--- zzzz-none-000/linux-3.10.107/arch/sh/include/asm/dma-mapping.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/sh/include/asm/dma-mapping.h	2021-02-04 17:41:59.000000000 +0000
@@ -9,86 +9,13 @@
 	return dma_ops;
 }
 
-#include <asm-generic/dma-coherent.h>
-#include <asm-generic/dma-mapping-common.h>
-
-static inline int dma_supported(struct device *dev, u64 mask)
-{
-	struct dma_map_ops *ops = get_dma_ops(dev);
-
-	if (ops->dma_supported)
-		return ops->dma_supported(dev, mask);
-
-	return 1;
-}
-
-static inline int dma_set_mask(struct device *dev, u64 mask)
-{
-	struct dma_map_ops *ops = get_dma_ops(dev);
-
-	if (!dev->dma_mask || !dma_supported(dev, mask))
-		return -EIO;
-	if (ops->set_dma_mask)
-		return ops->set_dma_mask(dev, mask);
+#define DMA_ERROR_CODE 0
 
-	*dev->dma_mask = mask;
-
-	return 0;
-}
+#include <asm-generic/dma-mapping-common.h>
 
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		    enum dma_data_direction dir);
 
-#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
-#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-
-static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-	struct dma_map_ops *ops = get_dma_ops(dev);
-
-	debug_dma_mapping_error(dev, dma_addr);
-	if (ops->mapping_error)
-		return ops->mapping_error(dev, dma_addr);
-
-	return dma_addr == 0;
-}
-
-#define dma_alloc_coherent(d,s,h,f)	dma_alloc_attrs(d,s,h,f,NULL)
-
-static inline void *dma_alloc_attrs(struct device *dev, size_t size,
-				    dma_addr_t *dma_handle, gfp_t gfp,
-				    struct dma_attrs *attrs)
-{
-	struct dma_map_ops *ops = get_dma_ops(dev);
-	void *memory;
-
-	if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
-		return memory;
-	if (!ops->alloc)
-		return NULL;
-
-	memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
-	debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
-
-	return memory;
-}
-
-#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
-
-static inline void dma_free_attrs(struct device *dev, size_t size,
-				  void *vaddr, dma_addr_t dma_handle,
-				  struct dma_attrs *attrs)
-{
-	struct dma_map_ops *ops = get_dma_ops(dev);
-
-	if (dma_release_from_coherent(dev, get_order(size), vaddr))
-		return;
-
-	debug_dma_free_coherent(dev, size, vaddr, dma_handle);
-	if (ops->free)
-		ops->free(dev, size, vaddr, dma_handle, attrs);
-}
-
 /* arch/sh/mm/consistent.c */
 extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
 					dma_addr_t *dma_addr, gfp_t flag,