175 	if (uhp->uh_next.ptr != exp_uh_next)  in u_check_tree()
179 					       exp_uh_next, uhp->uh_next.ptr);  in u_check_tree()
199 	u_check_tree(uhp->uh_alt_next.ptr, uhp->uh_next.ptr, uhp);  in u_check_tree()
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()
1290     put_header_ptr(bi, uhp->uh_next.ptr);  in serialize_uhp()
1339     uhp->uh_next.seq = undo_read_4c(bi);  in unserialize_uhp()
1765 	else if (uhp->uh_next.ptr != NULL && uhp->uh_alt_prev.ptr == NULL  in u_write_undo()
1766 					 && uhp->uh_next.ptr->uh_walk != mark)  in u_write_undo()
1767 	    uhp = uhp->uh_next.ptr;  in u_write_undo()
1771 	    uhp = uhp->uh_next.ptr;  in u_write_undo()
2092 				  && uhp_table[j]->uh_seq == uhp->uh_next.seq)  in u_read_undo()
2094 		uhp->uh_next.ptr = uhp_table[j];  in u_read_undo()
2262 		curbuf->b_u_curhead = curbuf->b_u_curhead->uh_next.ptr;  in u_doit()
2364 		    uhp = uhp->uh_next.ptr;  in undo_time()
2501 	    else if (uhp->uh_next.ptr != NULL && uhp->uh_alt_prev.ptr == NULL  in undo_time()
2502 		    && uhp->uh_next.ptr->uh_walk != nomark  in undo_time()
2503 		    && uhp->uh_next.ptr->uh_walk != mark)  in undo_time()
2508 		uhp = uhp->uh_next.ptr;  in undo_time()
2518 		    uhp = uhp->uh_next.ptr;  in undo_time()
2563 		uhp = uhp->uh_next.ptr;  in undo_time()
2616 		    if (uhp->uh_next.ptr != NULL)  in undo_time()
2617 			uhp->uh_next.ptr->uh_prev.ptr = uhp;  in undo_time()
2936 	if (curhead->uh_next.ptr != NULL)  in u_undoredo()
2937 	    curbuf->b_u_seq_cur = curhead->uh_next.ptr->uh_seq;  in u_undoredo()
3008 	if (absolute && curbuf->b_u_curhead->uh_next.ptr != NULL)  in u_undo_end()
3010 	    uhp = curbuf->b_u_curhead->uh_next.ptr;  in u_undo_end()
3016 	    uhp = curbuf->b_u_curhead->uh_next.ptr;  in u_undo_end()
3131 	else if (uhp->uh_next.ptr != NULL && uhp->uh_alt_prev.ptr == NULL  in ex_undolist()
3132 		&& uhp->uh_next.ptr->uh_walk != nomark  in ex_undolist()
3133 		&& uhp->uh_next.ptr->uh_walk != mark)  in ex_undolist()
3135 	    uhp = uhp->uh_next.ptr;  in ex_undolist()
3147 		uhp = uhp->uh_next.ptr;  in ex_undolist()
3261 	uhp = uhp->uh_next.ptr;  in u_update_save_nr()
3355     if (uhp->uh_next.ptr == NULL)  in u_freeheader()
3358 	uhp->uh_next.ptr->uh_prev.ptr = uhp->uh_prev.ptr;  in u_freeheader()
3361 	buf->b_u_newhead = uhp->uh_next.ptr;  in u_freeheader()
3365 	    uhap->uh_next.ptr = uhp->uh_next.ptr;  in u_freeheader()