1 files changed, 5 insertions, 0 deletions

diff --git a/include/uapi/linux/dm-ioctl.h b/include/uapi/linux/dm-ioctl.h
index b8a6bddf0727..7e75b6fd8d45 100644
--- a/include/uapi/linux/dm-ioctl.h
+++ b/include/uapi/linux/dm-ioctl.h
@@ -336,4 +336,9 @@ enum {
  */
 #define DM_SECURE_DATA_FLAG             (1 << 15) /* In */
 
+/*
+ * If set, a message generated output data.
+ */
+#define DM_DATA_OUT_FLAG                (1 << 16) /* Out */
+
 #endif                          /* _LINUX_DM_IOCTL_H */