[POWERPC] Remove the global dma_direct_offset
We no longer need the global dma_direct_offset, update the comment to reflect the new reality. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -112,10 +112,11 @@ EXPORT_SYMBOL(dma_iommu_ops);
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/*
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/*
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* Generic direct DMA implementation
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* Generic direct DMA implementation
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*
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*
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* This implementation supports a global offset that can be applied if
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* This implementation supports a per-device offset that can be applied if
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* the address at which memory is visible to devices is not 0.
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* the address at which memory is visible to devices is not 0. Platform code
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* can set archdata.dma_data to an unsigned long holding the offset. By
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* default the offset is zero.
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*/
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*/
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unsigned long dma_direct_offset;
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static unsigned long get_dma_direct_offset(struct device *dev)
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static unsigned long get_dma_direct_offset(struct device *dev)
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{
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{
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@ -189,8 +189,6 @@ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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extern struct dma_mapping_ops dma_iommu_ops;
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extern struct dma_mapping_ops dma_iommu_ops;
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extern struct dma_mapping_ops dma_direct_ops;
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extern struct dma_mapping_ops dma_direct_ops;
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extern unsigned long dma_direct_offset;
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#else /* CONFIG_PPC64 */
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#else /* CONFIG_PPC64 */
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#define dma_supported(dev, mask) (1)
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#define dma_supported(dev, mask) (1)
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