--- zzzz-none-000/linux-3.10.107/tools/perf/scripts/python/futex-contention.py	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/tools/perf/scripts/python/futex-contention.py	2021-02-04 17:41:59.000000000 +0000
@@ -21,7 +21,7 @@
 lock_waits = {} # long-lived stats on (tid,lock) blockage elapsed time
 process_names = {} # long-lived pid-to-execname mapping
 
-def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm,
+def syscalls__sys_enter_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
 			      nr, uaddr, op, val, utime, uaddr2, val3):
 	cmd = op & FUTEX_CMD_MASK
 	if cmd != FUTEX_WAIT:
@@ -31,7 +31,7 @@
 	thread_thislock[tid] = uaddr
 	thread_blocktime[tid] = nsecs(s, ns)
 
-def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm,
+def syscalls__sys_exit_futex(event, ctxt, cpu, s, ns, tid, comm, callchain,
 			     nr, ret):
 	if thread_blocktime.has_key(tid):
 		elapsed = nsecs(s, ns) - thread_blocktime[tid]