141 	if (idx == sh->pd_idx)  in raid6_idx_to_slot()
274 				WARN_ON(test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags));  in do_release_stripe()
793 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1467 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1673 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor5()  local
1677 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor5()
1794 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
1811 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
1844 	int count, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
1856 		if (pd_idx == i)  in ops_run_reconstruct5()
1863 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);  in ops_run_reconstruct5()
1875 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
1883 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
1886 			if (i != pd_idx)  in ops_run_reconstruct5()
1939 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
1946 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in ops_run_reconstruct6()
1999 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
2013 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
2016 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2568 			if (sh->qd_idx >= 0 && sh->pd_idx == i)  in raid5_end_read_request()
2720 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
2748 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
2751 		pd_idx = data_disks;  in raid5_compute_sector()
2756 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2757 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2761 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2762 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2766 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2767 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2770 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2771 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2774 			pd_idx = 0;  in raid5_compute_sector()
2778 			pd_idx = data_disks;  in raid5_compute_sector()
2788 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2789 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2790 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2793 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2797 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2798 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2799 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2802 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2806 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2807 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
2808 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2811 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2812 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
2813 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2817 			pd_idx = 0;  in raid5_compute_sector()
2822 			pd_idx = data_disks;  in raid5_compute_sector()
2830 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2831 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2832 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2835 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2846 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2847 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2848 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2851 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2858 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2859 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
2860 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2866 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2867 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2873 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2874 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2880 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2881 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
2886 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
2887 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
2892 			pd_idx = 0;  in raid5_compute_sector()
2904 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
2935 	if (i == sh->pd_idx)  in raid5_compute_blocknr()
2943 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
2948 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
2950 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
2969 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
2971 			else if (i > sh->pd_idx)  in raid5_compute_blocknr()
2976 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
2980 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
2982 				i -= (sh->pd_idx + 2);  in raid5_compute_blocknr()
2992 			if (sh->pd_idx == 0)  in raid5_compute_blocknr()
2996 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
2998 				i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3003 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3008 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3010 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3026 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in raid5_compute_blocknr()
3095 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3141 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
3142 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
3149 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
3176 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3177 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3192 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))  in schedule_reconstruction()
3250 			if (i != sh->pd_idx &&  in add_stripe_bio()
3470 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_failed_sync()
3607 		if (s->failed_num[i] != sh->pd_idx &&  in need_this_block()
3647 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||  in fetch_block()
3809 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_clean_event()
3811 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
3812 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
3894 		     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
3906 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
3930 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_dirtying()
3959 			     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
3986 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4048 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4057 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
4109 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4110 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
4130 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
4170 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
4209 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
4279 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
4280 					*target = pd_idx;  in handle_parity_checks6()
4314 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
4345 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
4714 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
4779 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&  in handle_stripe()
4780 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
4787 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
4797 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
4810 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
4811 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
4812 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
4925 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_stripe()
5523 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5529 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5532 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5546 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5924 			if (j == sh->pd_idx)  in reshape_request()