163 	ttm->backup = NULL;  in ttm_tt_init_fields()
190 	if (ttm->backup) {  in ttm_tt_fini()
191 		ttm_backup_fini(ttm->backup);  in ttm_tt_fini()
192 		ttm->backup = NULL;  in ttm_tt_fini()
270  * @flags: Flags that govern the backup behaviour.
283 	if (WARN_ON(IS_ERR_OR_NULL(tt->backup)))  in ttm_tt_backup()
536  * ttm_tt_setup_backup() - Allocate and assign a backup structure for a ttm_tt
537  * @tt: The ttm_tt for wich to allocate and assign a backup structure.
539  * Assign a backup structure to be used for tt backup. This should
547 	struct file *backup =  in ttm_tt_setup_backup()  local
553 	if (IS_ERR(backup))  in ttm_tt_setup_backup()
554 		return PTR_ERR(backup);  in ttm_tt_setup_backup()
556 	if (tt->backup)  in ttm_tt_setup_backup()
557 		ttm_backup_fini(tt->backup);  in ttm_tt_setup_backup()
559 	tt->backup = backup;  in ttm_tt_setup_backup()