Merge tag 'for-5.14/block-2021-06-29' of git://git.kernel.dk/linux-block

Pull core block updates from Jens Axboe:

 - disk events cleanup (Christoph)

 - gendisk and request queue allocation simplifications (Christoph)

 - bdev_disk_changed cleanups (Christoph)

 - IO priority improvements (Bart)

 - Chained bio completion trace fix (Edward)

 - blk-wbt fixes (Jan)

 - blk-wbt enable/disable fix (Zhang)

 - Scheduler dispatch improvements (Jan, Ming)

 - Shared tagset scheduler improvements (John)

 - BFQ updates (Paolo, Luca, Pietro)

 - BFQ lock inversion fix (Jan)

 - Documentation improvements (Kir)

 - CLONE_IO block cgroup fix (Tejun)

 - Remove of ancient and deprecated block dump feature (zhangyi)

 - Discard merge fix (Ming)

 - Misc fixes or followup fixes (Colin, Damien, Dan, Long, Max, Thomas,
   Yang)

* tag 'for-5.14/block-2021-06-29' of git://git.kernel.dk/linux-block: (129 commits)
  block: fix discard request merge
  block/mq-deadline: Remove a WARN_ON_ONCE() call
  blk-mq: update hctx->dispatch_busy in case of real scheduler
  blk: Fix lock inversion between ioc lock and bfqd lock
  bfq: Remove merged request already in bfq_requests_merged()
  block: pass a gendisk to bdev_disk_changed
  block: move bdev_disk_changed
  block: add the events* attributes to disk_attrs
  block: move the disk events code to a separate file
  block: fix trace completion for chained bio
  block/partitions/msdos: Fix typo inidicator -> indicator
  block, bfq: reset waker pointer with shared queues
  block, bfq: check waker only for queues with no in-flight I/O
  block, bfq: avoid delayed merge of async queues
  block, bfq: boost throughput by extending queue-merging times
  block, bfq: consider also creation time in delayed stable merge
  block, bfq: fix delayed stable merge check
  block, bfq: let also stably merged queues enjoy weight raising
  blk-wbt: make sure throttle is enabled properly
  blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
  ...

4 files changed, 20 insertions, 55 deletions

diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 7b9556291eb1..088d3dd6f6fa 100644
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -228,49 +228,34 @@ static const struct block_device_operations nd_blk_fops = {
 	.submit_bio =  nd_blk_submit_bio,
 };
 
-static void nd_blk_release_queue(void *q)
-{
-	blk_cleanup_queue(q);
-}
-
 static void nd_blk_release_disk(void *disk)
 {
 	del_gendisk(disk);
-	put_disk(disk);
+	blk_cleanup_disk(disk);
 }
 
 static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
 {
 	struct device *dev = &nsblk->common.dev;
 	resource_size_t available_disk_size;
-	struct request_queue *q;
 	struct gendisk *disk;
 	u64 internal_nlba;
 
 	internal_nlba = div_u64(nsblk->size, nsblk_internal_lbasize(nsblk));
 	available_disk_size = internal_nlba * nsblk_sector_size(nsblk);
 
-	q = blk_alloc_queue(NUMA_NO_NODE);
-	if (!q)
-		return -ENOMEM;
-	if (devm_add_action_or_reset(dev, nd_blk_release_queue, q))
-		return -ENOMEM;
-
-	blk_queue_max_hw_sectors(q, UINT_MAX);
-	blk_queue_logical_block_size(q, nsblk_sector_size(nsblk));
-	blk_queue_flag_set(QUEUE_FLAG_NONROT, q);
-
-	disk = alloc_disk(0);
+	disk = blk_alloc_disk(NUMA_NO_NODE);
 	if (!disk)
 		return -ENOMEM;
 
-	disk->first_minor	= 0;
 	disk->fops		= &nd_blk_fops;
-	disk->queue		= q;
-	disk->flags		= GENHD_FL_EXT_DEVT;
 	disk->private_data	= nsblk;
 	nvdimm_namespace_disk_name(&nsblk->common, disk->disk_name);
 
+	blk_queue_max_hw_sectors(disk->queue, UINT_MAX);
+	blk_queue_logical_block_size(disk->queue, nsblk_sector_size(nsblk));
+	blk_queue_flag_set(QUEUE_FLAG_NONROT, disk->queue);
+
 	if (devm_add_action_or_reset(dev, nd_blk_release_disk, disk))
 		return -ENOMEM;
 
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 18a267d5073f..92dec4952297 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1521,35 +1521,25 @@ static int btt_blk_init(struct btt *btt)
 	struct nd_btt *nd_btt = btt->nd_btt;
 	struct nd_namespace_common *ndns = nd_btt->ndns;
 
-	/* create a new disk and request queue for btt */
-	btt->btt_queue = blk_alloc_queue(NUMA_NO_NODE);
-	if (!btt->btt_queue)
+	btt->btt_disk = blk_alloc_disk(NUMA_NO_NODE);
+	if (!btt->btt_disk)
 		return -ENOMEM;
 
-	btt->btt_disk = alloc_disk(0);
-	if (!btt->btt_disk) {
-		blk_cleanup_queue(btt->btt_queue);
-		return -ENOMEM;
-	}
-
 	nvdimm_namespace_disk_name(ndns, btt->btt_disk->disk_name);
 	btt->btt_disk->first_minor = 0;
 	btt->btt_disk->fops = &btt_fops;
 	btt->btt_disk->private_data = btt;
-	btt->btt_disk->queue = btt->btt_queue;
-	btt->btt_disk->flags = GENHD_FL_EXT_DEVT;
 
-	blk_queue_logical_block_size(btt->btt_queue, btt->sector_size);
-	blk_queue_max_hw_sectors(btt->btt_queue, UINT_MAX);
-	blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_queue);
+	blk_queue_logical_block_size(btt->btt_disk->queue, btt->sector_size);
+	blk_queue_max_hw_sectors(btt->btt_disk->queue, UINT_MAX);
+	blk_queue_flag_set(QUEUE_FLAG_NONROT, btt->btt_disk->queue);
 
 	if (btt_meta_size(btt)) {
 		int rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
 
 		if (rc) {
 			del_gendisk(btt->btt_disk);
-			put_disk(btt->btt_disk);
-			blk_cleanup_queue(btt->btt_queue);
+			blk_cleanup_disk(btt->btt_disk);
 			return rc;
 		}
 	}
@@ -1564,8 +1554,7 @@ static int btt_blk_init(struct btt *btt)
 static void btt_blk_cleanup(struct btt *btt)
 {
 	del_gendisk(btt->btt_disk);
-	put_disk(btt->btt_disk);
-	blk_cleanup_queue(btt->btt_queue);
+	blk_cleanup_disk(btt->btt_disk);
 }
 
 /**
diff --git a/drivers/nvdimm/btt.h b/drivers/nvdimm/btt.h
index aa53e0b769bd..0c76c0333f6e 100644
--- a/drivers/nvdimm/btt.h
+++ b/drivers/nvdimm/btt.h
@@ -201,7 +201,6 @@ struct badblocks;
 /**
  * struct btt - handle for a BTT instance
  * @btt_disk:		Pointer to the gendisk for BTT device
- * @btt_queue:		Pointer to the request queue for the BTT device
  * @arena_list:		Head of the list of arenas
  * @debugfs_dir:	Debugfs dentry
  * @nd_btt:		Parent nd_btt struct
@@ -219,7 +218,6 @@ struct badblocks;
  */
 struct btt {
 	struct gendisk *btt_disk;
-	struct request_queue *btt_queue;
 	struct list_head arena_list;
 	struct dentry *debugfs_dir;
 	struct nd_btt *nd_btt;
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index ed10a8b66068..1e0615b8565e 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -335,10 +335,9 @@ static const struct attribute_group *pmem_attribute_groups[] = {
 
 static void pmem_pagemap_cleanup(struct dev_pagemap *pgmap)
 {
-	struct request_queue *q =
-		container_of(pgmap->ref, struct request_queue, q_usage_counter);
+	struct pmem_device *pmem = pgmap->owner;
 
-	blk_cleanup_queue(q);
+	blk_cleanup_disk(pmem->disk);
 }
 
 static void pmem_release_queue(void *pgmap)
@@ -361,7 +360,6 @@ static void pmem_release_disk(void *__pmem)
 	kill_dax(pmem->dax_dev);
 	put_dax(pmem->dax_dev);
 	del_gendisk(pmem->disk);
-	put_disk(pmem->disk);
 }
 
 static const struct dev_pagemap_ops fsdax_pagemap_ops = {
@@ -422,10 +420,13 @@ static int pmem_attach_disk(struct device *dev,
 		return -EBUSY;
 	}
 
-	q = blk_alloc_queue(dev_to_node(dev));
-	if (!q)
+	disk = blk_alloc_disk(nid);
+	if (!disk)
 		return -ENOMEM;
+	q = disk->queue;
 
+	pmem->disk = disk;
+	pmem->pgmap.owner = pmem;
 	pmem->pfn_flags = PFN_DEV;
 	pmem->pgmap.ref = &q->q_usage_counter;
 	if (is_nd_pfn(dev)) {
@@ -470,14 +471,7 @@ static int pmem_attach_disk(struct device *dev,
 	if (pmem->pfn_flags & PFN_MAP)
 		blk_queue_flag_set(QUEUE_FLAG_DAX, q);
 
-	disk = alloc_disk_node(0, nid);
-	if (!disk)
-		return -ENOMEM;
-	pmem->disk = disk;
-
 	disk->fops		= &pmem_fops;
-	disk->queue		= q;
-	disk->flags		= GENHD_FL_EXT_DEVT;
 	disk->private_data	= pmem;
 	nvdimm_namespace_disk_name(ndns, disk->disk_name);
 	set_capacity(disk, (pmem->size - pmem->pfn_pad - pmem->data_offset)
@@ -491,7 +485,6 @@ static int pmem_attach_disk(struct device *dev,
 		flags = DAXDEV_F_SYNC;
 	dax_dev = alloc_dax(pmem, disk->disk_name, &pmem_dax_ops, flags);
 	if (IS_ERR(dax_dev)) {
-		put_disk(disk);
 		return PTR_ERR(dax_dev);
 	}
 	dax_write_cache(dax_dev, nvdimm_has_cache(nd_region));