WARNING: line length of 88 exceeds 80 columns
#50: FILE: tools/testing/selftests/bpf/prog_tests/test_tunnel.c:116:
+	SYS(fail, "ip netns exec at_ns0 sysctl -wq net.ipv6.conf.default.accept_dad=0");

WARNING: line length of 84 exceeds 80 columns
#51: FILE: tools/testing/selftests/bpf/prog_tests/test_tunnel.c:117:
+	SYS(fail, "ip netns exec at_ns0 sysctl -wq net.ipv6.conf.all.accept_dad=0");

WARNING: line length of 82 exceeds 80 columns
#69: FILE: tools/testing/selftests/bpf/prog_tests/test_tunnel.c:418:
+	SYS(fail, "ip -n at_ns0 addr add dev %s %s/24", dev0, IP4_ADDR_TUNL_DEV0);

WARNING: line length of 82 exceeds 80 columns
#70: FILE: tools/testing/selftests/bpf/prog_tests/test_tunnel.c:419:
+	SYS(fail, "ip -n at_ns0 addr add dev %s %s/96", dev0, IP6_ADDR_TUNL_DEV0);

CHECK: Please don't use multiple blank lines
#97: FILE: tools/testing/selftests/bpf/prog_tests/test_tunnel.c:446:
+
+

total: 0 errors, 4 warnings, 1 checks, 276 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 da5284c4b496 ("selftests/bpf: test_tunnel: Move ip6gre tunnel test to test_progs") 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, 1 checks, 276 lines checked