1 files changed, 5 insertions, 3 deletions

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 78ad0624cdae..f4c639c0c362 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -130,13 +130,15 @@ typedef int (*dm_busy_fn) (struct dm_target *ti);
  *  < 0 : error
  * >= 0 : the number of bytes accessible at the address
  */
-typedef long (*dm_direct_access_fn) (struct dm_target *ti, sector_t sector,
-                                     void **kaddr, pfn_t *pfn, long size);
+typedef long (*dm_dax_direct_access_fn) (struct dm_target *ti, pgoff_t pgoff,
+                long nr_pages, void **kaddr, pfn_t *pfn);
+#define PAGE_SECTORS (PAGE_SIZE / 512)
 
 void dm_error(const char *message);
 
 struct dm_dev {
         struct block_device *bdev;
+        struct dax_device *dax_dev;
         fmode_t mode;
         char name[16];
 };
@@ -178,7 +180,7 @@ struct target_type {
         dm_busy_fn busy;
         dm_iterate_devices_fn iterate_devices;
         dm_io_hints_fn io_hints;
-        dm_direct_access_fn direct_access;
+        dm_dax_direct_access_fn direct_access;
 
         /* For internal device-mapper use. */
         struct list_head list;