[Devel] AcpiOsAllocate with zero argument

[Rudolf Marek <r.marek at assembler.cz>]

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Hi all,

I could not find in the "ACPICA Overview and Programmer Reference" any clues 
what to do if someone calls AcpiOsAllocate() with size of zero. I checked the 
Linux implementation and it just calls kmalloc() which after bit of googling 
seems to return non-NULL for this case. I also tried to walk through the ACPICA 
sources and it seems to me that at least on some places it looks like that it 
could be called with 0 (num_gpe * sizeof(something))
I also tried to look to the "osdeps" of what the UEFI or unix stub do, but they 
simply pass it on. I could not find what UEFI does with zero, I only know
that malloc can either return NULL (and success) or return also non-null pointer.

What is the correct way to handle the zero size allocations? Return non-NULL ?

Thanks
Rudolf