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()
870 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1566 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1797 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor5()  local
1801 	unsigned int off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_prexor5()
1802 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor5()
1930 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
1947 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
1981 	int count, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
1994 		if (pd_idx == i)  in ops_run_reconstruct5()
2001 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);  in ops_run_reconstruct5()
2014 		off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2015 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2025 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2026 		off_dest = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2029 			if (i != pd_idx) {  in ops_run_reconstruct5()
2087 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
2094 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in ops_run_reconstruct6()
2149 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
2165 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
2166 	off_dest = sh->dev[pd_idx].offset;  in ops_run_check_p()
2170 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2769 			if (sh->qd_idx >= 0 && sh->pd_idx == i)  in raid5_end_read_request()
2921 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
2949 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
2952 		pd_idx = data_disks;  in raid5_compute_sector()
2957 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2958 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2962 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2963 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2967 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2968 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2971 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2972 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
2975 			pd_idx = 0;  in raid5_compute_sector()
2979 			pd_idx = data_disks;  in raid5_compute_sector()
2989 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2990 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
2991 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
2994 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2998 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2999 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3000 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3003 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3007 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3008 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3009 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3012 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3013 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3014 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3018 			pd_idx = 0;  in raid5_compute_sector()
3023 			pd_idx = data_disks;  in raid5_compute_sector()
3031 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3032 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3033 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3036 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3047 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3048 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3049 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3052 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3059 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3060 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
3061 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3067 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3068 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3074 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3075 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3081 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3082 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3087 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3088 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3093 			pd_idx = 0;  in raid5_compute_sector()
3105 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
3136 	if (i == sh->pd_idx)  in raid5_compute_blocknr()
3144 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3149 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3151 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3170 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3172 			else if (i > sh->pd_idx)  in raid5_compute_blocknr()
3177 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3181 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3183 				i -= (sh->pd_idx + 2);  in raid5_compute_blocknr()
3193 			if (sh->pd_idx == 0)  in raid5_compute_blocknr()
3197 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3199 				i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3204 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3209 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3211 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3227 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in raid5_compute_blocknr()
3296 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3342 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
3343 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
3350 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
3377 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3378 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3393 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))  in schedule_reconstruction()
3451 			if (i != sh->pd_idx &&  in add_stripe_bio()
3671 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_failed_sync()
3797 		     s->failed_num[i] == sh->pd_idx ||  in need_this_block()
3819 		if (s->failed_num[i] != sh->pd_idx &&  in need_this_block()
3859 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||  in fetch_block()
4021 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_clean_event()
4023 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4024 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4106 		     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4118 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4142 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_dirtying()
4171 			     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4196 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4256 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4265 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
4317 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4318 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
4338 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
4378 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
4417 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
4487 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
4488 					*target = pd_idx;  in handle_parity_checks6()
4522 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
4554 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
4928 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
4993 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&  in handle_stripe()
4994 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
5001 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
5011 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
5024 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
5025 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
5026 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
5139 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_stripe()
5712 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5718 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5721 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5735 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
6112 			if (j == sh->pd_idx)  in reshape_request()