x86: move dma_sync_sg_for_cpu to common header

i386 gets an empty function.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index 260538b6ce2c..1a301d7e4726 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -139,4 +139,13 @@ dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
         flush_write_buffers();
 }
 
+static inline void
+dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
+                    int nelems, int direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+        if (dma_ops->sync_sg_for_cpu)
+                dma_ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
+        flush_write_buffers();
+}
 #endif