On 13/03/18 18:51, Ard Biesheuvel wrote:
>>>     module_plt_alloc_fixed();
>> Do you consider this a legal C code if without module-plts.o the function 
>> would not exist at all?
>> That's too much relying on optimizer I think...
> Yes, we rely on that in many different places in the kernel.

"However, this approach still allows the C compiler to see the code
inside the block, and check it for correctness (syntax, types, symbol
references, etc).  Thus, you still have to use an #ifdef if the code inside the
block references symbols that will not exist if the condition is not met."
But we can of course ignore it.

Best regards,
Alexander Sverdlin.

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