treewide: Constify most dma_map_ops structures

Most dma_map_ops structures are never modified. Constify these
structures such that these can be write-protected. This patch
has been generated as follows:

git grep -l 'struct dma_map_ops' |
  xargs -d\\n sed -i \
    -e 's/struct dma_map_ops/const struct dma_map_ops/g' \
    -e 's/const struct dma_map_ops {/struct dma_map_ops {/g' \
    -e 's/^const struct dma_map_ops;$/struct dma_map_ops;/' \
    -e 's/const const struct dma_map_ops /const struct dma_map_ops /g';
sed -i -e 's/const \(struct dma_map_ops intel_dma_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops intel_dma_ops');
sed -i -e 's/const \(struct dma_map_ops dma_iommu_ops\)/\1/' \
  $(git grep -l 'struct dma_map_ops' | grep ^arch/powerpc);
sed -i -e '/^struct vmd_dev {$/,/^};$/ s/const \(struct dma_map_ops[[:blank:]]dma_ops;\)/\1/' \
       -e '/^static void vmd_setup_dma_ops/,/^}$/ s/const \(struct dma_map_ops \*dest\)/\1/' \
       -e 's/const \(struct dma_map_ops \*dest = \&vmd->dma_ops\)/\1/' \
    drivers/pci/host/*.c
sed -i -e '/^void __init pci_iommu_alloc(void)$/,/^}$/ s/dma_ops->/intel_dma_ops./' arch/ia64/kernel/pci-dma.c
sed -i -e 's/static const struct dma_map_ops sn_dma_ops/static struct dma_map_ops sn_dma_ops/' arch/ia64/sn/pci/pci_dma.c
sed -i -e 's/(const struct dma_map_ops \*)//' drivers/misc/mic/bus/vop_bus.c

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Russell King <linux@armlinux.org.uk>
Cc: x86@kernel.org
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 11 insertions, 11 deletions

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index ab7710002ba6..d26fe1a35687 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -180,7 +180,7 @@ static void arm_dma_sync_single_for_device(struct device *dev,
         __dma_page_cpu_to_dev(page, offset, size, dir);
 }
 
-struct dma_map_ops arm_dma_ops = {
+const struct dma_map_ops arm_dma_ops = {
         .alloc                  = arm_dma_alloc,
         .free                   = arm_dma_free,
         .mmap                   = arm_dma_mmap,
@@ -204,7 +204,7 @@ 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,
                  unsigned long attrs);
 
-struct dma_map_ops arm_coherent_dma_ops = {
+const struct dma_map_ops arm_coherent_dma_ops = {
         .alloc                  = arm_coherent_dma_alloc,
         .free                   = arm_coherent_dma_free,
         .mmap                   = arm_coherent_dma_mmap,
@@ -1067,7 +1067,7 @@ static void __dma_page_dev_to_cpu(struct page *page, unsigned long off,
 int arm_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
                 enum dma_data_direction dir, unsigned long attrs)
 {
-        struct dma_map_ops *ops = get_dma_ops(dev);
+        const struct dma_map_ops *ops = get_dma_ops(dev);
         struct scatterlist *s;
         int i, j;
 
@@ -1101,7 +1101,7 @@ int arm_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 void arm_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
                 enum dma_data_direction dir, unsigned long attrs)
 {
-        struct dma_map_ops *ops = get_dma_ops(dev);
+        const struct dma_map_ops *ops = get_dma_ops(dev);
         struct scatterlist *s;
 
         int i;
@@ -1120,7 +1120,7 @@ void arm_dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nents,
 void arm_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
                         int nents, enum dma_data_direction dir)
 {
-        struct dma_map_ops *ops = get_dma_ops(dev);
+        const struct dma_map_ops *ops = get_dma_ops(dev);
         struct scatterlist *s;
         int i;
 
@@ -1139,7 +1139,7 @@ void arm_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
 void arm_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
                         int nents, enum dma_data_direction dir)
 {
-        struct dma_map_ops *ops = get_dma_ops(dev);
+        const struct dma_map_ops *ops = get_dma_ops(dev);
         struct scatterlist *s;
         int i;
 
@@ -2099,7 +2099,7 @@ static void arm_iommu_sync_single_for_device(struct device *dev,
         __dma_page_cpu_to_dev(page, offset, size, dir);
 }
 
-struct dma_map_ops iommu_ops = {
+const struct dma_map_ops iommu_ops = {
         .alloc          = arm_iommu_alloc_attrs,
         .free           = arm_iommu_free_attrs,
         .mmap           = arm_iommu_mmap_attrs,
@@ -2119,7 +2119,7 @@ struct dma_map_ops iommu_ops = {
         .unmap_resource         = arm_iommu_unmap_resource,
 };
 
-struct dma_map_ops iommu_coherent_ops = {
+const struct dma_map_ops iommu_coherent_ops = {
         .alloc          = arm_coherent_iommu_alloc_attrs,
         .free           = arm_coherent_iommu_free_attrs,
         .mmap           = arm_coherent_iommu_mmap_attrs,
@@ -2319,7 +2319,7 @@ void arm_iommu_detach_device(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(arm_iommu_detach_device);
 
-static struct dma_map_ops *arm_get_iommu_dma_map_ops(bool coherent)
+static const struct dma_map_ops *arm_get_iommu_dma_map_ops(bool coherent)
 {
         return coherent ? &iommu_coherent_ops : &iommu_ops;
 }
@@ -2374,7 +2374,7 @@ static void arm_teardown_iommu_dma_ops(struct device *dev) { }
 
 #endif  /* CONFIG_ARM_DMA_USE_IOMMU */
 
-static struct dma_map_ops *arm_get_dma_map_ops(bool coherent)
+static const struct dma_map_ops *arm_get_dma_map_ops(bool coherent)
 {
         return coherent ? &arm_coherent_dma_ops : &arm_dma_ops;
 }
@@ -2382,7 +2382,7 @@ static struct dma_map_ops *arm_get_dma_map_ops(bool coherent)
 void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
                         const struct iommu_ops *iommu, bool coherent)
 {
-        struct dma_map_ops *dma_ops;
+        const struct dma_map_ops *dma_ops;
 
         dev->archdata.dma_coherent = coherent;
         if (arm_setup_iommu_dma_ops(dev, dma_base, size, iommu))