DEV_OPEN
error = DEV_OPEN(dp)(f, fname);
rc = DEV_OPEN(dp)(f, ctlr, unit, part);
return DEV_OPEN(f->f_dev)(f, basename, file);
error = DEV_OPEN(f->f_dev)(f, &desc);
rc = DEV_OPEN(dp)(f, ctlr, unit, part);
rc = DEV_OPEN(dp)(f, ctlr, unit, part);
error = DEV_OPEN(dp)(f, fname);
return DEV_OPEN()(f);
int (DEV_OPEN(unused))(struct open_file *, ...);
error = DEV_OPEN(f->f_dev)(f, &desc);