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Re: [Xen-devel] [PATCH 07/14] xen: mark grant mapped pages as foreign



On 01/12/2015 10:43 AM, David Vrabel wrote:
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 8d6e97c..9c7dc75 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -679,12 +679,27 @@ EXPORT_SYMBOL_GPL(gnttab_free_auto_xlat_frames);
   */
  int gnttab_alloc_pages(int nr_pages, struct page **pages)
  {
+       int i;
        int ret;
ret = alloc_xenballooned_pages(nr_pages, pages, false);
        if (ret < 0)
                return ret;
+ for (i = 0; i < nr_pages; i++) {
+#if BITS_PER_LONG < 64
+               struct xen_page_foreign *foreign;
+
+               foreign = kzalloc(sizeof(*foreign), GFP_KERNEL);
+               if (!foreign) {
+                       gnttab_free_pages(nr_pages, pages);
+                       return -ENOMEM;
+               }
+               set_page_set_private(pages[i], (unsigned long)foreign);

set_page_private() ?

-boris


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