diff --git a/block/genhd.c b/block/genhd.c
index 8c1816d2929e..9fa734cb9cbd 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -497,7 +497,6 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
 		}
 	} else {
 		WARN_ON(disk->minors);
-		WARN_ON(!(disk->flags & (GENHD_FL_EXT_DEVT | GENHD_FL_HIDDEN)));
 
 		ret = blk_alloc_ext_minor();
 		if (ret < 0) {
@@ -506,6 +505,7 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
 		}
 		disk->major = BLOCK_EXT_MAJOR;
 		disk->first_minor = MINOR(ret);
+		disk->flags |= GENHD_FL_EXT_DEVT;
 	}
 
 	disk->flags |= GENHD_FL_UP;
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 504297bdc8bf..ada3e1e66989 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -326,10 +326,6 @@ static struct block_device *add_partition(struct gendisk *disk, int partno,
 	const char *dname;
 	int err;
 
-	/*
-	 * disk_max_parts() won't be zero, either GENHD_FL_EXT_DEVT is set
-	 * or 'minors' is passed to alloc_disk().
-	 */
 	if (partno >= disk_max_parts(disk))
 		return ERR_PTR(-EINVAL);
 
diff --git a/drivers/block/n64cart.c b/drivers/block/n64cart.c
index 47bdf324e962..3dae4b631dea 100644
--- a/drivers/block/n64cart.c
+++ b/drivers/block/n64cart.c
@@ -141,7 +141,7 @@ static int __init n64cart_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	disk->first_minor = 0;
-	disk->flags = GENHD_FL_NO_PART_SCAN | GENHD_FL_EXT_DEVT;
+	disk->flags = GENHD_FL_NO_PART_SCAN;
 	disk->fops = &n64cart_fops;
 	disk->private_data = &pdev->dev;
 	strcpy(disk->disk_name, "n64cart");
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
index 40a948c08a0b..e7dc539fc0ac 100644
--- a/drivers/lightnvm/core.c
+++ b/drivers/lightnvm/core.c
@@ -383,7 +383,6 @@ static int nvm_create_tgt(struct nvm_dev *dev, struct nvm_ioctl_create *create)
 	}
 
 	strlcpy(tdisk->disk_name, create->tgtname, sizeof(tdisk->disk_name));
-	tdisk->flags = GENHD_FL_EXT_DEVT;
 	tdisk->major = 0;
 	tdisk->first_minor = 0;
 	tdisk->fops = tt->bops;
diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index 8004dd64d09a..0bacf4268f83 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -2136,7 +2136,6 @@ static int msb_init_disk(struct memstick_dev *card)
 	msb->disk->fops = &msb_bdops;
 	msb->disk->private_data = msb;
 	msb->disk->queue = msb->queue;
-	msb->disk->flags |= GENHD_FL_EXT_DEVT;
 
 	capacity = msb->pages_in_block * msb->logical_block_count;
 	capacity *= (msb->page_size / 512);
diff --git a/drivers/nvdimm/blk.c b/drivers/nvdimm/blk.c
index 7b9556291eb1..7ba446d224fb 100644
--- a/drivers/nvdimm/blk.c
+++ b/drivers/nvdimm/blk.c
@@ -267,7 +267,6 @@ static int nsblk_attach_disk(struct nd_namespace_blk *nsblk)
 	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);
 
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 18a267d5073f..1741a7b0b30f 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -1537,7 +1537,6 @@ static int btt_blk_init(struct btt *btt)
 	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);
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index ed10a8b66068..968b8483c763 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -477,7 +477,6 @@ static int pmem_attach_disk(struct device *dev,
 
 	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)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 762125f2905f..24bcae88587a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3699,7 +3699,6 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid,
 	disk->fops = &nvme_bdev_ops;
 	disk->private_data = ns;
 	disk->queue = ns->queue;
-	disk->flags = GENHD_FL_EXT_DEVT;
 	/*
 	 * Without the multipath code enabled, multiple controller per
 	 * subsystems are visible as devices and thus we cannot use the
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index f81871c7128a..a5d02f236cca 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -462,7 +462,6 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head)
 	head->disk->fops = &nvme_ns_head_ops;
 	head->disk->private_data = head;
 	head->disk->queue = q;
-	head->disk->flags = GENHD_FL_EXT_DEVT;
 	sprintf(head->disk->disk_name, "nvme%dn%d",
 			ctrl->subsys->instance, head->instance);
 	return 0;