WARNING: line length of 87 exceeds 80 columns
#80: FILE: tools/testing/selftests/net/act_nat_icmp_csum.sh:40:
+	modinfo $mod &>/dev/null || { echo "SKIP: Need $mod module"; exit $ksft_skip; }

total: 0 errors, 1 warnings, 0 checks, 223 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 26229558ee82 ("selftests: net: add act_nat ICMP inner checksum test") 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, 1 warnings, 0 checks, 223 lines checked