root_mount_hold
root_mount_token = root_mount_hold("storvsc");
sc->sc_root_token = root_mount_hold(device_get_nameunit(sc->dev));
bus->bus_roothold = root_mount_hold(device_get_nameunit(dev));
sc->sc_rootmount = root_mount_hold("GJOURNAL");
sc->sc_rootmount = root_mount_hold("GMIRROR");
rht = root_mount_hold(mp->name);
vol->v_rootmount = root_mount_hold("GRAID");
mdi->mdio_rootmount = root_mount_hold("GRAID-Intel");
mdi->mdio_rootmount = root_mount_hold("GRAID-JMicron");
mdi->mdio_rootmount = root_mount_hold("GRAID-NVIDIA");
mdi->mdio_rootmount = root_mount_hold("GRAID-SiI");
sc->sc_rootmount = root_mount_hold("GRAID3");
SYSCTL_PROC(_vfs, OID_AUTO, root_mount_hold,
struct root_hold_token *root_mount_hold(const char *identifier);