diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
index 0d112b9..d85673f 100644
--- a/arch/powerpc/sysdev/axonram.c
+++ b/arch/powerpc/sysdev/axonram.c
@@ -139,17 +139,17 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
 
 /**
  * axon_ram_direct_access - direct_access() method for block device
- * @device, @sector, @data: see block_device_operations method
+ * @dax: see block_device_operations method
  */
 static long
-axon_ram_direct_access(struct block_device *device, sector_t sector,
-		       void __pmem **kaddr, pfn_t *pfn)
+axon_ram_direct_access(struct block_device *device, struct blk_dax_ctl *dax)
 {
+	sector_t sector = get_start_sect(device) + dax->sector;
 	struct axon_ram_bank *bank = device->bd_disk->private_data;
 	loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT;
 
-	*kaddr = (void __pmem __force *) bank->io_addr + offset;
-	*pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV);
+	dax->addr = (void __pmem __force *) bank->io_addr + offset;
+	dax->pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV);
 	return bank->size - offset;
 }
 
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index f7ecc28..e3e4780 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -380,9 +380,10 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector,
 }
 
 #ifdef CONFIG_BLK_DEV_RAM_DAX
-static long brd_direct_access(struct block_device *bdev, sector_t sector,
-			void __pmem **kaddr, pfn_t *pfn)
+static long brd_direct_access(struct block_device *bdev,
+		struct blk_dax_ctl *dax)
 {
+	sector_t sector = get_start_sect(bdev) + dax->sector;
 	struct brd_device *brd = bdev->bd_disk->private_data;
 	struct page *page;
 
@@ -391,8 +392,8 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector,
 	page = brd_insert_page(brd, sector);
 	if (!page)
 		return -ENOSPC;
-	*kaddr = (void __pmem *)page_address(page);
-	*pfn = page_to_pfn_t(page);
+	dax->addr = (void __pmem *)page_address(page);
+	dax->pfn = page_to_pfn_t(page);
 
 	return PAGE_SIZE;
 }
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index ca5721c..da10554 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -167,14 +167,15 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector,
 	return rc;
 }
 
-static long pmem_direct_access(struct block_device *bdev, sector_t sector,
-		      void __pmem **kaddr, pfn_t *pfn)
+static long pmem_direct_access(struct block_device *bdev,
+		struct blk_dax_ctl *dax)
 {
+	sector_t sector = get_start_sect(bdev) + dax->sector;
 	struct pmem_device *pmem = bdev->bd_disk->private_data;
 	resource_size_t offset = sector * 512 + pmem->data_offset;
 
-	*kaddr = pmem->virt_addr + offset;
-	*pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
+	dax->addr = pmem->virt_addr + offset;
+	dax->pfn = phys_to_pfn_t(pmem->phys_addr + offset, pmem->pfn_flags);
 
 	return pmem->size - pmem->pfn_pad - offset;
 }
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 1bce9cf..5719c30 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -30,8 +30,8 @@ static int dcssblk_open(struct block_device *bdev, fmode_t mode);
 static void dcssblk_release(struct gendisk *disk, fmode_t mode);
 static blk_qc_t dcssblk_make_request(struct request_queue *q,
 						struct bio *bio);
-static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum,
-			 void __pmem **kaddr, pfn_t *pfn);
+static long dcssblk_direct_access(struct block_device *bdev,
+		struct blk_dax_ctl *dax)
 
 static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0";
 
@@ -882,9 +882,9 @@ fail:
 }
 
 static long
-dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
-			void __pmem **kaddr, pfn_t *pfn)
+dcssblk_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax)
 {
+	sector_t secnum = get_start_sect(bdev) + dax->sector;
 	struct dcssblk_dev_info *dev_info;
 	unsigned long offset, dev_sz;
 
@@ -893,8 +893,8 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum,
 		return -ENODEV;
 	dev_sz = dev_info->end - dev_info->start;
 	offset = secnum * 512;
-	*kaddr = (void __pmem *) (dev_info->start + offset);
-	*pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV);
+	dax->addr = (void __pmem *) (dev_info->start + offset);
+	dax->pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV);
 
 	return dev_sz - offset;
 }
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 3172c4e..c5837fa 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -488,7 +488,7 @@ long bdev_direct_access(struct block_device *bdev, struct blk_dax_ctl *dax)
 	sector += get_start_sect(bdev);
 	if (sector % (PAGE_SIZE / 512))
 		return -EINVAL;
-	avail = ops->direct_access(bdev, sector, &dax->addr, &dax->pfn);
+	avail = ops->direct_access(bdev, dax);
 	if (!avail)
 		return -ERANGE;
 	if (avail > 0 && avail & ~PAGE_MASK)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 7e5d7e0..92f8a1f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1656,8 +1656,7 @@ struct block_device_operations {
 	int (*rw_page)(struct block_device *, sector_t, struct page *, int rw);
 	int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
 	int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
-	long (*direct_access)(struct block_device *, sector_t, void __pmem **,
-			pfn_t *);
+	long (*direct_access)(struct block_device *, struct blk_dax_ctl *dax);
 	unsigned int (*check_events) (struct gendisk *disk,
 				      unsigned int clearing);
 	/* ->media_changed() is DEPRECATED, use ->check_events() instead */
