CHECK: No space is necessary after a cast
#40: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:39:
+	return strcmp((char *) pa, (char *) pb);

WARNING: line length of 85 exceeds 80 columns
#82: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:81:
+		err = libbpf_ensure_mem((void **) &ids, &cap, sizeof(*ids), cnt + 1);

CHECK: No space is necessary after a cast
#82: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:81:
+		err = libbpf_ensure_mem((void **) &ids, &cap, sizeof(*ids), cnt + 1);

WARNING: Missing a blank line after declarations
#98: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:97:
+	struct tracing_multi_fentry_test *skel = NULL;
+	LIBBPF_OPTS(bpf_tracing_multi_opts, opts);

WARNING: char * array declaration might be better as static const
#100: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:99:
+	const char *funcs_1[] = {

WARNING: char * array declaration might be better as static const
#107: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:106:
+	const char *funcs_2[] = {

WARNING: line length of 84 exceeds 80 columns
#135: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:134:
+	link_1 = bpf_program__attach_tracing_multi(skel->progs.test_1, NULL, &opts);

WARNING: line length of 84 exceeds 80 columns
#142: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:141:
+	link_2 = bpf_program__attach_tracing_multi(skel->progs.test_2, NULL, &opts);

total: 0 errors, 6 warnings, 2 checks, 172 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 23b55e0a589a ("selftests/bpf: Add fentry intersected tracing multi func test") 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, 6 warnings, 2 checks, 172 lines checked