1 files changed, 2 insertions, 2 deletions

diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h
index cbae529b7ce0..180d526a55c3 100644
--- a/include/uapi/misc/cxl.h
+++ b/include/uapi/misc/cxl.h
@@ -136,8 +136,8 @@ struct cxl_event_afu_driver_reserved {
          *
          * Of course the contents will be ABI, but that's up the AFU driver.
          */
-        size_t data_size;
-        u8 data[];
+        __u32 data_size;
+        __u8 data[];
 };
 
 struct cxl_event {