WARNING: line length of 85 exceeds 80 columns
#101: FILE: tools/testing/selftests/bpf/test_kmods/bpf_testmod.c:1591:
+		pr_err("multi_st_ops(id:%d) has already been registered\n", map->id);

WARNING: line length of 94 exceeds 80 columns
#159: FILE: tools/testing/selftests/bpf/test_kmods/bpf_testmod.c:1664:
+	ret = ret ?: register_bpf_struct_ops(&testmod_multi_st_ops, bpf_testmod_multi_st_ops);

total: 0 errors, 2 warnings, 0 checks, 154 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 9288815428b2 ("selftests/bpf: Add multi_st_ops that supports multiple instances") 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, 2 warnings, 0 checks, 154 lines checked