WARNING: line length of 85 exceeds 80 columns
#192: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:542:
+		err = libbpf_ensure_mem((void **) &ids, &cap, sizeof(*ids), cnt + 1);

CHECK: No space is necessary after a cast
#192: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:542:
+		err = libbpf_ensure_mem((void **) &ids, &cap, sizeof(*ids), cnt + 1);

WARNING: line length of 81 exceeds 80 columns
#203: FILE: tools/testing/selftests/bpf/prog_tests/tracing_multi.c:553:
+	link = bpf_program__attach_tracing_multi(skel->progs.bench, NULL, &opts);

total: 0 errors, 2 warnings, 1 checks, 202 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 d4439a02783e ("selftests/bpf: Add tracing multi attach benchmark 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, 2 warnings, 1 checks, 202 lines checked