MPTCP_RM_ADDR_SIGNAL
rm_addr |= BIT(MPTCP_RM_ADDR_SIGNAL);
rm_addr = msk->pm.addr_signal & ~BIT(MPTCP_RM_ADDR_SIGNAL);
return READ_ONCE(msk->pm.addr_signal) & BIT(MPTCP_RM_ADDR_SIGNAL);