SI_DEVFS_LINKED
KKASSERT((dev->si_flags & SI_DEVFS_LINKED) == 0);
KKASSERT((dev->si_flags & SI_DEVFS_LINKED) == 0);
dev->si_flags |= SI_DEVFS_LINKED;
if ((dev->si_flags & SI_DEVFS_LINKED)) {
dev->si_flags &= ~SI_DEVFS_LINKED;