OpenWrt environment, when compiling kernel, turn on Config_input_mouse compile error

When compiling kernel, turn on Config_input_mouse compile error, prompt

Psmouse.ko Error

Undefined reference to ' Lifebook_detect '

Undefined reference to ' Fsp_detect '

The reason is that the GCC version is too high (GCC 5.x) to cause

Modify file drivers/input/mouse/lifebook.h and file drivers/input/mouse/sentelic.h

@@ -16,14 +16,14 @@ -16,14 lifebook_module_init (void); 
int lifebook_detect (struct psmouse *psmouse, bool set_properties);
 int lifebook_init (struct psmouse *psmouse);
 #else
-inline void Lifebook_module_init (void)
+static inline void lifebook_module_init (void)
 {
 }
-inline int lifebook_detect (struct psmouse *psmouse, bool set_properties)
+static inline int lifebook_detect ( struct Psmouse *psmouse, bool set_properties)
 {
 	return-enosys;
 }
-inline int lifebook_init (struct psmouse *psmouse)
+static inline int lifebook_init (struct psmouse *psmouse)
 {
 	return-enosys;
 }

@@ -123,11 +123,11 @@ -123,11 fsp_data {
 extern int fsp_detect (struct psmouse *psmouse, bool set_properties);
 extern int Fsp_init (struct psmouse *psmouse);
 #else
-inline int fsp_detect (struct psmouse *psmouse, bool set_properties)
+static inline int fsp_detect (struct Psmouse *psmouse, bool set_properties)
 {
 	return-enosys;
 }
-inline int fsp_init (struct psmouse *psmouse)
+static inline int fsp_init (struct psmouse *psmouse)
 {
 	Return-enosys;
 }

Reference:

Https://github.com/torvalds/linux/tree/master/drivers/input/mouse