[PATCH 6/7] Remove the global dma_direct_offset

[Michael Ellerman]

We no longer need the global dma_direct_offset, update the comment to
reflect the new reality.

Signed-off-by: Michael Ellerman <michael at ellerman.id.au>
---
 arch/powerpc/kernel/dma_64.c      |    7 ++++---
 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 19d5fb0..26c0d8c 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 point archdata.dma_data at an unsigned long holding the offset. By
+ * default no offset is used.
  */
-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 ff52013..d9b429a 100644
--- a/include/asm-powerpc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -186,8 +186,6 @@ 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)
-- 
1.5.3.7.1.g4e596e