WARNING: Missing a blank line after declarations
#43: FILE: tools/testing/selftests/bpf/prog_tests/attach_probe.c:230:
+	int err, prog_fd;
+	LIBBPF_OPTS(bpf_kprobe_opts, kprobe_opts);

WARNING: line length of 83 exceeds 80 columns
#75: FILE: tools/testing/selftests/bpf/prog_tests/attach_probe.c:262:
+	link_ext = bpf_program__attach_freplace(prog_ext, prog_fd, "kprobe_dummy");

WARNING: line length of 93 exceeds 80 columns
#77: FILE: tools/testing/selftests/bpf/prog_tests/attach_probe.c:264:
+	ASSERT_EQ(libbpf_get_error(link_ext), -EINVAL, "bpf_program__attach_freplace error");

WARNING: line length of 86 exceeds 80 columns
#79: FILE: tools/testing/selftests/bpf/prog_tests/attach_probe.c:266:
+	link_kprobe = bpf_program__attach_kprobe_opts(prog_kprobe, "bpf_fentry_test1",

total: 0 errors, 4 warnings, 0 checks, 104 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 a41fdf9011dc ("selftests/bpf: Add test to verify the fix of kprobe_write_ctx abuse") 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, 4 warnings, 0 checks, 104 lines checked