WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#104: FILE: tools/testing/selftests/bpf/testing_helpers.h:12:
+#ifndef ENOTSUPP

WARNING: ENOTSUPP is not a SUSV4 error code, prefer EOPNOTSUPP
#105: FILE: tools/testing/selftests/bpf/testing_helpers.h:13:
+#define ENOTSUPP 524

total: 0 errors, 2 warnings, 0 checks, 60 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 e643191f8a88 ("selftests/bpf: Define ENOTSUPP in testing_helpers.h") 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, 60 lines checked