194 	if (sh->qd_idx == sh->disks - 1)  in raid6_d0()
197 		return sh->qd_idx + 1;  in raid6_d0()
219 	if (idx == sh->qd_idx)  in raid6_idx_to_slot()
807 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1354 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1373 	int qd_idx = sh->qd_idx;  in ops_run_compute6_1()  local
1399 	if (target == qd_idx) {  in ops_run_compute6_1()
1411 			if (i == target || i == qd_idx)  in ops_run_compute6_1()
1486 			int qd_idx = sh->qd_idx;  in ops_run_compute6_2()  local
1489 			if (target == qd_idx)  in ops_run_compute6_2()
1496 				if (i == data_target || i == qd_idx)  in ops_run_compute6_2()
1659 	int qd_idx = sh->qd_idx;  in ops_complete_reconstruct()  local
1675 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
1799 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
1807 		set_bit(R5_Discard, &sh->dev[sh->qd_idx].flags);  in ops_run_reconstruct6()
1860 	int qd_idx = sh->qd_idx;  in ops_run_check_p()  local
1876 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2543 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
2571 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
2612 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2615 				qd_idx = 0;  in raid5_compute_sector()
2621 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2624 				qd_idx = 0;  in raid5_compute_sector()
2630 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
2635 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
2641 			qd_idx = 1;  in raid5_compute_sector()
2646 			qd_idx = data_disks + 1;  in raid5_compute_sector()
2654 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2657 				qd_idx = 0;  in raid5_compute_sector()
2670 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2673 				qd_idx = 0;  in raid5_compute_sector()
2682 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
2692 			qd_idx = raid_disks - 1;  in raid5_compute_sector()
2699 			qd_idx = raid_disks - 1;  in raid5_compute_sector()
2705 			qd_idx = raid_disks - 1;  in raid5_compute_sector()
2711 			qd_idx = raid_disks - 1;  in raid5_compute_sector()
2717 			qd_idx = raid_disks - 1;  in raid5_compute_sector()
2728 		sh->qd_idx = qd_idx;  in raid5_compute_sector()
2785 		if (i == sh->qd_idx)  in compute_blocknr()
2850 		|| sh2.qd_idx != sh->qd_idx) {  in compute_blocknr()
2862 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
2901 			(!(test_bit(R5_UPTODATE, &sh->dev[qd_idx].flags) ||  in schedule_reconstruction()
2902 			   test_bit(R5_Wantcompute, &sh->dev[qd_idx].flags))));  in schedule_reconstruction()
2906 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
2935 		int qd_idx = sh->qd_idx;  in schedule_reconstruction()  local
2936 		struct r5dev *dev = &sh->dev[qd_idx];  in schedule_reconstruction()
3338 		    s->failed_num[i] != sh->qd_idx &&  in need_this_block()
3512 		if (sh->qd_idx >= 0) {  in handle_stripe_clean_event()
3513 			clear_bit(R5_Discard, &sh->dev[sh->qd_idx].flags);  in handle_stripe_clean_event()
3514 			clear_bit(R5_UPTODATE, &sh->dev[sh->qd_idx].flags);  in handle_stripe_clean_event()
3577 		if ((dev->towrite || i == sh->pd_idx || i == sh->qd_idx) &&  in handle_stripe_dirtying()
3588 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
3609 			if ((dev->towrite || i == sh->pd_idx || i == sh->qd_idx) &&  in handle_stripe_dirtying()
3635 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
3774 	int qd_idx = sh->qd_idx;  in handle_parity_checks6()  local
3858 			dev = &sh->dev[qd_idx];  in handle_parity_checks6()
3916 						&sh->dev[qd_idx].flags);  in handle_parity_checks6()
3917 					*target = qd_idx;  in handle_parity_checks6()
3944 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
3976 				    j != sh2->qd_idx &&  in handle_stripe_expansion()
4323 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
4381 		BUG_ON(sh->qd_idx >= 0 &&  in handle_stripe()
4382 		       !test_bit(R5_UPTODATE, &sh->dev[sh->qd_idx].flags) &&  in handle_stripe()
4383 		       !test_bit(R5_Discard, &sh->dev[sh->qd_idx].flags));  in handle_stripe()
4387 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
4396 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
4412 	qdev = &sh->dev[sh->qd_idx];  in handle_stripe()
4413 	s.q_failed = (s.failed >= 1 && s.failed_num[0] == sh->qd_idx)  in handle_stripe()
4414 		|| (s.failed >= 2 && s.failed_num[1] == sh->qd_idx)  in handle_stripe()
5100 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5114 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5483 			    j == sh->qd_idx)  in reshape_request()