CLONE_SHIFT
int unit = minor(kdev) & ((1 << CLONE_SHIFT) - 1);
realminor = dminor & ((1 << CLONE_SHIFT) - 1);
clrbit(pvp->v_specbitmap, minor(dev) >> CLONE_SHIFT);
if (minor(vp->v_rdev) >= (1 << CLONE_SHIFT))
(i << CLONE_SHIFT) | minor(vp->v_rdev)), &cvp);
(minor(vp->v_rdev) >> CLONE_SHIFT == 0)) {
(minor(nvp_rdev) >> CLONE_SHIFT == 0)) {
if (unit & ((1 << CLONE_SHIFT) - 1))
#define pf_unit2idx(_unit_) ((_unit_) >> CLONE_SHIFT)
if (unit & ((1 << CLONE_SHIFT) - 1))