* fixup routine in the kernel. So we read the old config into cfg,
* then write all 1's to the memory space, read back the result into
* "size", and then write back all the old config.
* fixup routine in the kernel. So we read the old config into cfg,
* then write all 1's to the memory space, read back the result into
* "size", and then write back all the old config.