WARNING: line length of 84 exceeds 80 columns
#70: FILE: kernel/bpf/verifier.c:22557:
+	} else if (desc->func_id == special_kfunc_list[KF_bpf_fsession_is_return]) {

WARNING: line length of 87 exceeds 80 columns
#73: FILE: kernel/bpf/verifier.c:22560:
+		insn_buf[1] = BPF_ALU64_IMM(BPF_RSH, BPF_REG_0, BPF_TRAMP_M_IS_RETURN);

WARNING: line length of 98 exceeds 80 columns
#125: FILE: kernel/trace/bpf_trace.c:3395:
+	err = err ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_KPROBE, &bpf_kprobe_multi_kfunc_set);

WARNING: line length of 94 exceeds 80 columns
#126: FILE: kernel/trace/bpf_trace.c:3396:
+	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, 5 warnings, 0 checks, 96 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 fffb0bf8f0d4 ("bpf: add the kfunc bpf_fsession_is_return") 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, 5 warnings, 0 checks, 96 lines checked