1 files changed, 13 insertions, 7 deletions

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 1aa664a1999f..db23ae4aaaab 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -214,7 +214,8 @@ static int __init consistent_init(void)
 core_initcall(consistent_init);
 
 static void *
-__dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
+__dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot,
+        const void *caller)
 {
         struct arm_vmregion *c;
         size_t align;
@@ -241,7 +242,7 @@ __dma_alloc_remap(struct page *page, size_t size, gfp_t gfp, pgprot_t prot)
          * Allocate a virtual address in the consistent mapping region.
          */
         c = arm_vmregion_alloc(&consistent_head, align, size,
-                            gfp & ~(__GFP_DMA | __GFP_HIGHMEM));
+                            gfp & ~(__GFP_DMA | __GFP_HIGHMEM), caller);
         if (c) {
                 pte_t *pte;
                 int idx = CONSISTENT_PTE_INDEX(c->vm_start);
@@ -320,14 +321,14 @@ static void __dma_free_remap(void *cpu_addr, size_t size)
 
 #else   /* !CONFIG_MMU */
 
-#define __dma_alloc_remap(page, size, gfp, prot)        page_address(page)
+#define __dma_alloc_remap(page, size, gfp, prot, c)     page_address(page)
 #define __dma_free_remap(addr, size)                    do { } while (0)
 
 #endif  /* CONFIG_MMU */
 
 static void *
 __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
-            pgprot_t prot)
+            pgprot_t prot, const void *caller)
 {
         struct page *page;
         void *addr;
@@ -349,7 +350,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
                 return NULL;
 
         if (!arch_is_coherent())
-                addr = __dma_alloc_remap(page, size, gfp, prot);
+                addr = __dma_alloc_remap(page, size, gfp, prot, caller);
         else
                 addr = page_address(page);
 
@@ -374,7 +375,8 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gf
                 return memory;
 
         return __dma_alloc(dev, size, handle, gfp,
-                           pgprot_dmacoherent(pgprot_kernel));
+                           pgprot_dmacoherent(pgprot_kernel),
+                           __builtin_return_address(0));
 }
 EXPORT_SYMBOL(dma_alloc_coherent);
 
@@ -386,7 +388,8 @@ void *
 dma_alloc_writecombine(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
 {
         return __dma_alloc(dev, size, handle, gfp,
-                           pgprot_writecombine(pgprot_kernel));
+                           pgprot_writecombine(pgprot_kernel),
+                           __builtin_return_address(0));
 }
 EXPORT_SYMBOL(dma_alloc_writecombine);
 
@@ -723,6 +726,9 @@ EXPORT_SYMBOL(dma_set_mask);
 
 static int __init dma_debug_do_init(void)
 {
+#ifdef CONFIG_MMU
+        arm_vmregion_create_proc("dma-mappings", &consistent_head);
+#endif
         dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
         return 0;
 }