--- zzzz-none-000/linux-4.1.38/include/linux/rcutree.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/include/linux/rcutree.h	2020-11-25 10:06:48.000000000 +0000
@@ -41,7 +41,7 @@
  * wrapper around rcu_note_context_switch(), which allows TINY_RCU
  * to save a few bytes.
  */
-static inline void rcu_virt_note_context_switch(int cpu)
+static inline void rcu_virt_note_context_switch(int cpu __maybe_unused)
 {
 	rcu_note_context_switch();
 }