WARNING: line length of 81 exceeds 80 columns
#57: FILE: kernel/bpf/verifier.c:22018:
+	} else if (desc->func_id == special_kfunc_list[KF_bpf_tracing_is_exit]) {

WARNING: line length of 98 exceeds 80 columns
#122: FILE: kernel/trace/bpf_trace.c:3401:
+	err = err ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_KPROBE, &bpf_kprobe_multi_kfunc_set);

WARNING: line length of 94 exceeds 80 columns
#123: FILE: kernel/trace/bpf_trace.c:3402:
+	err = err ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &bpf_tracing_kfunc_set);

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, 4 warnings, 0 checks, 97 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 f14f45f35165 ("bpf: add kfunc bpf_tracing_is_exit for TRACE_SESSION") 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, 4 warnings, 0 checks, 97 lines checked