DST_OBSOLETE_DEAD
WRITE_ONCE(dst->obsolete, DST_OBSOLETE_DEAD);
READ_ONCE(dst->obsolete) != DST_OBSOLETE_DEAD) {
rt = dst_alloc(&ipv4_dst_blackhole_ops, NULL, DST_OBSOLETE_DEAD, 0);
DST_OBSOLETE_DEAD, 0);