150 	if (idx == sh->pd_idx)  in raid6_idx_to_slot()
283 				WARN_ON(test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags));  in do_release_stripe()
798 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1478 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1684 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor5()  local
1688 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor5()
1805 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
1822 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
1855 	int count, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
1867 		if (pd_idx == i)  in ops_run_reconstruct5()
1874 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);  in ops_run_reconstruct5()
1886 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
1894 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
1897 			if (i != pd_idx)  in ops_run_reconstruct5()
1950 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
1957 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in ops_run_reconstruct6()
2010 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
2024 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
2027 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2713 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
2741 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
2744 		pd_idx = data_disks;  in raid5_compute_sector()
2749 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2750 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2754 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2755 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2759 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2760 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2763 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2764 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2767 			pd_idx = 0;  in raid5_compute_sector()
2771 			pd_idx = data_disks;  in raid5_compute_sector()
2781 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2782 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2783 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2786 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2790 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2791 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2792 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2795 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2799 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2800 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
2801 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2804 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2805 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
2806 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2810 			pd_idx = 0;  in raid5_compute_sector()
2815 			pd_idx = data_disks;  in raid5_compute_sector()
2823 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2824 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2825 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2828 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2839 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2840 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2841 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2844 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2851 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2852 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
2853 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2859 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2860 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2866 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2867 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2873 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2874 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
2879 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2880 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
2885 			pd_idx = 0;  in raid5_compute_sector()
2897 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
2928 	if (i == sh->pd_idx)  in raid5_compute_blocknr()
2936 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
2941 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
2943 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
2962 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
2964 			else if (i > sh->pd_idx)  in raid5_compute_blocknr()
2969 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
2973 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
2975 				i -= (sh->pd_idx + 2);  in raid5_compute_blocknr()
2985 			if (sh->pd_idx == 0)  in raid5_compute_blocknr()
2989 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
2991 				i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
2996 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3001 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3003 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3019 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in raid5_compute_blocknr()
3088 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3134 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
3135 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
3142 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
3169 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3170 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3185 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))  in schedule_reconstruction()
3243 			if (i != sh->pd_idx &&  in add_stripe_bio()
3463 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_failed_sync()
3600 		if (s->failed_num[i] != sh->pd_idx &&  in need_this_block()
3640 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||  in fetch_block()
3802 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_clean_event()
3804 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
3805 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
3887 		     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
3899 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
3923 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_dirtying()
3952 			     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
3979 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4041 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4050 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
4102 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4103 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
4123 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
4163 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
4202 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
4264 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
4265 					*target = pd_idx;  in handle_parity_checks6()
4299 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
4330 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
4700 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
4765 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&  in handle_stripe()
4766 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
4773 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
4783 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
4796 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
4797 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
4798 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
4911 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_stripe()
5510 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5516 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5519 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5533 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5910 			if (j == sh->pd_idx)  in reshape_request()