--- zzzz-none-000/linux-4.1.38/include/linux/seqlock.h	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/include/linux/seqlock.h	2020-11-25 10:06:48.000000000 +0000
@@ -248,7 +248,7 @@
  * Sequence counter only version assumes that callers are using their
  * own mutexing.
  */
-static inline void write_seqcount_begin_nested(seqcount_t *s, int subclass)
+static inline void write_seqcount_begin_nested(seqcount_t *s, int subclass __maybe_unused)
 {
 	raw_write_seqcount_begin(s);
 	seqcount_acquire(&s->dep_map, subclass, 0, _RET_IP_);