WARNING: line length of 88 exceeds 80 columns
#138: FILE: tools/testing/selftests/bpf/prog_tests/rhash.c:389:
+	link = bpf_program__attach_iter(skel->progs.dump_bpf_rhash_map_overflow, &opts);

WARNING: line length of 99 exceeds 80 columns
#152: FILE: tools/testing/selftests/bpf/prog_tests/rhash.c:403:
+	while ((len = read(iter_fd, buf + total_read_len, expected_read_len - total_read_len)) > 0)

WARNING: line length of 82 exceeds 80 columns
#160: FILE: tools/testing/selftests/bpf/prog_tests/rhash.c:411:
+	 * Verify overflow actually happened: if total_visits > unique_elem_count,

WARNING: line length of 94 exceeds 80 columns
#163: FILE: tools/testing/selftests/bpf/prog_tests/rhash.c:414:
+	ASSERT_GT(skel->bss->total_visits, skel->bss->unique_elem_count, "overflow_occurred");

total: 0 errors, 4 warnings, 0 checks, 260 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 7021d87a5f94 ("selftests/bpf: Add BPF iterator tests for resizable hash map") 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, 260 lines checked