WARNING: line length of 89 exceeds 80 columns
#41: FILE: tools/testing/selftests/net/mptcp/mptcp_sockopt.c:670:
+		xerror("mptcpi_rcv_delta %" PRIu64 ", expect %" PRIu64 ", diff %" PRId64,

WARNING: line length of 84 exceeds 80 columns
#42: FILE: tools/testing/selftests/net/mptcp/mptcp_sockopt.c:671:
+		       s.mptcpi_rcv_delta, ret + 1, s.mptcpi_rcv_delta - (ret + 1));

WARNING: line length of 83 exceeds 80 columns
#54: FILE: tools/testing/selftests/net/mptcp/mptcp_sockopt.c:681:
+			xerror("mptcpi_bytes_received %" PRIu64 ", expect %" PRIu64

total: 0 errors, 3 warnings, 0 checks, 32 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 12de2c16d920 ("selftests: mptcp: sockopt: fix error messages") 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, 3 warnings, 0 checks, 32 lines checked