Manfred Spraul [off-list ref] :
[memcpy_fromio]

Not for a nic without complete documentation: What if an arch uses 
64-bit reads to read two registers at the same time?

So far, no citizen of arch/ does. Afaik it would probably be a bad
idea on pci-x.

that, for example IIRC natsemi explicitely mandates 32-bit reads.
x86-64 doesn't, it uses 32-bit reads, but I don't like the idea of using 
memcpy to read registers.

Ok.

--
Ueimor