--- zzzz-none-000/linux-2.6.39.4/arch/x86/include/asm/rwsem.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/arch/x86/include/asm/rwsem.h	2021-11-10 13:38:14.000000000 +0000
@@ -99,7 +99,7 @@
 /*
  * lock for writing
  */
-static inline void __down_write_nested(struct rw_semaphore *sem, int subclass)
+static inline void __down_write_nested(struct rw_semaphore *sem, int subclass __attribute__((unused)))
 {
 	long tmp;
 	asm volatile("# beginning down_write\n\t"