WARNING: line length of 86 exceeds 80 columns
#48: FILE: tools/testing/selftests/bpf/prog_tests/attach_probe.c:193:
+	kretprobe_link = bpf_program__attach_kprobe_opts(skel->progs.handle_kretprobe,

CHECK: No space is necessary after a cast
#102: FILE: tools/testing/selftests/bpf/test_kmods/bpf_testmod_kfunc.h:162:
+void bpf_kfunc_looooooooooooooooooooooooooooooong_name(void) __ksym;

total: 0 errors, 1 warnings, 1 checks, 70 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 3ab0e397b0f6 ("selftests/bpf: Add test for attaching kprobe with long event names") 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, 1 warnings, 1 checks, 70 lines checked