WARNING: const array should probably be static const
#33: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:518:
+	const char send_msg[] = "MISC!!!";

WARNING: line length of 84 exceeds 80 columns
#40: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:525:
+	link = bpf_program__attach_cgroup(misc_skel->progs.misc_hdr_sockopt, cg_fd);

WARNING: line length of 89 exceeds 80 columns
#94: FILE: tools/testing/selftests/bpf/progs/test_misc_tcp_hdr_options.c:340:
+		bpf_setsockopt(skops, SOL_TCP, TCP_NODELAY, &true_val, sizeof(true_val));

total: 0 errors, 3 warnings, 0 checks, 68 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 8950c46402ad ("selftests/bpf: Cover TCP_NODELAY in hdr opt callback") 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, 3 warnings, 0 checks, 68 lines checked