x86: move dma_sync_single_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>

4 files changed, 13 insertions, 17 deletions

diff --git a/arch/x86/kernel/pci-base_32.c b/arch/x86/kernel/pci-base_32.c
index 920530438d8c..dce03c81bb25 100644
--- a/arch/x86/kernel/pci-base_32.c
+++ b/arch/x86/kernel/pci-base_32.c
@@ -35,6 +35,7 @@ static const struct dma_mapping_ops pci32_dma_ops = {
         .unmap_single = NULL,
         .map_sg = pci32_dma_map_sg,
         .unmap_sg = NULL,
+        .sync_single_for_cpu = NULL,
 };
 
 const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;
diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index 6e7747a23e5b..507069d231dd 100644
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -91,4 +91,16 @@ dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
         if (dma_ops->unmap_sg)
                 dma_ops->unmap_sg(hwdev, sg, nents, direction);
 }
+
+static inline void
+dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
+                        size_t size, int direction)
+{
+        BUG_ON(!valid_dma_direction(direction));
+        if (dma_ops->sync_single_for_cpu)
+                dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
+                                             direction);
+        flush_write_buffers();
+}
+
 #endif
diff --git a/include/asm-x86/dma-mapping_32.h b/include/asm-x86/dma-mapping_32.h
index 55445e3e2d66..a05b2fc810bb 100644
--- a/include/asm-x86/dma-mapping_32.h
+++ b/include/asm-x86/dma-mapping_32.h
@@ -33,12 +33,6 @@ dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
 }
 
 static inline void
-dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
-                        enum dma_data_direction direction)
-{
-}
-
-static inline void
 dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
                         enum dma_data_direction direction)
 {
diff --git a/include/asm-x86/dma-mapping_64.h b/include/asm-x86/dma-mapping_64.h
index ce37efb847b3..b055964d1a27 100644
--- a/include/asm-x86/dma-mapping_64.h
+++ b/include/asm-x86/dma-mapping_64.h
@@ -29,17 +29,6 @@ extern void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
 #define dma_unmap_page dma_unmap_single
 
 static inline void
-dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
-                        size_t size, int direction)
-{
-        BUG_ON(!valid_dma_direction(direction));
-        if (dma_ops->sync_single_for_cpu)
-                dma_ops->sync_single_for_cpu(hwdev, dma_handle, size,
-                                             direction);
-        flush_write_buffers();
-}
-
-static inline void
 dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
                            size_t size, int direction)
 {