dma-mapping: move dma_mark_clean to dma-direct.h

And unlike the other helpers we don't require a <asm/dma-direct.h> as
this helper is a special case for ia64 only, and this keeps it as
simple as possible.
Signed-off-by: Christoph Hellwig <hch@lst.de>

arch/arm/include/asm/dma-mapping.h

@@ -109,8 +109,6 @@ static inline bool is_device_dma_coherent(struct device *dev)
 	return dev->archdata.dma_coherent;
 }
 
-static inline void dma_mark_clean(void *addr, size_t size) { }
-
 /**
  * arm_dma_alloc - allocate consistent memory for DMA
  * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices

arch/arm64/include/asm/dma-mapping.h

@@ -50,9 +50,5 @@ static inline bool is_device_dma_coherent(struct device *dev)
 	return dev->archdata.dma_coherent;
 }
 
-static inline void dma_mark_clean(void *addr, size_t size)
-{
-}
-
 #endif	/* __KERNEL__ */
 #endif	/* __ASM_DMA_MAPPING_H */

arch/ia64/Kconfig

@@ -33,6 +33,7 @@ config IA64
 	select HAVE_MEMBLOCK
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_VIRT_CPU_ACCOUNTING
+	select ARCH_HAS_DMA_MARK_CLEAN
 	select ARCH_HAS_SG_CHAIN
 	select VIRT_TO_BUS
 	select ARCH_DISCARD_MEMBLOCK

arch/ia64/include/asm/dma.h

@@ -20,6 +20,4 @@ extern unsigned long MAX_DMA_ADDRESS;
 
 #define free_dma(x)
 
-void dma_mark_clean(void *addr, size_t size);
-
 #endif /* _ASM_IA64_DMA_H */

arch/mips/include/asm/dma-mapping.h

@@ -17,8 +17,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 	return mips_dma_map_ops;
 }
 
-static inline void dma_mark_clean(void *addr, size_t size) {}
-
 #define arch_setup_dma_ops arch_setup_dma_ops
 static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
 				      u64 size, const struct iommu_ops *iommu,

arch/powerpc/include/asm/swiotlb.h

@@ -15,8 +15,6 @@
 
 extern const struct dma_map_ops swiotlb_dma_ops;
 
-static inline void dma_mark_clean(void *addr, size_t size) {}
-
 extern unsigned int ppc_swiotlb_enable;
 int __init swiotlb_setup_bus_notifier(void);
 

arch/tile/include/asm/dma-mapping.h

@@ -44,8 +44,6 @@ static inline void set_dma_offset(struct device *dev, dma_addr_t off)
 	dev->archdata.dma_offset = off;
 }
 
-static inline void dma_mark_clean(void *addr, size_t size) {}
-
 #define HAVE_ARCH_DMA_SET_MASK 1
 int dma_set_mask(struct device *dev, u64 mask);
 

arch/unicore32/include/asm/dma-mapping.h

@@ -25,7 +25,5 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 	return &swiotlb_dma_map_ops;
 }
 
-static inline void dma_mark_clean(void *addr, size_t size) {}
-
 #endif /* __KERNEL__ */
 #endif

arch/x86/include/asm/swiotlb.h

@@ -28,8 +28,6 @@ static inline void pci_swiotlb_late_init(void)
 }
 #endif
 
-static inline void dma_mark_clean(void *addr, size_t size) {}
-
 extern void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
 					dma_addr_t *dma_handle, gfp_t flags,
 					unsigned long attrs);

include/linux/dma-direct.h

@@ -29,4 +29,13 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
 	return addr + size - 1 <= *dev->dma_mask;
 }
 #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
+
+#ifdef CONFIG_ARCH_HAS_DMA_MARK_CLEAN
+void dma_mark_clean(void *addr, size_t size);
+#else
+static inline void dma_mark_clean(void *addr, size_t size)
+{
+}
+#endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */
+
 #endif /* _LINUX_DMA_DIRECT_H */