WARNING: externs should be avoided in .c files
#29: FILE: tools/testing/selftests/bpf/bench.c:513:
+extern const struct bench bench_trig_kprobe_multi_all;

WARNING: externs should be avoided in .c files
#30: FILE: tools/testing/selftests/bpf/bench.c:514:
+extern const struct bench bench_trig_kretprobe_multi_all;

CHECK: No space is necessary after a cast
#63: FILE: tools/testing/selftests/bpf/benchs/bench_trigger.c:241:
+	opts.syms = (const char **) syms;

WARNING: line length of 83 exceeds 80 columns
#66: FILE: tools/testing/selftests/bpf/benchs/bench_trigger.c:244:
+	/* attach empty to all the kernel functions except bpf_get_numa_node_id. */

WARNING: line length of 90 exceeds 80 columns
#68: FILE: tools/testing/selftests/bpf/benchs/bench_trigger.c:246:
+		printf("failed to attach bpf_program__attach_kprobe_multi_opts to all\n");

WARNING: From:/Signed-off-by: email address mismatch: 'From: Menglong Dong <menglong8.dong@gmail.com>' != 'Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>'

total: 0 errors, 5 warnings, 1 checks, 125 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 be4b6572568f ("selftests/bpf: add benchmark testing for kprobe-multi-all") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE 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, 5 warnings, 1 checks, 125 lines checked