CHECK: Prefer using the BIT macro
#50: FILE: tools/testing/selftests/bpf/prog_tests/tc_netkit.c:24:
+#define FLAG_ADJUST_ROOM (1 << 0)

CHECK: Prefer using the BIT macro
#51: FILE: tools/testing/selftests/bpf/prog_tests/tc_netkit.c:25:
+#define FLAG_SAME_NETNS  (1 << 1)

WARNING: line length of 86 exceeds 80 columns
#70: FILE: tools/testing/selftests/bpf/prog_tests/tc_netkit.c:73:
+		addattr16(&req.n, sizeof(req), IFLA_NETKIT_HEADROOM, NETKIT_HEADROOM);

WARNING: line length of 86 exceeds 80 columns
#71: FILE: tools/testing/selftests/bpf/prog_tests/tc_netkit.c:74:
+		addattr16(&req.n, sizeof(req), IFLA_NETKIT_TAILROOM, NETKIT_TAILROOM);

total: 0 errors, 2 warnings, 2 checks, 173 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 7d8493f4ce32 ("selftests/bpf: Extend netkit tests to validate set {head,tail}room") 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, 2 checks, 173 lines checked