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SubjectRe: DMA API issues
James Bottomley wrote:

> The iseries can't because the PCI bus sits behind the hypervisor and has
> to use accessors to get at the on chip memory, it can't simply be mapped
> into the address space like it can on ARM.

So you're saying that the iSeries can't implement dma_alloc_coherent()
for such hardware, yes? In that case, it should return a polite failure
status. Meanwhile, hardware that _can_ implement it should do so.

- Dave

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