1 files changed, 1 insertions, 1 deletions

diff --git a/mm/memory.c b/mm/memory.c
index b8846cf2358a..1c0a3db78a05 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1239,7 +1239,7 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct * vma,
         }
         old_page = pfn_to_page(pfn);
 
-        if (!TestSetPageLocked(old_page)) {
+        if (PageAnon(old_page) && !TestSetPageLocked(old_page)) {
                 int reuse = can_share_swap_page(old_page);
                 unlock_page(old_page);
                 if (reuse) {