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SubjectRe: Proposal: Eliminate GFP_DMA
> That's a bit broken...  I have an ALS4000 PCI soundcard that is a 24-bit
> soundcard. pci_set_dma_mask should support 24-bits accordingly,
> otherwise it's a bug in your platform implementation... Nobody will be
> able to use certain properly-written drivers on your platform otherwise.

It supports it for pci_alloc_consistent (by mapping it to an GFP_DMA

Just for pci_map_single/pci_map_sg() it is not supported and will
error out when the passed address doesn't fit the mask. That behaviour
is 100% compatible with IA32 which does the same.

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