MIPS: Synchronize dma_map_page and dma_map_single

Synchronize dma_map_page/dma_unmap_page and dma_map_single/dma_unmap_single.
This will reduce unnecessary writebacks and invalidates.

[Ralf: make dma_unmap_page an inline function.]

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index c64afb40cd06..d16afddb09a9 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -24,8 +24,13 @@ extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
         enum dma_data_direction direction);
 extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
         unsigned long offset, size_t size, enum dma_data_direction direction);
-extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
-        size_t size, enum dma_data_direction direction);
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
+        size_t size, enum dma_data_direction direction)
+{
+        dma_unmap_single(dev, dma_address, size, direction);
+}
+
 extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
         int nhwentries, enum dma_data_direction direction);
 extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,