diff --git a/mm/truncate.c b/mm/truncate.c
index 5b4c3a4..29a9b8a 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -619,9 +619,9 @@
 	mutex_lock(&inode->i_mutex);
 	down_write(&inode->i_alloc_sem);
 	unmap_mapping_range(mapping, offset, (end - offset), 1);
-	truncate_inode_pages_range(mapping, offset, end);
-	unmap_mapping_range(mapping, offset, (end - offset), 1);
 	inode->i_op->truncate_range(inode, offset, end);
+	/* unmap again to remove racily COWed private pages */
+	unmap_mapping_range(mapping, offset, (end - offset), 1);
 	up_write(&inode->i_alloc_sem);
 	mutex_unlock(&inode->i_mutex);