diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 39f21e8..5654357 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -64,20 +64,6 @@ static inline bool is_device_dma_coherent(struct device *dev)
 	return dev->archdata.dma_coherent;
 }
 
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return (dma_addr_t)paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t dev_addr)
-{
-	return (phys_addr_t)dev_addr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
-
 static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 {
 	if (!dev->dma_mask)
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index a8736b9..e6dd1f7 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -33,20 +33,6 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 	return addr + size - 1 <= *dev->dma_mask;
 }
 
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t daddr)
-{
-	return daddr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
-
 static inline void
 dma_cache_sync (struct device *dev, void *vaddr, size_t size,
 	enum dma_data_direction dir)
diff --git a/arch/mips/include/asm/mach-generic/dma-coherence.h b/arch/mips/include/asm/mach-generic/dma-coherence.h
index 54fde22..7bb5de0 100644
--- a/arch/mips/include/asm/mach-generic/dma-coherence.h
+++ b/arch/mips/include/asm/mach-generic/dma-coherence.h
@@ -58,20 +58,4 @@ static inline void plat_post_dma_flush(struct device *dev)
 }
 #endif
 
-#ifdef CONFIG_SWIOTLB
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t daddr)
-{
-	return daddr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
-#endif
-
 #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
index 87c205a..c9cc14e 100644
--- a/arch/tile/include/asm/dma-mapping.h
+++ b/arch/tile/include/asm/dma-mapping.h
@@ -47,20 +47,6 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off)
 	dev->archdata.dma_offset = off;
 }
 
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t daddr)
-{
-	return daddr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
-
 static inline void dma_mark_clean(void *addr, size_t size) {}
 
 static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
diff --git a/arch/unicore32/include/asm/dma-mapping.h b/arch/unicore32/include/asm/dma-mapping.h
index 762cdd8..c629aa5 100644
--- a/arch/unicore32/include/asm/dma-mapping.h
+++ b/arch/unicore32/include/asm/dma-mapping.h
@@ -36,20 +36,6 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 	return 1;
 }
 
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t daddr)
-{
-	return daddr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
-
 static inline void dma_mark_clean(void *addr, size_t size) {}
 
 static inline void dma_cache_sync(struct device *dev, void *vaddr,
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index be8b76e..fd5c7de 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -71,19 +71,6 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 	return addr + size - 1 <= *dev->dma_mask;
 }
 
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t daddr)
-{
-	return daddr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
 #endif /* CONFIG_X86_DMA_REMAP */
 
 static inline void
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
index b0d725d..4e6ff4d 100644
--- a/arch/xtensa/include/asm/dma-mapping.h
+++ b/arch/xtensa/include/asm/dma-mapping.h
@@ -31,18 +31,4 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		    enum dma_data_direction direction);
 
-static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev,
-					     phys_addr_t paddr)
-{
-	return (dma_addr_t)paddr;
-}
-#define swiotlb_phys_to_dma swiotlb_phys_to_dma
-
-static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev,
-					      dma_addr_t daddr)
-{
-	return (phys_addr_t)daddr;
-}
-#define swiotlb_dma_to_phys swiotlb_dma_to_phys
-
 #endif	/* _XTENSA_DMA_MAPPING_H */
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 728ef07..871d620 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -683,4 +683,18 @@ static inline int dma_mmap_writecombine(struct device *dev,
 #define dma_unmap_len_set(PTR, LEN_NAME, VAL)    do { } while (0)
 #endif
 
+#ifndef swiotlb_phys_to_dma
+static inline dma_addr_t swiotlb_phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+         return paddr;
+}
+#endif
+
+#ifndef swiotlb_dma_to_phys
+static inline phys_addr_t swiotlb_dma_to_phys(struct device *dev, dma_addr_t daddr)
+{
+        return daddr;
+}
+#endif
+
 #endif
