diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h
index aefc378f8dc98e784237e636c30ad498bdc5b205..923ec2591eb7ca80def76f50588bb54644459672 100644
--- a/include/linux/mfd/core.h
+++ b/include/linux/mfd/core.h
@@ -36,9 +36,6 @@ struct mfd_cell {
 	/* platform_data can be used to pass data to "generic" drivers */
 	void			*platform_data;
 
-	/* unused */
-	size_t			data_size;
-
 	/*
 	 * These resources can be specified relative to the parent device.
 	 * For accessing hardware you should use resources from the platform dev