WARNING: line length of 97 exceeds 80 columns
#138: FILE: tools/bpf/bpftool/net.c:669:
+static int do_attach_tcx(int progfd, enum net_attach_type attach_type, int ifindex, bool prepend)

CHECK: Alignment should match open parenthesis
#144: FILE: tools/bpf/bpftool/net.c:675:
+		LIBBPF_OPTS(bpf_prog_attach_opts, opts,
+			.flags = BPF_F_BEFORE

WARNING: line length of 86 exceeds 80 columns
#182: FILE: tools/bpf/bpftool/net.c:737:
+			p_err("expected 'overwrite' or 'prepend', got: '%s'?", *argv);

total: 0 errors, 2 warnings, 1 checks, 139 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 6a40f32bdb63 ("bpftool: Add 'prepend' option for tcx attach to insert at chain start") 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, 1 checks, 139 lines checked