diff --git a/drivers/dax/dax.h b/drivers/dax/dax.h
index 246a24d..617bbc2 100644
--- a/drivers/dax/dax.h
+++ b/drivers/dax/dax.h
@@ -13,7 +13,9 @@
 #ifndef __DAX_H__
 #define __DAX_H__
 struct dax_device;
-struct dax_device *alloc_dax(void *private, const char *host);
+struct dax_operations;
+struct dax_device *alloc_dax(void *private, const char *host,
+		const struct dax_operations *ops);
 void put_dax(struct dax_device *dax_dev);
 bool dax_alive(struct dax_device *dax_dev);
 void kill_dax(struct dax_device *dax_dev);
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index db68f4f..a0db055 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -645,7 +645,11 @@
 		goto err_id;
 	}
 
-	dax_dev = alloc_dax(dev_dax, NULL);
+	/*
+	 * No 'host' or dax_operations since there is no access to this
+	 * device outside of mmap of the resulting character device.
+	 */
+	dax_dev = alloc_dax(dev_dax, NULL, NULL);
 	if (!dax_dev)
 		goto err_dax;
 
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 8d44667..1a58542 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -17,6 +17,7 @@
 #include <linux/cdev.h>
 #include <linux/hash.h>
 #include <linux/slab.h>
+#include <linux/dax.h>
 #include <linux/fs.h>
 
 static int nr_dax = CONFIG_NR_DEV_DAX;
@@ -61,6 +62,7 @@
 	const char *host;
 	void *private;
 	bool alive;
+	const struct dax_operations *ops;
 };
 
 bool dax_alive(struct dax_device *dax_dev)
@@ -208,7 +210,8 @@
 	spin_unlock(&dax_host_lock);
 }
 
-struct dax_device *alloc_dax(void *private, const char *__host)
+struct dax_device *alloc_dax(void *private, const char *__host,
+		const struct dax_operations *ops)
 {
 	struct dax_device *dax_dev;
 	const char *host;
@@ -229,6 +232,7 @@
 		goto err_dev;
 
 	dax_add_host(dax_dev, host);
+	dax_dev->ops = ops;
 	dax_dev->private = private;
 	return dax_dev;
 
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 9b2d5ba..74ebb92 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -7,6 +7,16 @@
 #include <asm/pgtable.h>
 
 struct iomap_ops;
+struct dax_device;
+struct dax_operations {
+	/*
+	 * direct_access: translate a device-relative
+	 * logical-page-offset into an absolute physical pfn. Return the
+	 * number of pages available for DAX at that pfn.
+	 */
+	long (*direct_access)(struct dax_device *, pgoff_t, long,
+			void **, pfn_t *);
+};
 
 int dax_read_lock(void);
 void dax_read_unlock(int id);