make -C tools/testing/selftests TARGETS=net/netfilter TEST_PROGS=conntrackk_ipip_mtu.sh TEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-15/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-15/tools/testing/selftests/net/netfilter'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-15/tools/testing/selftests/net/netfilter'
make[1]: Entering directory '/home/virtme/testing-15/tools/testing/selftests/net/netfilter'
TAP version 13
1..1
# timeout set to 1800
# selftests: net/netfilter: conntrack_ipip_mtu.sh
# OK: PMTU without connection tracking
# OK: PMTU with connection tracking
ok 1 selftests: net/netfilter: conntrack_ipip_mtu.sh
make[1]: Leaving directory '/home/virtme/testing-15/tools/testing/selftests/net/netfilter'
make: Leaving directory '/home/virtme/testing-15/tools/testing/selftests'
xx__-> echo $?
0
xx__->