rmap: add exclusive page to private anon_vma on swapin

[net-next-2.6.git] / mm / rmap.c

diff --git a/mm/rmap.c b/mm/rmap.c
index 4d152a6d3a89a5cf7a12ac22235bbe1282041583..a7d0f5482634d00724d91ebcf42cba4073cab20e 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -829,6 +829,17 @@ static void __page_check_anon_rmap(struct page *page,
  */
 void page_add_anon_rmap(struct page *page,
        struct vm_area_struct *vma, unsigned long address)
+{
+       do_page_add_anon_rmap(page, vma, address, 0);
+}
+
+/*
+ * Special version of the above for do_swap_page, which often runs
+ * into pages that are exclusively owned by the current process.
+ * Everybody else should continue to use page_add_anon_rmap above.
+ */
+void do_page_add_anon_rmap(struct page *page,
+       struct vm_area_struct *vma, unsigned long address, int exclusive)
 {
        int first = atomic_inc_and_test(&page->_mapcount);
        if (first)
@@ -839,7 +850,7 @@ void page_add_anon_rmap(struct page *page,
        VM_BUG_ON(!PageLocked(page));
        VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
        if (first)
-               __page_set_anon_rmap(page, vma, address, 0);
+               __page_set_anon_rmap(page, vma, address, exclusive);
        else
                __page_check_anon_rmap(page, vma, address);
 }