Messages in this thread | | | Date | Fri, 25 Apr 2003 13:40:20 +0200 | From | Christoph Hellwig <> | Subject | [HEADS UP] planned change to <asm-generic/dma-mapping.h> will cause arch breakage |
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To allow including <linux/dma-mapping.h> in generic code the default implemtation of the dma-mapping API in terms of the PCI API will have to go away. What does this mean for your architecture?
- If your architecture doesn't use <asm-generic/dma-mapping.h> (arm, i386, parisc): Nothing. - If your architecture doesn't support PCI (cris, s390. um): Nothing, except that your arch won't break anymore if somsone includes dma-mapping.h in generic code. But it would be cool to move over your dma-capable busses to the dma-mapping API... - Everyone else: Unless you properly implement the dma-mapping in your architecture the dma_* APIs won't work anymore for you. The simplest way to get support for it on pci busses is to change your implementation of the pci_* dma functions to the dma_* prototypes and add the following to their top:
struct pci_dev *pdev = to_pci_dev(dev);
and maybe
BUG_ON(dev->bus != &pci_bus_type);
Of course it would be much nicer if you could add support for the dma-mapping API to your other dma-capable busses.. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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