CHECK: No space is necessary after a cast
#37: FILE: tools/testing/selftests/net/tcp_ao/lib/aolib.h:52:
+	size = (size_t) n + 1;

CHECK: Comparison to NULL could be written "!ret"
#39: FILE: tools/testing/selftests/net/tcp_ao/lib/aolib.h:54:
+	if (ret == NULL)

WARNING: Prefer ____printf__(1, 2) over __attribute__((__format__(__printf__, 1, 2)))
#50: FILE: tools/testing/selftests/net/tcp_ao/lib/aolib.h:65:
+__attribute__((__format__(__printf__, 1, 2)))

total: 0 errors, 1 warnings, 2 checks, 67 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 71bb19b712ed ("selftests/net: Provide test_snprintf() helper") 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, 1 warnings, 2 checks, 67 lines checked