CHECK: Prefer using the BIT macro
#24: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:7:
+#define TEST_BPF_LOG_LEVEL_WARN	(1U << 4)

WARNING: line length of 88 exceeds 80 columns
#30: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:13:
+static int libbpf_print_cb(enum libbpf_print_level level, const char *fmt, va_list args)

WARNING: line length of 86 exceeds 80 columns
#38: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:21:
+	emitted_cnt = vsnprintf(libbpf_log_buf + libbpf_log_pos, left_cnt, fmt, args);

WARNING: line length of 99 exceeds 80 columns
#54: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:37:
+					  prog == skel->progs.test_kfunc_implicit_arg_legacy_impl);

WARNING: line length of 81 exceeds 80 columns
#68: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:51:
+	bpf_program__set_log_buf(skel->progs.test_kfunc_implicit_arg_legacy_impl,

WARNING: line length of 83 exceeds 80 columns
#70: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:53:
+	bpf_program__set_log_level(skel->progs.test_kfunc_implicit_arg_legacy_impl,

WARNING: line length of 100 exceeds 80 columns
#75: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:58:
+	ASSERT_OK_PTR(strstr(log_buf, "uses deprecated kfunc bpf_kfunc_implicit_arg_legacy_impl()"),

WARNING: line length of 95 exceeds 80 columns
#101: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:84:
+	ASSERT_OK_PTR(strstr(libbpf_log_buf, "-- BEGIN PROG LOAD WARNINGS --"), "warn_banner");

WARNING: line length of 91 exceeds 80 columns
#103: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:86:
+			     "uses deprecated kfunc bpf_kfunc_implicit_arg_legacy_impl()"),

WARNING: line length of 91 exceeds 80 columns
#105: FILE: tools/testing/selftests/bpf/prog_tests/kfunc_implicit_args.c:88:
+	ASSERT_NULL(strstr(libbpf_log_buf, "-- BEGIN PROG LOAD LOG --"), "no_verbose_log");

total: 0 errors, 9 warnings, 1 checks, 99 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 470045d89bcc ("selftests/bpf: Test verifier warning logging") 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, 9 warnings, 1 checks, 99 lines checked