A subsystem that is statically built into the Linux Kernel is modified
to allow the registration of a structure containing function pointers.
The function pointers corrolate to a set of functions within that subsystem.
If the new structure of pointers has been registered, the original
functions will call the new functions in the structure passing all
arguments and returning the return value of the new function.
With this said, if no structure has been registered, then no
functionality is degraded within the kernel. Only the loss of some cpu
time to check the pointers at the top of the old functions.
Now, if a module is loaded that registers a set of functions that have
increased functionality compared to the original functions, if that
modules is not based off GPL'd code, must the source code of that module
be released under the GPL?
Thanks in advance,
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