--- zzzz-none-000/linux-4.1.38/include/linux/io.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/include/linux/io.h	2020-11-25 10:06:48.000000000 +0000
@@ -100,13 +100,13 @@
  * to have no effect.
  */
 #ifndef arch_phys_wc_add
-static inline int __must_check arch_phys_wc_add(unsigned long base,
-						unsigned long size)
+static inline int __must_check arch_phys_wc_add(unsigned long base __maybe_unused,
+						unsigned long size __maybe_unused)
 {
 	return 0;  /* It worked (i.e. did nothing). */
 }
 
-static inline void arch_phys_wc_del(int handle)
+static inline void arch_phys_wc_del(int handle __maybe_unused)
 {
 }