1 files changed, 13 insertions, 10 deletions

diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c
index b41a79fcdbd9..4d5b8bd1d795 100644
--- a/arch/openrisc/kernel/dma.c
+++ b/arch/openrisc/kernel/dma.c
@@ -16,6 +16,7 @@
  */
 
 #include <linux/dma-noncoherent.h>
+#include <linux/pagewalk.h>
 
 #include <asm/cpuinfo.h>
 #include <asm/spr_defs.h>
@@ -43,6 +44,10 @@ page_set_nocache(pte_t *pte, unsigned long addr,
 	return 0;
 }
 
+static const struct mm_walk_ops set_nocache_walk_ops = {
+	.pte_entry		= page_set_nocache,
+};
+
 static int
 page_clear_nocache(pte_t *pte, unsigned long addr,
 		   unsigned long next, struct mm_walk *walk)
@@ -58,6 +63,10 @@ page_clear_nocache(pte_t *pte, unsigned long addr,
 	return 0;
 }
 
+static const struct mm_walk_ops clear_nocache_walk_ops = {
+	.pte_entry		= page_clear_nocache,
+};
+
 /*
  * Alloc "coherent" memory, which for OpenRISC means simply uncached.
  *
@@ -80,10 +89,6 @@ arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 {
 	unsigned long va;
 	void *page;
-	struct mm_walk walk = {
-		.pte_entry = page_set_nocache,
-		.mm = &init_mm
-	};
 
 	page = alloc_pages_exact(size, gfp | __GFP_ZERO);
 	if (!page)
@@ -98,7 +103,8 @@ arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 	 * We need to iterate through the pages, clearing the dcache for
 	 * them and setting the cache-inhibit bit.
 	 */
-	if (walk_page_range(va, va + size, &walk)) {
+	if (walk_page_range(&init_mm, va, va + size, &set_nocache_walk_ops,
+			NULL)) {
 		free_pages_exact(page, size);
 		return NULL;
 	}
@@ -111,13 +117,10 @@ arch_dma_free(struct device *dev, size_t size, void *vaddr,
 		dma_addr_t dma_handle, unsigned long attrs)
 {
 	unsigned long va = (unsigned long)vaddr;
-	struct mm_walk walk = {
-		.pte_entry = page_clear_nocache,
-		.mm = &init_mm
-	};
 
 	/* walk_page_range shouldn't be able to fail here */
-	WARN_ON(walk_page_range(va, va + size, &walk));
+	WARN_ON(walk_page_range(&init_mm, va, va + size,
+			&clear_nocache_walk_ops, NULL));
 
 	free_pages_exact(vaddr, size);
 }