30     int		    fill;	// filler lines  member
340 		loff.fill = 0;  in update_topline()
346 			&& (loff.lnum + 1 < curwin->w_botline || loff.fill == 0)  in update_topline()
452 	loff.fill = 0;  in check_top_offset()
464 		    || (loff.lnum == curwin->w_topline && loff.fill > 0)  in check_top_offset()
1681     if (lp->fill < diff_check_fill(curwin, lp->lnum))  in topline_back()
1684 	++lp->fill;  in topline_back()
1692 	lp->fill = 0;  in topline_back()
1717     if (lp->fill < diff_check_fill(curwin, lp->lnum + 1))  in botline_forw()
1720 	++lp->fill;  in botline_forw()
1728 	lp->fill = 0;  in botline_forw()
1752     if (lp->fill > 0)  in botline_topline()
1755 	lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;  in botline_topline()
1767     if (lp->fill > 0)  in topline_botline()
1769 	lp->fill = diff_check_fill(curwin, lp->lnum) - lp->fill + 1;  in topline_botline()
1976 	loff.fill = 0;  in scroll_cursor_bot()
1988 	    curwin->w_topfill = loff.fill;  in scroll_cursor_bot()
2036     loff.fill = 0;  in scroll_cursor_bot()
2037     boff.fill = 0;  in scroll_cursor_bot()
2052 		    || loff.fill >= fill_below_window)  in scroll_cursor_bot()
2068 		    || loff.fill <= fill_below_window)  in scroll_cursor_bot()
2076 			    && loff.fill == 0  in scroll_cursor_bot()
2096 			    && boff.fill > curwin->w_filler_rows)  in scroll_cursor_bot()
2104 			    && boff.fill == 0  in scroll_cursor_bot()
2124 	boff.fill = curwin->w_topfill;  in scroll_cursor_bot()
2190     loff.fill = 0;  in scroll_cursor_halfway()
2191     boff.fill = 0;  in scroll_cursor_halfway()
2228 	    topfill = loff.fill;  in scroll_cursor_halfway()
2415 	loff.fill = 0;  in onepage()
2445 		loff.fill = diff_check_fill(curwin, loff.lnum)  in onepage()
2451 		curwin->w_topfill = loff.fill;  in onepage()
2489 	    loff.fill = diff_check_fill(curwin, loff.lnum + 1)  in onepage()
2498 		loff.fill = 0;  in onepage()
2547 			    || loff.fill >= curwin->w_topfill)  in onepage()
2554 		    loff.fill = curwin->w_topfill;  in onepage()
2558 		    if (curwin->w_topfill == loff.fill)  in onepage()
2575 		    curwin->w_topfill = loff.fill;  in onepage()
2639     if (lp->fill > 0)  in get_scroll_overlap()