3 files changed, 14 insertions, 10 deletions

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 310e479309e..f1ef5613ccd 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -490,26 +490,30 @@ core_initcall(consistent_init);
  */
 void dma_cache_maint(const void *start, size_t size, int direction)
 {
-        const void *end = start + size;
+        void (*inner_op)(const void *, const void *);
+        void (*outer_op)(unsigned long, unsigned long);
 
-        BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end - 1));
+        BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(start + size - 1));
 
         switch (direction) {
         case DMA_FROM_DEVICE:           /* invalidate only */
-                dmac_inv_range(start, end);
-                outer_inv_range(__pa(start), __pa(end));
+                inner_op = dmac_inv_range;
+                outer_op = outer_inv_range;
                 break;
         case DMA_TO_DEVICE:             /* writeback only */
-                dmac_clean_range(start, end);
-                outer_clean_range(__pa(start), __pa(end));
+                inner_op = dmac_clean_range;
+                outer_op = outer_clean_range;
                 break;
         case DMA_BIDIRECTIONAL:         /* writeback and invalidate */
-                dmac_flush_range(start, end);
-                outer_flush_range(__pa(start), __pa(end));
+                inner_op = dmac_flush_range;
+                outer_op = outer_flush_range;
                 break;
         default:
                 BUG();
         }
+
+        inner_op(start, start + size);
+        outer_op(__pa(start), __pa(start) + size);
 }
 EXPORT_SYMBOL(dma_cache_maint);
 
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 34df4d9d03a..80fd3b69ae1 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -382,7 +382,7 @@ void __init bootmem_init(void)
         for_each_node(node)
                 bootmem_free_node(node, mi);
 
-        high_memory = __va(memend_pfn << PAGE_SHIFT);
+        high_memory = __va((memend_pfn << PAGE_SHIFT) - 1) + 1;
 
         /*
          * This doesn't seem to be used by the Linux memory manager any
diff --git a/arch/arm/mm/mmap.c b/arch/arm/mm/mmap.c
index 5358fcc7f61..f7457fea6de 100644
--- a/arch/arm/mm/mmap.c
+++ b/arch/arm/mm/mmap.c
@@ -124,7 +124,7 @@ int valid_phys_addr_range(unsigned long addr, size_t size)
 {
         if (addr < PHYS_OFFSET)
                 return 0;
-        if (addr + size > __pa(high_memory))
+        if (addr + size >= __pa(high_memory - 1))
                 return 0;
 
         return 1;