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[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>
This commit is contained in:
Michael Ellerman 2008-01-21 16:42:48 +11:00 committed by Paul Mackerras
parent 15c60cc472
commit 31d1b49323
2 changed files with 4 additions and 5 deletions
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7
arch/powerpc/kernel/dma_64.c
View File

@ -112,10 +112,11 @@ EXPORT_SYMBOL(dma_iommu_ops);
/*
* Generic direct DMA implementation
*
* This implementation supports a global offset that can be applied if
* the address at which memory is visible to devices is not 0.
* This implementation supports a per-device offset that can be applied if
* the address at which memory is visible to devices is not 0. Platform code
* can set archdata.dma_data to an unsigned long holding the offset. By
* default the offset is zero.
*/
unsigned long dma_direct_offset;
static unsigned long get_dma_direct_offset(struct device *dev)
{

2
include/asm-powerpc/dma-mapping.h
View File

@ -189,8 +189,6 @@ static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
extern struct dma_mapping_ops dma_iommu_ops;
extern struct dma_mapping_ops dma_direct_ops;
extern unsigned long dma_direct_offset;
#else /* CONFIG_PPC64 */
#define dma_supported(dev, mask) (1)