I'm afraid I don't understand the 'unreasonable' argument here. Linux is
eating your lunch today. Do you want it to eat your dessert as well?
-matt
bus_size_t is used for things like measuring transfer segment size. There is
little chance that Linux, Windows, FreeBSD, or any other OS
is ever going to try to DMA more than 2^32 bytes of data in a single
bus transaction. Maybe you could contrive a silly infiniband device
to do it. Anyways, it has no bearing on whether the CPU, memory
controller, or PCI buses can do 64 bit addressing.
Oh, sorry, yes, I agree it's *unlikely* that anything will DMA more than
2^32 bytes at a time right now. I'm really really tired and lost lock.
Sorry.
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