* bdi.wb->list_lock (zap_pte_range->set_page_dirty)
* ->inode->i_lock (zap_pte_range->set_page_dirty)
* ->private_lock (zap_pte_range->block_dirty_folio)
- *
- * ->i_mmap_rwsem
- * ->tasklist_lock (memory_failure, collect_procs_ao)
*/
static void page_cache_delete(struct address_space *mapping,