--- zzzz-none-000/linux-4.1.38/include/linux/rcutiny.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/include/linux/rcutiny.h	2020-11-25 10:06:48.000000000 +0000
@@ -87,7 +87,7 @@
  * Take advantage of the fact that there is only one CPU, which
  * allows us to ignore virtualization-based context switches.
  */
-static inline void rcu_virt_note_context_switch(int cpu)
+static inline void rcu_virt_note_context_switch(int cpu __attribute__((unused)))
 {
 }