ARM: dma-mapping: provide dma_to_page()

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-By: Jamie Iles <jamie@jamieiles.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/mach-ks8695/include/mach/memory.h b/arch/arm/mach-ks8695/include/mach/memory.h
index 76e5308685a4..ffa19aae6e05 100644
--- a/arch/arm/mach-ks8695/include/mach/memory.h
+++ b/arch/arm/mach-ks8695/include/mach/memory.h
@@ -41,6 +41,13 @@ extern struct bus_type platform_bus_type;
                 __dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
            __dma; })
 
+#define __arch_dma_to_page(dev, x)      \
+        ({ dma_addr_t __dma = x;                                \
+           if (!is_lbus_device(dev))                            \
+                __dma += PHYS_OFFSET - KS8695_PCIMEM_PA;        \
+           phys_to_page(__dma);                                 \
+        })
+
 #endif
 
 #endif