Replace VM_DONTDUMP macro for kernels older than 3.7 by VM_RESERVED

Pcie40Driver/altera_dma.c

@@ -46,7 +46,12 @@ static int altera_dma_mmap(struct file *file,struct vm_area_struct *vma ) {
     
     struct pcie40_dma_state *bk_ptr;
 
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(3,6,999)
+    vma->vm_flags |= VM_RESERVED ;
+#else    
     vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP);
+#endif
+
     size = vma->vm_end - vma->vm_start;
     
     bk_ptr = file->private_data;