di_rdev
spcl.c_rdev = dp->dp1.di_rdev;
spcl.c_rdev = dp->dp2.di_rdev;
(dev_t)DIP(dp, di_rdev) == NODEV) {
printf("block special (%#jx)", (uintmax_t)DIP(dp, di_rdev));
printf("character special (%#jx)", DIP(dp, di_rdev));
sb->st_rdev = VN_ISDEV(vp) ? ip->i_din1->di_rdev : NODEV;
sb->st_rdev = VN_ISDEV(vp) ? ip->i_din2->di_rdev : NODEV;
vap->va_rdev = VN_ISDEV(vp) ? ip->i_din1->di_rdev : NODEV;
vap->va_rdev = VN_ISDEV(vp) ? ip->i_din2->di_rdev : NODEV;
dinp->di_rdev =
dinp->di_rdev =
#define i_ffs1_rdev i_din.dp1.di_rdev
#define i_ffs2_rdev i_din.dp2.di_rdev