164     if (uhp == curbuf->b_u_newhead && ++seen_b_u_newhead > 1)  in u_check_tree()
216 	    && !(newhead_may_be_NULL && curbuf->b_u_newhead == NULL))  in u_check()
217 	semsg("b_u_newhead invalid: 0x%x", curbuf->b_u_newhead);  in u_check()
528 	    curbuf->b_u_newhead = old_curhead->uh_next.ptr;  in u_savecommon()
567 	uhp->uh_next.ptr = curbuf->b_u_newhead;  in u_savecommon()
580 	if (curbuf->b_u_newhead != NULL)  in u_savecommon()
581 	    curbuf->b_u_newhead->uh_prev.ptr = uhp;  in u_savecommon()
606 	curbuf->b_u_newhead = uhp;  in u_savecommon()
636 		if ((curbuf->b_u_newhead->uh_getbot_entry != uep  in u_savecommon()
665 			uep->ue_next = curbuf->b_u_newhead->uh_entry;  in u_savecommon()
666 			curbuf->b_u_newhead->uh_entry = uep;  in u_savecommon()
677 			curbuf->b_u_newhead->uh_getbot_entry = uep;  in u_savecommon()
723 	curbuf->b_u_newhead->uh_getbot_entry = uep;  in u_savecommon()
750     uep->ue_next = curbuf->b_u_newhead->uh_entry;  in u_savecommon()
751     curbuf->b_u_newhead->uh_entry = uep;  in u_savecommon()
1261     put_header_ptr(bi, buf->b_u_newhead);  in serialize_header()
2143     curbuf->b_u_newhead = new_idx < 0 ? NULL : uhp_table[new_idx];  in u_read_undo()
2259 		curbuf->b_u_curhead = curbuf->b_u_newhead;  in u_doit()
2297 		curbuf->b_u_newhead = curbuf->b_u_curhead;  in u_doit()
2366 		    uhp = curbuf->b_u_newhead;  in undo_time()
2440 	    uhp = curbuf->b_u_newhead;  in undo_time()
2561 		uhp = curbuf->b_u_newhead;  in undo_time()
2637 		    curbuf->b_u_newhead = uhp;  in undo_time()
3019 	uhp = curbuf->b_u_newhead;  in u_undo_end()
3181     if (curbuf->b_u_newhead == NULL)  in ex_undojoin()
3215     u_header_T	*uhp = curbuf->b_u_newhead;  in u_find_first_changed()
3263 	uhp = buf->b_u_newhead;  in u_update_save_nr()
3288     if (curbuf->b_u_newhead == NULL || curbuf->b_u_newhead->uh_entry == NULL)  in u_get_headentry()
3293     return curbuf->b_u_newhead->uh_entry;  in u_get_headentry()
3310     uep = curbuf->b_u_newhead->uh_getbot_entry;  in u_getbot()
3329 	curbuf->b_u_newhead->uh_getbot_entry = NULL;  in u_getbot()
3361 	buf->b_u_newhead = uhp->uh_next.ptr;  in u_freeheader()
3419     if (buf->b_u_newhead == uhp)  in u_freeentries()
3420 	buf->b_u_newhead = NULL;  // freeing the newest entry  in u_freeentries()
3458     buf->b_u_newhead = buf->b_u_oldhead = buf->b_u_curhead = NULL;  in u_clearall()
3624 	if (uhp == curbuf->b_u_newhead)  in u_eval_tree()