1 files changed, 1 insertions, 1 deletions

diff --git a/mm/migrate.c b/mm/migrate.c
index 1855f869917d..5208fa1d9712 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -682,7 +682,7 @@ skip_unmap:
 rcu_unlock:
 
         /* Drop an anon_vma reference if we took one */
-        if (anon_vma && atomic_dec_and_lock(&anon_vma->external_refcount, &anon_vma->lock)) {
+        if (anon_vma && atomic_dec_and_lock(&anon_vma->external_refcount, &anon_vma->root->lock)) {
                 int empty = list_empty(&anon_vma->head);
                 anon_vma_unlock(anon_vma);
                 if (empty)