Re: Will __pa(vmalloc()) ever work?

[Gerd Knorr]

Timur Tabi <timur.tabi@xxxxxxxxxxx> writes:

> Also, does the pgd/pmd/pte page-table walking work on addresses
> returned by kmalloc(), or do I have to use __pa() to get the physical
> address?

You should use vmalloc_to_page() (this does the page-table walking
with correct locking), then the usual dma mapping interface
(pci_map_page() or pci_map_sg()) to get bus address(es) you can pass
to your device for DMA.

  Gerd

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