--- zzzz-none-000/linux-4.4.60/include/linux/of_reserved_mem.h	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/include/linux/of_reserved_mem.h	2018-11-08 13:36:17.000000000 +0000
@@ -34,6 +34,7 @@
 void fdt_init_reserved_mem(void);
 void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
 			       phys_addr_t base, phys_addr_t size);
+struct reserved_mem *fdt_get_reserved_mem_resource(const char* name);
 #else
 static inline int of_reserved_mem_device_init(struct device *dev)
 {
@@ -44,6 +45,7 @@
 static inline void fdt_init_reserved_mem(void) { }
 static inline void fdt_reserved_mem_save_node(unsigned long node,
 		const char *uname, phys_addr_t base, phys_addr_t size) { }
+static inline struct reserved_mem *fdt_get_reserved_mem_resource(const char* name) { return NULL; }
 #endif
 
 #endif /* __OF_RESERVED_MEM_H */