--- zzzz-none-000/linux-4.4.271/include/linux/mtd/physmap.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/linux/mtd/physmap.h	2023-04-19 10:22:30.000000000 +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;