make -C tools/testing/selftests TARGETS=net/forwarding TEST_PROGS=ip6gre_fflat.sh TEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-4/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
make[1]: Entering directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
TAP version 13
1..1
# overriding timeout to 21600
# selftests: net/forwarding: ip6gre_flat.sh
[   31.697725][  T316] 8021q: 802.1Q VLAN Support v1.8
[   32.320155][  T321] gre: GRE over IPv4 demultiplexor driver
[   32.401594][  T321] ip6_gre: GRE over IPv6 tunneling driver
[   45.715998][  T396] GACT probability NOT on
# TEST: GRE flat IPv4-in-IPv6                                         [ OK ]
# TEST: GRE flat IPv6-in-IPv6                                         [ OK ]
# TEST: ping GRE IPv6, packet size 1800 after MTU change              [ OK ]
ok 1 selftests: net/forwarding: ip6gre_flat.sh
make[1]: Leaving directory '/home/virtme/testing-4/tools/testing/selftests/net/forwarding'
make: Leaving directory '/home/virtme/testing-4/tools/testing/selftests'
xx__-> echo $?
0
xx__->