/^small_flash$/ and $ret .= "\tselect SMALL_FLASH\n";
/^nand$/ and $ret .= "\tselect NAND_SUPPORT\n";
/^virtio$/ and $ret .= "\tselect VIRTIO_SUPPORT\n";
/^small_flash$/ and $ret .= "\tselect SMALL_FLASH\n";
/^nand$/ and $ret .= "\tselect NAND_SUPPORT\n";
/^virtio$/ and $ret .= "\tselect VIRTIO_SUPPORT\n";