diff options
| -rw-r--r-- | arch/powerpc/kernel/dma_64.c | 7 | ||||
| -rw-r--r-- | include/asm-powerpc/dma-mapping.h | 2 |
2 files changed, 4 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/dma_64.c b/arch/powerpc/kernel/dma_64.c index a2d076d005c0..72fdc06df51e 100644 --- a/arch/powerpc/kernel/dma_64.c +++ b/arch/powerpc/kernel/dma_64.c @@ -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) { diff --git a/include/asm-powerpc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h index e974876e18d2..5eea6dbc0aa2 100644 --- a/include/asm-powerpc/dma-mapping.h +++ b/include/asm-powerpc/dma-mapping.h @@ -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) |