> 
> Could this comment instead be maybe:
> 
> Because the kernel-userspace ABI is fixed at a 32-bit offset, while PCI
> resources may live above that, we ignore the map offset for maps of type
> _DRM_FRAMEBUFFER or _DRM_REGISTERS.  It is assumed that each driver will
> have only one resource of each type.
> 
> (I want to remember later what exact ABI problem was in question)

Fair enough. I'll repost.

Cheers,
Ben.

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