--- zzzz-none-000/linux-4.4.60/include/linux/mtd/physmap.h	2017-04-08 07:53:53.000000000 +0000
+++ maple-7510-730/linux-4.4.60/include/linux/mtd/physmap.h	2021-03-17 14:36:41.000000000 +0000
@@ -25,6 +25,8 @@
 	unsigned int		width;
 	int			(*init)(struct platform_device *);
 	void			(*exit)(struct platform_device *);
+	void			(*lock)(struct platform_device *);
+	void			(*unlock)(struct platform_device *);
 	void			(*set_vpp)(struct platform_device *, int);
 	unsigned int		nr_parts;
 	unsigned int		pfow_base;