--- zzzz-none-000/linux-2.6.39.4/tools/perf/util/include/linux/bitops.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/tools/perf/util/include/linux/bitops.h	2021-11-10 13:38:18.000000000 +0000
@@ -27,6 +27,7 @@
 
 static inline unsigned long hweight_long(unsigned long w)
 {
+#error
 	return sizeof(w) == 4 ? hweight32(w) : hweight64(w);
 }