diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 05e2ae2..fe23269 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -456,12 +456,6 @@
 dma_alloc_noncoherent()).
 
 int
-dma_is_consistent(struct device *dev, dma_addr_t dma_handle)
-
-Returns true if the device dev is performing consistent DMA on the memory
-area pointed to by the dma_handle.
-
-int
 dma_get_cache_alignment(void)
 
 Returns the processor cache alignment.  This is the absolute minimum
diff --git a/arch/alpha/include/asm/dma-mapping.h b/arch/alpha/include/asm/dma-mapping.h
index b3423d9..4567aca 100644
--- a/arch/alpha/include/asm/dma-mapping.h
+++ b/arch/alpha/include/asm/dma-mapping.h
@@ -41,7 +41,6 @@
 
 #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)
-#define dma_is_consistent(d, h)			(1)
 
 #define dma_cache_sync(dev, va, size, dir)		  ((void)0)
 
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index f4a996d..c568da7 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -144,11 +144,6 @@
 	return 0;
 }
 
-static inline int dma_is_consistent(struct device *dev, dma_addr_t handle)
-{
-	return !!arch_is_coherent();
-}
-
 /*
  * DMA errors are defined by all-bits-set in the DMA address.
  */
diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h
index af6b816..aaf5199 100644
--- a/arch/avr32/include/asm/dma-mapping.h
+++ b/arch/avr32/include/asm/dma-mapping.h
@@ -336,9 +336,4 @@
 #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_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
-	return 1;
-}
-
 #endif /* __ASM_AVR32_DMA_MAPPING_H */
diff --git a/arch/blackfin/include/asm/dma-mapping.h b/arch/blackfin/include/asm/dma-mapping.h
index 6694a0f..bbf4610 100644
--- a/arch/blackfin/include/asm/dma-mapping.h
+++ b/arch/blackfin/include/asm/dma-mapping.h
@@ -21,7 +21,6 @@
 #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)
 #define dma_supported(d, m)         (1)
-#define dma_is_consistent(d, h)     (1)
 
 static inline int
 dma_set_mask(struct device *dev, u64 dma_mask)
diff --git a/arch/cris/include/asm/dma-mapping.h b/arch/cris/include/asm/dma-mapping.h
index fc30fd0..8588b2c 100644
--- a/arch/cris/include/asm/dma-mapping.h
+++ b/arch/cris/include/asm/dma-mapping.h
@@ -152,8 +152,6 @@
 	return 0;
 }
 
-#define dma_is_consistent(d, h)	(1)
-
 static inline void
 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 	       enum dma_data_direction direction)
diff --git a/arch/frv/include/asm/dma-mapping.h b/arch/frv/include/asm/dma-mapping.h
index 7b05ce1..dfb8110 100644
--- a/arch/frv/include/asm/dma-mapping.h
+++ b/arch/frv/include/asm/dma-mapping.h
@@ -125,8 +125,6 @@
 	return 0;
 }
 
-#define dma_is_consistent(d, h)	(1)
-
 static inline
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		    enum dma_data_direction direction)
diff --git a/arch/ia64/include/asm/dma-mapping.h b/arch/ia64/include/asm/dma-mapping.h
index 8d52dee..a2e7368 100644
--- a/arch/ia64/include/asm/dma-mapping.h
+++ b/arch/ia64/include/asm/dma-mapping.h
@@ -97,6 +97,4 @@
 	mb();
 }
 
-#define dma_is_consistent(d, h)	(1)	/* all we do is coherent memory... */
-
 #endif /* _ASM_IA64_DMA_MAPPING_H */
diff --git a/arch/m68k/include/asm/dma-mapping.h b/arch/m68k/include/asm/dma-mapping.h
index a1ae732..17f7a45 100644
--- a/arch/m68k/include/asm/dma-mapping.h
+++ b/arch/m68k/include/asm/dma-mapping.h
@@ -16,11 +16,6 @@
 	return 0;
 }
 
-static inline int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
-	return 0;
-}
-
 extern void *dma_alloc_coherent(struct device *, size_t,
 				dma_addr_t *, gfp_t);
 extern void dma_free_coherent(struct device *, size_t,
diff --git a/arch/microblaze/include/asm/dma-mapping.h b/arch/microblaze/include/asm/dma-mapping.h
index 21df7cb..8fbb0ec 100644
--- a/arch/microblaze/include/asm/dma-mapping.h
+++ b/arch/microblaze/include/asm/dma-mapping.h
@@ -106,7 +106,6 @@
 
 #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)
-#define dma_is_consistent(d, h)	(1)
 
 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 					dma_addr_t *dma_handle, gfp_t flag)
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index d724a15..18fbf7a 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -62,8 +62,6 @@
 	return 0;
 }
 
-extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
-
 extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 	       enum dma_data_direction direction);
 
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index 9547bc0..7ba8908 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -357,13 +357,6 @@
 
 EXPORT_SYMBOL(dma_supported);
 
-int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
-	return plat_device_is_coherent(dev);
-}
-
-EXPORT_SYMBOL(dma_is_consistent);
-
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 	       enum dma_data_direction direction)
 {
diff --git a/arch/mn10300/include/asm/dma-mapping.h b/arch/mn10300/include/asm/dma-mapping.h
index 8d452a6..c1be439 100644
--- a/arch/mn10300/include/asm/dma-mapping.h
+++ b/arch/mn10300/include/asm/dma-mapping.h
@@ -161,8 +161,6 @@
 	return 0;
 }
 
-#define dma_is_consistent(d)	(1)
-
 static inline
 void dma_cache_sync(void *vaddr, size_t size,
 		    enum dma_data_direction direction)
diff --git a/arch/parisc/include/asm/dma-mapping.h b/arch/parisc/include/asm/dma-mapping.h
index 44d3f62..4ef73b0 100644
--- a/arch/parisc/include/asm/dma-mapping.h
+++ b/arch/parisc/include/asm/dma-mapping.h
@@ -184,12 +184,6 @@
 	return 0;
 }
 
-static inline int
-dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
-{
-	return (hppa_dma_ops->dma_sync_single_for_cpu == NULL);
-}
-
 static inline void
 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 	       enum dma_data_direction direction)
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index a77ba28..8c9c6ad 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -209,11 +209,6 @@
 
 #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)
-#ifdef CONFIG_NOT_COHERENT_CACHE
-#define dma_is_consistent(d, h)	(0)
-#else
-#define dma_is_consistent(d, h)	(1)
-#endif
 
 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		enum dma_data_direction direction)
diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 6bb5cc9..1a73c3e 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -42,12 +42,6 @@
 #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)
 
-#ifdef CONFIG_DMA_COHERENT
-#define dma_is_consistent(d, h) (1)
-#else
-#define dma_is_consistent(d, h) (0)
-#endif
-
 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
 	struct dma_map_ops *ops = get_dma_ops(dev);
diff --git a/arch/sparc/include/asm/dma-mapping.h b/arch/sparc/include/asm/dma-mapping.h
index 74db853..8c0e4f7 100644
--- a/arch/sparc/include/asm/dma-mapping.h
+++ b/arch/sparc/include/asm/dma-mapping.h
@@ -11,7 +11,6 @@
 
 #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)
-#define dma_is_consistent(d, h)	(1)
 
 extern struct dma_map_ops *dma_ops, pci32_dma_ops;
 extern struct bus_type pci_bus_type;
diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h
index 1326b91..15e1dce 100644
--- a/arch/tile/include/asm/dma-mapping.h
+++ b/arch/tile/include/asm/dma-mapping.h
@@ -90,6 +90,4 @@
 	return 0;
 }
 
-#define dma_is_consistent(d, h)	(1)
-
 #endif /* _ASM_TILE_DMA_MAPPING_H */
diff --git a/arch/um/include/asm/dma-mapping.h b/arch/um/include/asm/dma-mapping.h
index b948c14..17a2cb5 100644
--- a/arch/um/include/asm/dma-mapping.h
+++ b/arch/um/include/asm/dma-mapping.h
@@ -94,7 +94,6 @@
 
 #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)
-#define dma_is_consistent(d, h) (1)
 
 static inline int
 dma_get_cache_alignment(void)
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index f9c67e8..d4c419f 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -54,7 +54,6 @@
 
 #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)
-#define dma_is_consistent(d, h)	(1)
 
 extern int dma_supported(struct device *hwdev, u64 mask);
 extern int dma_set_mask(struct device *dev, u64 mask);
diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h
index 7104f2f..492c957 100644
--- a/arch/xtensa/include/asm/dma-mapping.h
+++ b/arch/xtensa/include/asm/dma-mapping.h
@@ -161,8 +161,6 @@
 	return 0;
 }
 
-#define dma_is_consistent(d, h)	(1)
-
 static inline void
 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 	       enum dma_data_direction direction)
diff --git a/include/asm-generic/dma-mapping-broken.h b/include/asm-generic/dma-mapping-broken.h
index 82cd0cb..ccf7b4f 100644
--- a/include/asm-generic/dma-mapping-broken.h
+++ b/include/asm-generic/dma-mapping-broken.h
@@ -72,9 +72,6 @@
 extern int
 dma_get_cache_alignment(void);
 
-extern int
-dma_is_consistent(struct device *dev, dma_addr_t dma_handle);
-
 extern void
 dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 	       enum dma_data_direction direction);