Ar Maw, 2006-06-27 am 10:27 -0500, ysgrifennodd James Bottomley:
> On a PAE platform, dma_addr_t is u64 and unsigned long is u32, so any
> address > 4GB will be truncated by these operations.
>
> I think all this does is cause a slow leak of dma mappings, and on any
> kernel > 2.6.16 the leak should be even smaller, since we've severely
> restricted the use_sg == 0 case. It probably is only significant on
> x86_64 with the gart iommu enabled.
On x86_64 the dma_addr_t and the ulong are both 64bit so the problem
doesn't arise.
Alan
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