--- zzzz-none-000/linux-3.10.107/tools/perf/scripts/python/net_dropmonitor.py	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/tools/perf/scripts/python/net_dropmonitor.py	2021-02-04 17:41:59.000000000 +0000
@@ -66,7 +66,7 @@
 	print_drop_table()
 
 # called from perf, when it finds a correspoinding event
-def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm,
+def skb__kfree_skb(name, context, cpu, sec, nsec, pid, comm, callchain,
 		   skbaddr, location, protocol):
 	slocation = str(location)
 	try: