_remove_sysfs(dev);
+		kobject_put(&dev->kobj);
+		return ret;
+	}
+
+	return 0;
+}
+
+void blk_unregister_queue(struct gendisk *disk)
+{
+	struct request_queue *q = disk->queue;
+
+	if (WARN_ON(!q))
+		return;
+
+	if (q->request_fn)
+		elv_unregister_queue(q);
+
+	kobject_uevent(&q->kobj, KOBJ_REMOVE);
+	kobject_del(&q->kobj);
+	blk_trace_remove_sysfs(disk_to_dev(disk));
+	kobject_put(&disk_to_dev(disk)->kobj);
+}