- if (!vma->anon_vma) {
- BUG_ON(!next->anon_vma);
- vma->anon_vma = next->anon_vma;
- list_add(&vma->anon_vma_node, &next->anon_vma_node);
- } else {
- /* if they're both non-null they must be the same */
- BUG_ON(vma->anon_vma != next->anon_vma);
- }