WARNING: line length of 83 exceeds 80 columns
#34: FILE: tools/testing/selftests/net/big_tcp.sh:41:
+	$ipv6 && ip -net $CLIENT_NS route add $SERVER_IP6 dev link0 via $CLIENT_GW6

WARNING: line length of 81 exceeds 80 columns
#60: FILE: tools/testing/selftests/net/big_tcp.sh:69:
+	$ipv6 && ip net exec $ROUTER_NS sysctl -wq net.ipv6.conf.all.forwarding=1

WARNING: line length of 83 exceeds 80 columns
#68: FILE: tools/testing/selftests/net/big_tcp.sh:75:
+	$ipv6 && ip -net $SERVER_NS route add $CLIENT_IP6 dev link3 via $SERVER_GW6

WARNING: line length of 88 exceeds 80 columns
#78: FILE: tools/testing/selftests/net/big_tcp.sh:172:
+	echo -e "\t-4: IPv4 only: disable IPv6 tests (default: test both IPv4 and IPv6)"

total: 0 errors, 4 warnings, 0 checks, 83 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit c6c45a9f0269 ("selftests/net: big_tcp: make ipv6 testing optional") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 4 warnings, 0 checks, 83 lines checked