WARNING: line length of 85 exceeds 80 columns
#102: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:53:
+	{ "rb-bench-producer", ARG_RB_BENCH_PRODUCER, NULL, 0, "Benchmark producer"},

WARNING: line length of 84 exceeds 80 columns
#126: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:113:
+		fprintf(stderr, "--rb-bench-producer only works with rb-libbpf!\n");

WARNING: line length of 97 exceeds 80 columns
#131: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:118:
+		fprintf(stderr, "overwrite mode only works with --rb-bench-producer for now!\n");

WARNING: line length of 84 exceeds 80 columns
#136: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:123:
+		fprintf(stderr, "no consumer is needed for --rb-bench-producer!\n");

WARNING: line length of 95 exceeds 80 columns
#141: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:128:
+		fprintf(stderr, "back-to-back mode makes no sense for --rb-bench-producer!\n");

WARNING: line length of 91 exceeds 80 columns
#146: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:133:
+		fprintf(stderr, "sampling mode makes no sense for --rb-bench-producer!\n");

WARNING: line length of 106 exceeds 80 columns
#151: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:138:
+		fprintf(stderr, "benchmarks without --rb-bench-producer require exactly one consumer!\n");

CHECK: Alignment should match open parenthesis
#207: FILE: tools/testing/selftests/bpf/benchs/bench_ringbufs.c:231:
+	ctx->ringbuf = ring_buffer__new(map_fd, buf_process_sample,
+			NULL, NULL);

WARNING: line length of 122 exceeds 80 columns
#221: FILE: tools/testing/selftests/bpf/benchs/run_bench_ringbufs.sh:54:
+	summarize "rb-prod nr_prod $b" "$($RUN_BENCH -p$b --rb-batch-cnt 50 --rb-overwrite --rb-bench-producer rb-libbpf)"

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#239: FILE: tools/testing/selftests/bpf/progs/ringbuf_bench.c:18:
+const volatile bool bench_producer = false;

WARNING: Prefer __aligned(128) over __attribute__((aligned(128)))
#243: FILE: tools/testing/selftests/bpf/progs/ringbuf_bench.c:22:
+long hits __attribute__((aligned(128))) = 0;

total: 0 errors, 10 warnings, 1 checks, 183 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 44534d3a3fce ("selftests/bpf/benchs: Add overwrite mode benchmark for BPF ring buffer") 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, 10 warnings, 1 checks, 183 lines checked