WARNING: line length of 110 exceeds 80 columns
#42: FILE: tools/testing/selftests/net/mptcp/mptcp_connect.c:128:
+	fprintf(stderr, "\t-m [poll|mmap|sendfile|splice] -- use poll(default)/mmap+write/sendfile/splice\n");

WARNING: line length of 125 exceeds 80 columns
#145: FILE: tools/testing/selftests/net/mptcp/mptcp_connect.c:1465:
+	fprintf(stderr, "\t\t\"splice\" - send entire input file (splice), then read response (-l will read input first)\n");

total: 0 errors, 2 warnings, 0 checks, 115 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 7b835fb34499 ("selftests: mptcp: add splice io mode") 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, 2 warnings, 0 checks, 115 lines checked