WARNING: line length of 91 exceeds 80 columns
#42: FILE: tools/testing/selftests/net/mptcp/pm_nl_ctl.c:113:
+		error(1, errno, "could not join the " MPTCP_PM_EV_GRP_NAME " mcast group");

WARNING: line length of 94 exceeds 80 columns
#51: FILE: tools/testing/selftests/net/mptcp/pm_nl_ctl.c:285:
+						 !strcmp(RTA_DATA(grp), MPTCP_PM_EV_GRP_NAME))

total: 0 errors, 2 warnings, 0 checks, 28 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 ec49117d0936 ("selftests: mptcp: pm_nl_ctl: remove re-definition") 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, 2 warnings, 0 checks, 28 lines checked