WARNING: line length of 84 exceeds 80 columns
#109: FILE: kernel/bpf/bpf_struct_ops.c:173:
+			    const struct btf_type *func_proto, void *stub_func_addr,

WARNING: line length of 92 exceeds 80 columns
#125: FILE: kernel/bpf/bpf_struct_ops.c:186:
+	stub_fname = kallsyms_lookup((unsigned long)stub_func_addr, NULL, NULL, NULL, ksym);

WARNING: line length of 81 exceeds 80 columns
#134: FILE: kernel/bpf/bpf_struct_ops.c:195:
+		pr_warn("Cannot find the stub function %s in btf\n", stub_fname);

WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#189: FILE: kernel/bpf/bpf_struct_ops.c:313:
+	return func_ptr ? 0 : -ENOTSUPP;

total: 0 errors, 4 warnings, 0 checks, 172 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 79f2045be514 ("bpf: Use kallsyms to find the function name of a struct_ops's stub function") 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, 4 warnings, 0 checks, 172 lines checked