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-rw-r--r--mm/memory.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c
index dc785b438d70..d1153e37e9ba 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2138,6 +2138,13 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
page_cache_release(old_page);
}
reuse = reuse_swap_page(old_page);
+ if (reuse)
+ /*
+ * The page is all ours. Move it to our anon_vma so
+ * the rmap code will not search our parent or siblings.
+ * Protected against the rmap code by the page lock.
+ */
+ page_move_anon_rmap(old_page, vma, address);
unlock_page(old_page);
} else if (unlikely((vma->vm_flags & (VM_WRITE|VM_SHARED)) ==
(VM_WRITE|VM_SHARED))) {