CHECK: extern prototypes should be avoided in .h files
#108: FILE: tools/testing/selftests/net/tcp_ao/lib/aolib.h:487:
+extern int test_client_verify(int sk, const size_t msg_len, const size_t nr);

WARNING: Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst
#121: FILE: tools/testing/selftests/net/tcp_ao/lib/sock.c:649:
+				volatile int *err)

total: 0 errors, 1 warnings, 1 checks, 177 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 1b0a64b3dc4c ("selftests/net: Drop timeout argument from test_client_verify()") 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, 1 checks, 177 lines checked