1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 43bdab769fc3..74d691ee9121 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -78,7 +78,7 @@ static inline struct page *ksm_might_need_to_copy(struct page *page,
         struct anon_vma *anon_vma = page_anon_vma(page);
 
         if (!anon_vma ||
-            (anon_vma == vma->anon_vma &&
+            (anon_vma->root == vma->anon_vma->root &&
              page->index == linear_page_index(vma, address)))
                 return page;