WARNING: const array should probably be static const
#36: 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
#45: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:527:
+	link = bpf_program__attach_cgroup(misc_skel->progs.misc_hdr_sockopt, cg_fd);

WARNING: line length of 94 exceeds 80 columns
#54: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:536:
+	ret = setsockopt(sk_fds.active_fd, SOL_TCP, TCP_NODELAY, &true_val, sizeof(true_val));

WARNING: line length of 95 exceeds 80 columns
#58: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:540:
+	ret = setsockopt(sk_fds.passive_fd, SOL_TCP, TCP_NODELAY, &true_val, sizeof(true_val));

WARNING: line length of 84 exceeds 80 columns
#72: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:554:
+	ASSERT_NEQ(misc_skel->bss->nr_hdr_sockopt_estab, 0, "nr_hdr_sockopt_estab");

WARNING: line length of 91 exceeds 80 columns
#73: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:555:
+	ASSERT_EQ(misc_skel->bss->nr_hdr_sockopt_estab_err, 0, "nr_hdr_sockopt_estab_err");

WARNING: line length of 87 exceeds 80 columns
#76: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:558:
+	ASSERT_EQ(misc_skel->bss->nr_hdr_sockopt_len_err, 0, "nr_hdr_sockopt_len_err");

WARNING: line length of 84 exceeds 80 columns
#78: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:560:
+	ASSERT_NEQ(misc_skel->bss->nr_hdr_sockopt_write, 0, "nr_hdr_sockopt_write");

WARNING: line length of 91 exceeds 80 columns
#79: FILE: tools/testing/selftests/bpf/prog_tests/tcp_hdr_options.c:561:
+	ASSERT_EQ(misc_skel->bss->nr_hdr_sockopt_write_err, 0, "nr_hdr_sockopt_write_err");

WARNING: line length of 95 exceeds 80 columns
#130: FILE: tools/testing/selftests/bpf/progs/test_misc_tcp_hdr_options.c:346:
+		ret = bpf_setsockopt(skops, SOL_TCP, TCP_NODELAY, &true_val, sizeof(true_val));

WARNING: line length of 95 exceeds 80 columns
#136: FILE: tools/testing/selftests/bpf/progs/test_misc_tcp_hdr_options.c:352:
+		ret = bpf_setsockopt(skops, SOL_TCP, TCP_NODELAY, &true_val, sizeof(true_val));

WARNING: line length of 95 exceeds 80 columns
#144: FILE: tools/testing/selftests/bpf/progs/test_misc_tcp_hdr_options.c:360:
+		ret = bpf_setsockopt(skops, SOL_TCP, TCP_NODELAY, &true_val, sizeof(true_val));

total: 0 errors, 12 warnings, 0 checks, 116 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 bd914a746b54 ("selftests/bpf: Test TCP_NODELAY in TCP hdr opt callbacks") 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, 12 warnings, 0 checks, 116 lines checked