WARNING: line length of 81 exceeds 80 columns
#74: FILE: net/mptcp/pm_netlink.c:1112:
+		if (mptcp_addresses_equal(&entry->addr, skc, entry->addr.port)) {

WARNING: line length of 81 exceeds 80 columns
#102: FILE: net/mptcp/pm_userspace.c:175:
+	list_for_each_entry(entry, &msk->pm.userspace_pm_local_addr_list, list) {

WARNING: line length of 87 exceeds 80 columns
#126: FILE: net/mptcp/protocol.h:1114:
+bool mptcp_userspace_pm_is_backup(struct mptcp_sock *msk, struct mptcp_addr_info *skc);

WARNING: line length of 87 exceeds 80 columns
#138: FILE: net/mptcp/subflow.c:103:
+	subflow_req->request_bkup = mptcp_pm_is_backup(msk, (struct sock_common *)req);

WARNING: line length of 82 exceeds 80 columns
#146: FILE: net/mptcp/subflow.c:624:
+	subflow->request_bkup = mptcp_pm_is_backup(msk, (struct sock_common *)sk);

total: 0 errors, 5 warnings, 0 checks, 90 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 f3ab16f394e6 ("mptcp: pm: fix backup support in signal endpoints") 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, 0 checks, 90 lines checked