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[Xen-devel] [RFC v3 05/45] ARM: dma-mapping: Use unsigned long for dma_attrs



Split out subsystem specific changes for easier reviews. This will be
squashed with main commit.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
 arch/arm/common/dmabounce.c              |  4 +-
 arch/arm/include/asm/dma-mapping.h       | 13 +++--
 arch/arm/include/asm/xen/page-coherent.h | 16 +++----
 arch/arm/mm/dma-mapping.c                | 81 ++++++++++++++++----------------
 arch/arm/xen/mm.c                        |  4 +-
 5 files changed, 56 insertions(+), 62 deletions(-)

diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index 1143c4d5c567..301281645d08 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -310,7 +310,7 @@ static inline void unmap_single(struct device *dev, struct 
safe_buffer *buf,
  */
 static dma_addr_t dmabounce_map_page(struct device *dev, struct page *page,
                unsigned long offset, size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs)
+               unsigned long attrs)
 {
        dma_addr_t dma_addr;
        int ret;
@@ -344,7 +344,7 @@ static dma_addr_t dmabounce_map_page(struct device *dev, 
struct page *page,
  * should be)
  */
 static void dmabounce_unmap_page(struct device *dev, dma_addr_t dma_addr, 
size_t size,
-               enum dma_data_direction dir, struct dma_attrs *attrs)
+               enum dma_data_direction dir, unsigned long attrs)
 {
        struct safe_buffer *buf;
 
diff --git a/arch/arm/include/asm/dma-mapping.h 
b/arch/arm/include/asm/dma-mapping.h
index a83570f10124..d009f7911ffc 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -5,7 +5,6 @@
 
 #include <linux/mm_types.h>
 #include <linux/scatterlist.h>
-#include <linux/dma-attrs.h>
 #include <linux/dma-debug.h>
 
 #include <asm/memory.h>
@@ -174,7 +173,7 @@ static inline void dma_mark_clean(void *addr, size_t size) 
{ }
  * to be the device-viewed address.
  */
 extern void *arm_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
-                          gfp_t gfp, struct dma_attrs *attrs);
+                          gfp_t gfp, unsigned long attrs);
 
 /**
  * arm_dma_free - free memory allocated by arm_dma_alloc
@@ -191,7 +190,7 @@ extern void *arm_dma_alloc(struct device *dev, size_t size, 
dma_addr_t *handle,
  * during and after this call executing are illegal.
  */
 extern void arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
-                        dma_addr_t handle, struct dma_attrs *attrs);
+                        dma_addr_t handle, unsigned long attrs);
 
 /**
  * arm_dma_mmap - map a coherent DMA allocation into user space
@@ -208,7 +207,7 @@ extern void arm_dma_free(struct device *dev, size_t size, 
void *cpu_addr,
  */
 extern int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
                        void *cpu_addr, dma_addr_t dma_addr, size_t size,
-                       struct dma_attrs *attrs);
+                       unsigned long attrs);
 
 /*
  * This can be called during early boot to increase the size of the atomic
@@ -262,16 +261,16 @@ extern void dmabounce_unregister_dev(struct device *);
  * The scatter list versions of the above methods.
  */
 extern int arm_dma_map_sg(struct device *, struct scatterlist *, int,
-               enum dma_data_direction, struct dma_attrs *attrs);
+               enum dma_data_direction, unsigned long attrs);
 extern void arm_dma_unmap_sg(struct device *, struct scatterlist *, int,
-               enum dma_data_direction, struct dma_attrs *attrs);
+               enum dma_data_direction, unsigned long attrs);
 extern void arm_dma_sync_sg_for_cpu(struct device *, struct scatterlist *, int,
                enum dma_data_direction);
 extern void arm_dma_sync_sg_for_device(struct device *, struct scatterlist *, 
int,
                enum dma_data_direction);
 extern int arm_dma_get_sgtable(struct device *dev, struct sg_table *sgt,
                void *cpu_addr, dma_addr_t dma_addr, size_t size,
-               struct dma_attrs *attrs);
+               unsigned long attrs);
 
 #endif /* __KERNEL__ */
 #endif
diff --git a/arch/arm/include/asm/xen/page-coherent.h 
b/arch/arm/include/asm/xen/page-coherent.h
index 9408a994cc91..95ce6ac3a971 100644
--- a/arch/arm/include/asm/xen/page-coherent.h
+++ b/arch/arm/include/asm/xen/page-coherent.h
@@ -2,15 +2,14 @@
 #define _ASM_ARM_XEN_PAGE_COHERENT_H
 
 #include <asm/page.h>
-#include <linux/dma-attrs.h>
 #include <linux/dma-mapping.h>
 
 void __xen_dma_map_page(struct device *hwdev, struct page *page,
             dma_addr_t dev_addr, unsigned long offset, size_t size,
-            enum dma_data_direction dir, struct dma_attrs *attrs);
+            enum dma_data_direction dir, unsigned long attrs);
 void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
                size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs);
+               unsigned long attrs);
 void __xen_dma_sync_single_for_cpu(struct device *hwdev,
                dma_addr_t handle, size_t size, enum dma_data_direction dir);
 
@@ -18,22 +17,20 @@ void __xen_dma_sync_single_for_device(struct device *hwdev,
                dma_addr_t handle, size_t size, enum dma_data_direction dir);
 
 static inline void *xen_alloc_coherent_pages(struct device *hwdev, size_t size,
-               dma_addr_t *dma_handle, gfp_t flags,
-               struct dma_attrs *attrs)
+               dma_addr_t *dma_handle, gfp_t flags, unsigned long attrs)
 {
        return __generic_dma_ops(hwdev)->alloc(hwdev, size, dma_handle, flags, 
attrs);
 }
 
 static inline void xen_free_coherent_pages(struct device *hwdev, size_t size,
-               void *cpu_addr, dma_addr_t dma_handle,
-               struct dma_attrs *attrs)
+               void *cpu_addr, dma_addr_t dma_handle, unsigned long attrs)
 {
        __generic_dma_ops(hwdev)->free(hwdev, size, cpu_addr, dma_handle, 
attrs);
 }
 
 static inline void xen_dma_map_page(struct device *hwdev, struct page *page,
             dma_addr_t dev_addr, unsigned long offset, size_t size,
-            enum dma_data_direction dir, struct dma_attrs *attrs)
+            enum dma_data_direction dir, unsigned long attrs)
 {
        unsigned long page_pfn = page_to_xen_pfn(page);
        unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr);
@@ -58,8 +55,7 @@ static inline void xen_dma_map_page(struct device *hwdev, 
struct page *page,
 }
 
 static inline void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
-               size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs)
+               size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
        unsigned long pfn = PFN_DOWN(handle);
        /*
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index ff7ed5697d3e..ebb3fde99043 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -124,7 +124,7 @@ static void __dma_page_dev_to_cpu(struct page *, unsigned 
long,
  */
 static dma_addr_t arm_dma_map_page(struct device *dev, struct page *page,
             unsigned long offset, size_t size, enum dma_data_direction dir,
-            struct dma_attrs *attrs)
+            unsigned long attrs)
 {
        if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
                __dma_page_cpu_to_dev(page, offset, size, dir);
@@ -133,7 +133,7 @@ static dma_addr_t arm_dma_map_page(struct device *dev, 
struct page *page,
 
 static dma_addr_t arm_coherent_dma_map_page(struct device *dev, struct page 
*page,
             unsigned long offset, size_t size, enum dma_data_direction dir,
-            struct dma_attrs *attrs)
+            unsigned long attrs)
 {
        return pfn_to_dma(dev, page_to_pfn(page)) + offset;
 }
@@ -153,8 +153,7 @@ static dma_addr_t arm_coherent_dma_map_page(struct device 
*dev, struct page *pag
  * whatever the device wrote there.
  */
 static void arm_dma_unmap_page(struct device *dev, dma_addr_t handle,
-               size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs)
+               size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
        if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
                __dma_page_dev_to_cpu(pfn_to_page(dma_to_pfn(dev, handle)),
@@ -194,12 +193,12 @@ struct dma_map_ops arm_dma_ops = {
 EXPORT_SYMBOL(arm_dma_ops);
 
 static void *arm_coherent_dma_alloc(struct device *dev, size_t size,
-       dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs);
+       dma_addr_t *handle, gfp_t gfp, unsigned long attrs);
 static void arm_coherent_dma_free(struct device *dev, size_t size, void 
*cpu_addr,
-                                 dma_addr_t handle, struct dma_attrs *attrs);
+                                 dma_addr_t handle, unsigned long attrs);
 static int arm_coherent_dma_mmap(struct device *dev, struct vm_area_struct 
*vma,
                 void *cpu_addr, dma_addr_t dma_addr, size_t size,
-                struct dma_attrs *attrs);
+                unsigned long attrs);
 
 struct dma_map_ops arm_coherent_dma_ops = {
        .alloc                  = arm_coherent_dma_alloc,
@@ -621,7 +620,7 @@ static void __free_from_contiguous(struct device *dev, 
struct page *page,
        dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT);
 }
 
-static inline pgprot_t __get_dma_pgprot(struct dma_attrs *attrs, pgprot_t prot)
+static inline pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot)
 {
        prot = dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs) ?
                            pgprot_writecombine(prot) :
@@ -732,7 +731,7 @@ static struct arm_dma_allocator remap_allocator = {
 
 static void *__dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
                         gfp_t gfp, pgprot_t prot, bool is_coherent,
-                        struct dma_attrs *attrs, const void *caller)
+                        unsigned long attrs, const void *caller)
 {
        u64 mask = get_coherent_dma_mask(dev);
        struct page *page = NULL;
@@ -814,7 +813,7 @@ static void *__dma_alloc(struct device *dev, size_t size, 
dma_addr_t *handle,
  * virtual and bus address for that space.
  */
 void *arm_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
-                   gfp_t gfp, struct dma_attrs *attrs)
+                   gfp_t gfp, unsigned long attrs)
 {
        pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL);
 
@@ -823,7 +822,7 @@ void *arm_dma_alloc(struct device *dev, size_t size, 
dma_addr_t *handle,
 }
 
 static void *arm_coherent_dma_alloc(struct device *dev, size_t size,
-       dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs)
+       dma_addr_t *handle, gfp_t gfp, unsigned long attrs)
 {
        return __dma_alloc(dev, size, handle, gfp, PAGE_KERNEL, true,
                           attrs, __builtin_return_address(0));
@@ -831,7 +830,7 @@ static void *arm_coherent_dma_alloc(struct device *dev, 
size_t size,
 
 static int __arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
                 void *cpu_addr, dma_addr_t dma_addr, size_t size,
-                struct dma_attrs *attrs)
+                unsigned long attrs)
 {
        int ret = -ENXIO;
 #ifdef CONFIG_MMU
@@ -859,14 +858,14 @@ static int __arm_dma_mmap(struct device *dev, struct 
vm_area_struct *vma,
  */
 static int arm_coherent_dma_mmap(struct device *dev, struct vm_area_struct 
*vma,
                 void *cpu_addr, dma_addr_t dma_addr, size_t size,
-                struct dma_attrs *attrs)
+                unsigned long attrs)
 {
        return __arm_dma_mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
 }
 
 int arm_dma_mmap(struct device *dev, struct vm_area_struct *vma,
                 void *cpu_addr, dma_addr_t dma_addr, size_t size,
-                struct dma_attrs *attrs)
+                unsigned long attrs)
 {
 #ifdef CONFIG_MMU
        vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot);
@@ -878,7 +877,7 @@ int arm_dma_mmap(struct device *dev, struct vm_area_struct 
*vma,
  * Free a buffer as defined by the above mapping.
  */
 static void __arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
-                          dma_addr_t handle, struct dma_attrs *attrs,
+                          dma_addr_t handle, unsigned long attrs,
                           bool is_coherent)
 {
        struct page *page = pfn_to_page(dma_to_pfn(dev, handle));
@@ -900,20 +899,20 @@ static void __arm_dma_free(struct device *dev, size_t 
size, void *cpu_addr,
 }
 
 void arm_dma_free(struct device *dev, size_t size, void *cpu_addr,
-                 dma_addr_t handle, struct dma_attrs *attrs)
+                 dma_addr_t handle, unsigned long attrs)
 {
        __arm_dma_free(dev, size, cpu_addr, handle, attrs, false);
 }
 
 static void arm_coherent_dma_free(struct device *dev, size_t size, void 
*cpu_addr,
-                                 dma_addr_t handle, struct dma_attrs *attrs)
+                                 dma_addr_t handle, unsigned long attrs)
 {
        __arm_dma_free(dev, size, cpu_addr, handle, attrs, true);
 }
 
 int arm_dma_get_sgtable(struct device *dev, struct sg_table *sgt,
                 void *cpu_addr, dma_addr_t handle, size_t size,
-                struct dma_attrs *attrs)
+                unsigned long attrs)
 {
        struct page *page = pfn_to_page(dma_to_pfn(dev, handle));
        int ret;
@@ -1046,7 +1045,7 @@ static void __dma_page_dev_to_cpu(struct page *page, 
unsigned long off,
  * here.
  */
 int arm_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-               enum dma_data_direction dir, struct dma_attrs *attrs)
+               enum dma_data_direction dir, unsigned long attrs)
 {
        struct dma_map_ops *ops = get_dma_ops(dev);
        struct scatterlist *s;
@@ -1080,7 +1079,7 @@ int arm_dma_map_sg(struct device *dev, struct scatterlist 
*sg, int nents,
  * rules concerning calls here are the same as for dma_unmap_single().
  */
 void arm_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
-               enum dma_data_direction dir, struct dma_attrs *attrs)
+               enum dma_data_direction dir, unsigned long attrs)
 {
        struct dma_map_ops *ops = get_dma_ops(dev);
        struct scatterlist *s;
@@ -1253,7 +1252,7 @@ static inline void __free_iova(struct dma_iommu_mapping 
*mapping,
 static const int iommu_order_array[] = { 9, 8, 4, 0 };
 
 static struct page **__iommu_alloc_buffer(struct device *dev, size_t size,
-                                         gfp_t gfp, struct dma_attrs *attrs)
+                                         gfp_t gfp, unsigned long attrs)
 {
        struct page **pages;
        int count = size >> PAGE_SHIFT;
@@ -1342,7 +1341,7 @@ error:
 }
 
 static int __iommu_free_buffer(struct device *dev, struct page **pages,
-                              size_t size, struct dma_attrs *attrs)
+                              size_t size, unsigned long attrs)
 {
        int count = size >> PAGE_SHIFT;
        int i;
@@ -1439,7 +1438,7 @@ static struct page **__atomic_get_pages(void *addr)
        return (struct page **)page;
 }
 
-static struct page **__iommu_get_pages(void *cpu_addr, struct dma_attrs *attrs)
+static struct page **__iommu_get_pages(void *cpu_addr, unsigned long attrs)
 {
        struct vm_struct *area;
 
@@ -1484,7 +1483,7 @@ static void __iommu_free_atomic(struct device *dev, void 
*cpu_addr,
 }
 
 static void *arm_iommu_alloc_attrs(struct device *dev, size_t size,
-           dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs)
+           dma_addr_t *handle, gfp_t gfp, unsigned long attrs)
 {
        pgprot_t prot = __get_dma_pgprot(attrs, PAGE_KERNEL);
        struct page **pages;
@@ -1532,7 +1531,7 @@ err_buffer:
 
 static int arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
                    void *cpu_addr, dma_addr_t dma_addr, size_t size,
-                   struct dma_attrs *attrs)
+                   unsigned long attrs)
 {
        unsigned long uaddr = vma->vm_start;
        unsigned long usize = vma->vm_end - vma->vm_start;
@@ -1568,7 +1567,7 @@ static int arm_iommu_mmap_attrs(struct device *dev, 
struct vm_area_struct *vma,
  * Must not be called with IRQs disabled.
  */
 void arm_iommu_free_attrs(struct device *dev, size_t size, void *cpu_addr,
-                         dma_addr_t handle, struct dma_attrs *attrs)
+                         dma_addr_t handle, unsigned long attrs)
 {
        struct page **pages;
        size = PAGE_ALIGN(size);
@@ -1595,7 +1594,7 @@ void arm_iommu_free_attrs(struct device *dev, size_t 
size, void *cpu_addr,
 
 static int arm_iommu_get_sgtable(struct device *dev, struct sg_table *sgt,
                                 void *cpu_addr, dma_addr_t dma_addr,
-                                size_t size, struct dma_attrs *attrs)
+                                size_t size, unsigned long attrs)
 {
        unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
        struct page **pages = __iommu_get_pages(cpu_addr, attrs);
@@ -1633,7 +1632,7 @@ static int __dma_direction_to_prot(enum 
dma_data_direction dir)
  */
 static int __map_sg_chunk(struct device *dev, struct scatterlist *sg,
                          size_t size, dma_addr_t *handle,
-                         enum dma_data_direction dir, struct dma_attrs *attrs,
+                         enum dma_data_direction dir, unsigned long attrs,
                          bool is_coherent)
 {
        struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
@@ -1676,7 +1675,7 @@ fail:
 }
 
 static int __iommu_map_sg(struct device *dev, struct scatterlist *sg, int 
nents,
-                    enum dma_data_direction dir, struct dma_attrs *attrs,
+                    enum dma_data_direction dir, unsigned long attrs,
                     bool is_coherent)
 {
        struct scatterlist *s = sg, *dma = sg, *start = sg;
@@ -1734,7 +1733,7 @@ bad_mapping:
  * obtained via sg_dma_{address,length}.
  */
 int arm_coherent_iommu_map_sg(struct device *dev, struct scatterlist *sg,
-               int nents, enum dma_data_direction dir, struct dma_attrs *attrs)
+               int nents, enum dma_data_direction dir, unsigned long attrs)
 {
        return __iommu_map_sg(dev, sg, nents, dir, attrs, true);
 }
@@ -1752,14 +1751,14 @@ int arm_coherent_iommu_map_sg(struct device *dev, 
struct scatterlist *sg,
  * sg_dma_{address,length}.
  */
 int arm_iommu_map_sg(struct device *dev, struct scatterlist *sg,
-               int nents, enum dma_data_direction dir, struct dma_attrs *attrs)
+               int nents, enum dma_data_direction dir, unsigned long attrs)
 {
        return __iommu_map_sg(dev, sg, nents, dir, attrs, false);
 }
 
 static void __iommu_unmap_sg(struct device *dev, struct scatterlist *sg,
-               int nents, enum dma_data_direction dir, struct dma_attrs *attrs,
-               bool is_coherent)
+               int nents, enum dma_data_direction dir,
+               unsigned long attrs, bool is_coherent)
 {
        struct scatterlist *s;
        int i;
@@ -1786,7 +1785,8 @@ static void __iommu_unmap_sg(struct device *dev, struct 
scatterlist *sg,
  * rules concerning calls here are the same as for dma_unmap_single().
  */
 void arm_coherent_iommu_unmap_sg(struct device *dev, struct scatterlist *sg,
-               int nents, enum dma_data_direction dir, struct dma_attrs *attrs)
+               int nents, enum dma_data_direction dir,
+               unsigned long attrs)
 {
        __iommu_unmap_sg(dev, sg, nents, dir, attrs, true);
 }
@@ -1802,7 +1802,8 @@ void arm_coherent_iommu_unmap_sg(struct device *dev, 
struct scatterlist *sg,
  * rules concerning calls here are the same as for dma_unmap_single().
  */
 void arm_iommu_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
-                       enum dma_data_direction dir, struct dma_attrs *attrs)
+                       enum dma_data_direction dir,
+                       unsigned long attrs)
 {
        __iommu_unmap_sg(dev, sg, nents, dir, attrs, false);
 }
@@ -1855,7 +1856,7 @@ void arm_iommu_sync_sg_for_device(struct device *dev, 
struct scatterlist *sg,
  */
 static dma_addr_t arm_coherent_iommu_map_page(struct device *dev, struct page 
*page,
             unsigned long offset, size_t size, enum dma_data_direction dir,
-            struct dma_attrs *attrs)
+            unsigned long attrs)
 {
        struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
        dma_addr_t dma_addr;
@@ -1889,7 +1890,7 @@ fail:
  */
 static dma_addr_t arm_iommu_map_page(struct device *dev, struct page *page,
             unsigned long offset, size_t size, enum dma_data_direction dir,
-            struct dma_attrs *attrs)
+            unsigned long attrs)
 {
        if (!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
                __dma_page_cpu_to_dev(page, offset, size, dir);
@@ -1907,8 +1908,7 @@ static dma_addr_t arm_iommu_map_page(struct device *dev, 
struct page *page,
  * Coherent IOMMU aware version of arm_dma_unmap_page()
  */
 static void arm_coherent_iommu_unmap_page(struct device *dev, dma_addr_t 
handle,
-               size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs)
+               size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
        struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
        dma_addr_t iova = handle & PAGE_MASK;
@@ -1932,8 +1932,7 @@ static void arm_coherent_iommu_unmap_page(struct device 
*dev, dma_addr_t handle,
  * IOMMU aware version of arm_dma_unmap_page()
  */
 static void arm_iommu_unmap_page(struct device *dev, dma_addr_t handle,
-               size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs)
+               size_t size, enum dma_data_direction dir, unsigned long attrs)
 {
        struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
        dma_addr_t iova = handle & PAGE_MASK;
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
index c5f9a9e3d1f3..fc67ed236a10 100644
--- a/arch/arm/xen/mm.c
+++ b/arch/arm/xen/mm.c
@@ -98,7 +98,7 @@ static void __xen_dma_page_cpu_to_dev(struct device *hwdev, 
dma_addr_t handle,
 
 void __xen_dma_map_page(struct device *hwdev, struct page *page,
             dma_addr_t dev_addr, unsigned long offset, size_t size,
-            enum dma_data_direction dir, struct dma_attrs *attrs)
+            enum dma_data_direction dir, unsigned long attrs)
 {
        if (is_device_dma_coherent(hwdev))
                return;
@@ -110,7 +110,7 @@ void __xen_dma_map_page(struct device *hwdev, struct page 
*page,
 
 void __xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
                size_t size, enum dma_data_direction dir,
-               struct dma_attrs *attrs)
+               unsigned long attrs)
 
 {
        if (is_device_dma_coherent(hwdev))
-- 
1.9.1


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