devsw_blk2name
name = devsw_blk2name(B_TYPE(bootdev));
name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK);
name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK);
name = devsw_blk2name(major);
name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK);
name = devsw_blk2name(majdev);
devname = devsw_blk2name(major);
blkname = devsw_blk2name(major(vp->v_rdev));
rootdevname = devsw_blk2name(major(rootdev));
dumpdevname = devsw_blk2name(major(dumpdev));
devsw_blk2name(major(vp->v_specnode->sn_rdev)),
devsw_blk2name(major(dev)), DISKUNIT(dev), (char)DISKPART(dev) +
devsw_blk2name(major(dev)), DISKUNIT(dev));
const char *devsw_blk2name(devmajor_t);