162 	if (idx == sh->pd_idx)  in raid6_idx_to_slot()
1079 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor()  local
1083 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor()
1143 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
1157 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
1184 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
1197 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
1204 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
1207 			if (i != pd_idx)  in ops_run_reconstruct5()
1264 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
1277 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
1280 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
1887 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
1915 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
1918 		pd_idx = data_disks;  in raid5_compute_sector()
1923 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1924 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
1928 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1929 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
1933 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1934 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
1937 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1938 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
1941 			pd_idx = 0;  in raid5_compute_sector()
1945 			pd_idx = data_disks;  in raid5_compute_sector()
1955 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1956 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
1957 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
1960 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
1964 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1965 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
1966 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
1969 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
1973 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1974 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
1975 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
1978 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1979 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
1980 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
1984 			pd_idx = 0;  in raid5_compute_sector()
1989 			pd_idx = data_disks;  in raid5_compute_sector()
1997 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
1998 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
1999 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2002 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2013 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2014 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2015 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2018 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2025 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2026 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
2027 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2033 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2034 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2040 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2041 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2047 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2048 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
2053 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2054 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
2059 			pd_idx = 0;  in raid5_compute_sector()
2071 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
2104 	if (i == sh->pd_idx)  in compute_blocknr()
2112 			if (i > sh->pd_idx)  in compute_blocknr()
2117 			if (i < sh->pd_idx)  in compute_blocknr()
2119 			i -= (sh->pd_idx + 1);  in compute_blocknr()
2138 			if (sh->pd_idx == raid_disks-1)  in compute_blocknr()
2140 			else if (i > sh->pd_idx)  in compute_blocknr()
2145 			if (sh->pd_idx == raid_disks-1)  in compute_blocknr()
2149 				if (i < sh->pd_idx)  in compute_blocknr()
2151 				i -= (sh->pd_idx + 2);  in compute_blocknr()
2161 			if (sh->pd_idx == 0)  in compute_blocknr()
2165 				if (i < sh->pd_idx)  in compute_blocknr()
2167 				i -= (sh->pd_idx + 1);  in compute_blocknr()
2172 			if (i > sh->pd_idx)  in compute_blocknr()
2177 			if (i < sh->pd_idx)  in compute_blocknr()
2179 			i -= (sh->pd_idx + 1);  in compute_blocknr()
2195 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in compute_blocknr()
2209 	int i, pd_idx = sh->pd_idx, disks = sh->disks;  in schedule_reconstruction()  local
2242 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
2243 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
2252 			if (i == pd_idx)  in schedule_reconstruction()
2269 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
2270 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
2716 		if ((dev->towrite || i == sh->pd_idx) &&  in handle_stripe_dirtying()
2726 		if (!test_bit(R5_OVERWRITE, &dev->flags) && i != sh->pd_idx &&  in handle_stripe_dirtying()
2742 			if ((dev->towrite || i == sh->pd_idx) &&  in handle_stripe_dirtying()
2766 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
2817 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
2826 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
2873 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
2874 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
2895 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
2934 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
2973 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
3030 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
3031 					*target = pd_idx;  in handle_parity_checks6()
3064 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
3095 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
3337 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
3383 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
3384 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
3385 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
3424 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
3430 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
3437 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
4241 			if (j == sh->pd_idx)  in reshape_request()