--- zzzz-none-000/linux-4.1.52/include/linux/rcupdate.h	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/include/linux/rcupdate.h	2022-03-02 11:37:13.000000000 +0000
@@ -100,7 +100,7 @@
 static inline void rcutorture_record_test_transition(void)
 {
 }
-static inline void rcutorture_record_progress(unsigned long vernum)
+static inline void rcutorture_record_progress(unsigned long vernum __attribute__((unused)))
 {
 }
 #ifdef CONFIG_RCU_TRACE
@@ -317,8 +317,8 @@
 #else
 static inline void rcu_user_enter(void) { }
 static inline void rcu_user_exit(void) { }
-static inline void rcu_user_hooks_switch(struct task_struct *prev,
-					 struct task_struct *next) { }
+static inline void rcu_user_hooks_switch(struct task_struct *prev __maybe_unused,
+					 struct task_struct *next __maybe_unused) { }
 #endif /* CONFIG_RCU_USER_QS */
 
 #ifdef CONFIG_RCU_NOCB_CPU
@@ -418,19 +418,20 @@
 void init_rcu_head_on_stack(struct rcu_head *head);
 void destroy_rcu_head_on_stack(struct rcu_head *head);
 #else /* !CONFIG_DEBUG_OBJECTS_RCU_HEAD */
-static inline void init_rcu_head(struct rcu_head *head)
+static inline void init_rcu_head(struct rcu_head *head __maybe_unused)
 {
 }
 
-static inline void destroy_rcu_head(struct rcu_head *head)
+static inline void destroy_rcu_head(struct rcu_head *head __maybe_unused)
 {
 }
 
-static inline void init_rcu_head_on_stack(struct rcu_head *head)
+static inline void init_rcu_head_on_stack(struct rcu_head *head __maybe_unused)
 {
 }
 
-static inline void destroy_rcu_head_on_stack(struct rcu_head *head)
+static inline void destroy_rcu_head_on_stack(
+					struct rcu_head *head __maybe_unused)
 {
 }
 #endif	/* #else !CONFIG_DEBUG_OBJECTS_RCU_HEAD */
@@ -1166,7 +1167,7 @@
 #elif defined(CONFIG_RCU_NOCB_CPU)
 bool rcu_is_nocb_cpu(int cpu);
 #else
-static inline bool rcu_is_nocb_cpu(int cpu) { return false; }
+static inline bool rcu_is_nocb_cpu(int cpu __maybe_unused) { return false; }
 #endif