WARNING: Missing or malformed SPDX-License-Identifier tag in line 2
#38: FILE: tools/testing/selftests/net/ip6_tunnel.sh:2:
+# Test that IPv4-over-IPv6 tunneling works.

WARNING: line length of 102 exceeds 80 columns
#51: FILE: tools/testing/selftests/net/ip6_tunnel.sh:15:
+  ip link add link transport1 name tunnel1 type ip6tnl mode ipip6 local 2001:db8::1 remote 2001:db8::2

WARNING: line length of 102 exceeds 80 columns
#62: FILE: tools/testing/selftests/net/ip6_tunnel.sh:26:
+  ip link add link transport2 name tunnel2 type ip6tnl mode ipip6 local 2001:db8::2 remote 2001:db8::1

total: 0 errors, 3 warnings, 0 checks, 48 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 de5e1f031389 ("selftests/net: add test for IPv4-in-IPv6 tunneling") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 3 warnings, 0 checks, 48 lines checked