It's been forever since I dealt with all the various license types out there, so this may not be completely accurate, but based on what I recall from the matter ages ago ...
If Nintendo made patches to the Linux Kernel to better fit their console system, Nintendo would be required to provide the source code of the changes available should any customer request it. Nintendo would not be required to provide the source code to any unique software they wrote that is not based off existing GPL (v2? v3?) source code.
If Nintendo made patches to the Linux Kernel to better fit their console system, Nintendo would be required to provide the source code of the changes available should any customer request it. Nintendo would not be required to provide the source code to any unique software they wrote that is not based off existing GPL (v2? v3?) source code.