kernel, manager: Track upstream changes (#195)

* These commits are carefully picked from upstream (tiann/KernelSU)

- Picked range:
8c5f485f27..e5f43a3427

Signed-off-by: Faris <rissu.ntk@gmail.com>
Co-authored-by: Wang Han <416810799@qq.com>
Co-authored-by: TwinbornPlate75 <3342733415@qq.com>
Co-authored-by: KOWX712 <leecc0503@gmail.com>
Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: YuKongA <70465933+YuKongA@users.noreply.github.com>
Co-authored-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Co-authored-by: 5ec1cff <56485584+5ec1cff@users.noreply.github.com>
Co-authored-by: weishu <twsxtd@gmail.com>

kernel/ksu.h

@@ -95,8 +95,7 @@ struct app_profile {
 	};
 };
 
-bool ksu_queue_work(struct work_struct *work);
-
+#if 0
 static inline int startswith(char *s, char *prefix)
 {
 	return strncmp(s, prefix, strlen(prefix));
@@ -110,5 +109,6 @@ static inline int endswith(const char *s, const char *t)
 		return 1;
 	return strcmp(s + slen - tlen, t);
 }
+#endif
 
 #endif