WARNING: line length of 82 exceeds 80 columns
#739: FILE: tools/testing/selftests/net/tun.c:232:
+		/* Reopen via pidfd_getfd() so we duplicate packetdrill's attached

WARNING: line length of 82 exceeds 80 columns
#787: FILE: tools/testing/selftests/net/tun.c:280:
+		fprintf(stderr, "invalid PACKETDRILL_PID: %s\n", packetdrill_pid);

total: 0 errors, 2 warnings, 0 checks, 742 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 fa04ee53c483 ("tun/selftests: add RX truesize injection for TCP window tests") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE FILE_PATH_CHANGES 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, 742 lines checked