struct dhcpv4_assignment *a = list_first_entry(&iface->dhcpv4_assignments,
struct dhcpv4_assignment, head);
list_del(&a->head);
struct dhcpv4_assignment *a = list_first_entry(&iface->dhcpv4_assignments,
struct dhcpv4_assignment, head);
list_del(&a->head);