CHECK: Macro argument 'member' may be better as '(member)' to avoid precedence issues
#76: FILE: tools/testing/selftests/bpf/progs/mptcp_bpf.h:20:
+#define list_next_entry(pos, member)					\
+	list_entry((pos)->member.next, typeof(*(pos)), member)

CHECK: Macro argument 'pos' may be better as '(pos)' to avoid precedence issues
#79: FILE: tools/testing/selftests/bpf/progs/mptcp_bpf.h:23:
+#define list_entry_is_head(pos, head, member)				\
+	list_is_head(&pos->member, (head))

CHECK: Macro argument 'member' may be better as '(member)' to avoid precedence issues
#79: FILE: tools/testing/selftests/bpf/progs/mptcp_bpf.h:23:
+#define list_entry_is_head(pos, head, member)				\
+	list_is_head(&pos->member, (head))

WARNING: line length of 90 exceeds 80 columns
#121: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:63:
+static int _check_getsockopt_subflow_mark(struct mptcp_sock *msk, struct bpf_sockopt *ctx)

WARNING: line length of 90 exceeds 80 columns
#130: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:72:
+							   struct mptcp_subflow_context));

WARNING: line length of 88 exceeds 80 columns
#141: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:83:
+static int _check_getsockopt_subflow_cc(struct mptcp_sock *msk, struct bpf_sockopt *ctx)

WARNING: line length of 90 exceeds 80 columns
#150: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:92:
+							   struct mptcp_subflow_context));

WARNING: line length of 85 exceeds 80 columns
#154: FILE: tools/testing/selftests/bpf/progs/mptcp_subflow.c:96:
+		    __builtin_memcmp(icsk->icsk_ca_ops->name, cc, TCP_CA_NAME_MAX)) {

total: 0 errors, 5 warnings, 3 checks, 132 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 f2ae6a3475c4 ("selftests/bpf: Add getsockopt to inspect mptcp subflow") 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, 5 warnings, 3 checks, 132 lines checked