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SubjectRe: [PATCH 2 of 13] ipath - set up 32-bit DMA mask if 64-bit setup fails
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    Segher> PowerPC with U3 or U4 northbridge, i.e. Maple or PowerMac
Segher> G5 systems. If the IOMMU (DART) is disabled, we have a
Segher> 32-bit only DMA mask. The DART will be disabled by
Segher> default if there is 2GB or less of memory (as it isn't
Segher> needed then).

OK, thanks. I was not aware of that situation.

However, I suspect that PathScale has a different situation in mind,
considering that their driver isn't even buildable for that platform ;)

- R.
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