--- zzzz-none-000/linux-4.1.52/include/linux/percpu-defs.h	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/include/linux/percpu-defs.h	2022-03-02 11:37:13.000000000 +0000
@@ -297,7 +297,7 @@
 #ifdef CONFIG_DEBUG_PREEMPT
 extern void __this_cpu_preempt_check(const char *op);
 #else
-static inline void __this_cpu_preempt_check(const char *op) { }
+static inline void __this_cpu_preempt_check(const char *op __maybe_unused) { }
 #endif
 
 #define __pcpu_size_call_return(stem, variable)				\