block: remove the lock argument to blk_alloc_queue_node

With the legacy request path gone there is no real need to override the
queue_lock.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-core.c

@@ -393,7 +393,7 @@ EXPORT_SYMBOL(blk_cleanup_queue);
 
 struct request_queue *blk_alloc_queue(gfp_t gfp_mask)
 {
-	return blk_alloc_queue_node(gfp_mask, NUMA_NO_NODE, NULL);
+	return blk_alloc_queue_node(gfp_mask, NUMA_NO_NODE);
 }
 EXPORT_SYMBOL(blk_alloc_queue);
 
@@ -473,17 +473,8 @@ static void blk_rq_timed_out_timer(struct timer_list *t)
  * blk_alloc_queue_node - allocate a request queue
  * @gfp_mask: memory allocation flags
  * @node_id: NUMA node to allocate memory from
- * @lock: For legacy queues, pointer to a spinlock that will be used to e.g.
- *        serialize calls to the legacy .request_fn() callback. Ignored for
- *	  blk-mq request queues.
- *
- * Note: pass the queue lock as the third argument to this function instead of
- * setting the queue lock pointer explicitly to avoid triggering a sporadic
- * crash in the blkcg code. This function namely calls blkcg_init_queue() and
- * the queue lock pointer must be set before blkcg_init_queue() is called.
  */
-struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id,
-					   spinlock_t *lock)
+struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
 {
 	struct request_queue *q;
 	int ret;
@@ -534,8 +525,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id,
 #endif
 	mutex_init(&q->sysfs_lock);
 	spin_lock_init(&q->__queue_lock);
-
-	q->queue_lock = lock ? : &q->__queue_lock;
+	q->queue_lock = &q->__queue_lock;
 
 	init_waitqueue_head(&q->mq_freeze_wq);
 

block/blk-mq.c

@@ -2548,7 +2548,7 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
 {
 	struct request_queue *uninit_q, *q;
 
-	uninit_q = blk_alloc_queue_node(GFP_KERNEL, set->numa_node, NULL);
+	uninit_q = blk_alloc_queue_node(GFP_KERNEL, set->numa_node);
 	if (!uninit_q)
 		return ERR_PTR(-ENOMEM);
 

drivers/block/drbd/drbd_main.c

@@ -2792,7 +2792,7 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 
 	drbd_init_set_defaults(device);
 
-	q = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE, NULL);
+	q = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE);
 	if (!q)
 		goto out_no_q;
 	device->rq_queue = q;

drivers/block/null_blk_main.c

@@ -1659,8 +1659,7 @@ static int null_add_dev(struct nullb_device *dev)
 		}
 		null_init_queues(nullb);
 	} else if (dev->queue_mode == NULL_Q_BIO) {
-		nullb->q = blk_alloc_queue_node(GFP_KERNEL, dev->home_node,
-						NULL);
+		nullb->q = blk_alloc_queue_node(GFP_KERNEL, dev->home_node);
 		if (!nullb->q) {
 			rv = -ENOMEM;
 			goto out_cleanup_queues;

drivers/block/umem.c

@@ -888,7 +888,7 @@ static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 	card->biotail = &card->bio;
 	spin_lock_init(&card->lock);
 
-	card->queue = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE, NULL);
+	card->queue = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE);
 	if (!card->queue)
 		goto failed_alloc;
 

drivers/lightnvm/core.c

@@ -389,7 +389,7 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 		goto err_dev;
 	}
 
-	tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node, NULL);
+	tqueue = blk_alloc_queue_node(GFP_KERNEL, dev->q->node);
 	if (!tqueue) {
 		ret = -ENOMEM;
 		goto err_disk;

drivers/md/dm.c

@@ -1896,7 +1896,7 @@ static struct mapped_device *alloc_dev(int minor)
 	INIT_LIST_HEAD(&md->table_devices);
 	spin_lock_init(&md->uevent_lock);
 
-	md->queue = blk_alloc_queue_node(GFP_KERNEL, numa_node_id, NULL);
+	md->queue = blk_alloc_queue_node(GFP_KERNEL, numa_node_id);
 	if (!md->queue)
 		goto bad;
 	md->queue->queuedata = md;

drivers/nvdimm/pmem.c

@@ -393,7 +393,7 @@ static int pmem_attach_disk(struct device *dev,
 		return -EBUSY;
 	}
 
-	q = blk_alloc_queue_node(GFP_KERNEL, dev_to_node(dev), NULL);
+	q = blk_alloc_queue_node(GFP_KERNEL, dev_to_node(dev));
 	if (!q)
 		return -ENOMEM;
 

drivers/nvme/host/multipath.c

@@ -276,7 +276,7 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
 	if (!(ctrl->subsys->cmic & (1 << 1)) || !multipath)
 		return 0;
 
-	q = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE, NULL);
+	q = blk_alloc_queue_node(GFP_KERNEL, NUMA_NO_NODE);
 	if (!q)
 		goto out;
 	q->queuedata = head;

include/linux/blkdev.h

@@ -1122,8 +1122,7 @@ extern long nr_blockdev_pages(void);
 
 bool __must_check blk_get_queue(struct request_queue *);
 struct request_queue *blk_alloc_queue(gfp_t);
-struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id,
-					   spinlock_t *lock);
+struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id);
 extern void blk_put_queue(struct request_queue *);
 extern void blk_set_queue_dying(struct request_queue *);