WARNING: Unknown commit id '4d120186e4d6', maybe rebased or not pulled?
#36: 
    commit 4d120186e4d6 ("bpf:examples: update mptcp_set_mark_kern.c")

WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
#54: 
new file mode 100644

WARNING: line length of 94 exceeds 80 columns
#104: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:46:
+		/* A new MPTCP connection is just initiated and this is its primary subflow */

WARNING: line length of 90 exceeds 80 columns
#114: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:56:
+		err = bpf_setsockopt(skops, SOL_TCP, TCP_CONGESTION, cc, TCP_CA_NAME_MAX);

total: 0 errors, 4 warnings, 0 checks, 59 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 6d5b6cfab001 ("selftests/bpf: Add mptcp subflow example") 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, 4 warnings, 0 checks, 59 lines checked