142 	if (idx == sh->pd_idx)  in raid6_idx_to_slot()
275 				WARN_ON(test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags));  in do_release_stripe()
871 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1567 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1798 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor5()  local
1802 	unsigned int off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_prexor5()
1803 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor5()
1931 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
1948 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
1982 	int count, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
1995 		if (pd_idx == i)  in ops_run_reconstruct5()
2002 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);  in ops_run_reconstruct5()
2015 		off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2016 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2026 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2027 		off_dest = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2030 			if (i != pd_idx) {  in ops_run_reconstruct5()
2088 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
2095 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in ops_run_reconstruct6()
2150 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
2166 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
2167 	off_dest = sh->dev[pd_idx].offset;  in ops_run_check_p()
2171 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2770 			if (sh->qd_idx >= 0 && sh->pd_idx == i)  in raid5_end_read_request()
2919 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
2947 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
2950 		pd_idx = data_disks;  in raid5_compute_sector()
2955 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2956 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2960 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2961 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2965 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2966 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2969 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2970 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2973 			pd_idx = 0;  in raid5_compute_sector()
2977 			pd_idx = data_disks;  in raid5_compute_sector()
2987 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2988 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2989 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2992 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2996 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2997 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2998 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3001 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3005 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3006 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3007 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3010 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3011 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3012 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3016 			pd_idx = 0;  in raid5_compute_sector()
3021 			pd_idx = data_disks;  in raid5_compute_sector()
3029 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3030 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3031 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3034 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3045 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3046 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3047 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3050 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3057 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3058 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
3059 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3065 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3066 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3072 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3073 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3079 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3080 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3085 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3086 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3091 			pd_idx = 0;  in raid5_compute_sector()
3103 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
3134 	if (i == sh->pd_idx)  in raid5_compute_blocknr()
3142 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3147 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3149 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3168 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3170 			else if (i > sh->pd_idx)  in raid5_compute_blocknr()
3175 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3179 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3181 				i -= (sh->pd_idx + 2);  in raid5_compute_blocknr()
3191 			if (sh->pd_idx == 0)  in raid5_compute_blocknr()
3195 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3197 				i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3202 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3207 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3209 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3225 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in raid5_compute_blocknr()
3294 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3340 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
3341 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
3348 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
3375 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3376 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3391 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))  in schedule_reconstruction()
3449 			if (i != sh->pd_idx &&  in add_stripe_bio()
3669 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_failed_sync()
3795 		     s->failed_num[i] == sh->pd_idx ||  in need_this_block()
3817 		if (s->failed_num[i] != sh->pd_idx &&  in need_this_block()
3857 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||  in fetch_block()
4019 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_clean_event()
4021 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4022 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4104 		     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4116 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4140 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_dirtying()
4169 			     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4194 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4254 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4263 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
4315 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4316 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
4336 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
4376 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
4415 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
4485 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
4486 					*target = pd_idx;  in handle_parity_checks6()
4520 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
4552 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
4926 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
4991 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&  in handle_stripe()
4992 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
4999 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
5009 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
5022 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
5023 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
5024 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
5137 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_stripe()
5710 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5716 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5719 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5733 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
6110 			if (j == sh->pd_idx)  in reshape_request()