--- zzzz-none-000/linux-3.10.107/include/linux/pid_namespace.h	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/include/linux/pid_namespace.h	2021-11-10 11:53:56.000000000 +0000
@@ -71,23 +71,25 @@
 }
 
 static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
-	struct user_namespace *user_ns, struct pid_namespace *ns)
+	struct user_namespace *user_ns __maybe_unused,
+	struct pid_namespace *ns)
 {
 	if (flags & CLONE_NEWPID)
 		ns = ERR_PTR(-EINVAL);
 	return ns;
 }
 
-static inline void put_pid_ns(struct pid_namespace *ns)
+static inline void put_pid_ns(struct pid_namespace *ns __maybe_unused)
 {
 }
 
-static inline void zap_pid_ns_processes(struct pid_namespace *ns)
+static inline void zap_pid_ns_processes(struct pid_namespace *ns __maybe_unused)
 {
 	BUG();
 }
 
-static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
+static inline int reboot_pid_ns(struct pid_namespace *pid_ns __maybe_unused,
+				int cmd __maybe_unused)
 {
 	return 0;
 }