diff options
Diffstat (limited to 'arch/powerpc/kernel/dma_64.c')
| -rw-r--r-- | arch/powerpc/kernel/dma_64.c | 7 |
1 files changed, 4 insertions, 3 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) { |