count_dev
if (count_dev(fdp->cdev) == 1)
if (stp->cap.lock && count_dev(cdev) == 1)
return(count_dev(vp->v_rdev));
int count_dev (cdev_t dev);
opencount = count_dev(dev); /* XXX NOT SMP SAFE */
opencount = count_dev(dev); /* XXX NOT SMP SAFE */