148 	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()
952 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1645 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1876 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor5()  local
1880 	unsigned int off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_prexor5()
1881 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor5()
2009 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
2026 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
2060 	int count, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
2073 		if (pd_idx == i)  in ops_run_reconstruct5()
2080 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);  in ops_run_reconstruct5()
2093 		off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2094 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2104 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2105 		off_dest = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2108 			if (i != pd_idx) {  in ops_run_reconstruct5()
2166 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
2173 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in ops_run_reconstruct6()
2228 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
2244 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
2245 	off_dest = sh->dev[pd_idx].offset;  in ops_run_check_p()
2249 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2860 			if (sh->qd_idx >= 0 && sh->pd_idx == i)  in raid5_end_read_request()
3007 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
3035 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
3038 		pd_idx = data_disks;  in raid5_compute_sector()
3043 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3044 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3048 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3049 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3053 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3054 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3057 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3058 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3061 			pd_idx = 0;  in raid5_compute_sector()
3065 			pd_idx = data_disks;  in raid5_compute_sector()
3075 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3076 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3077 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3080 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3084 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3085 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3086 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3089 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3093 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3094 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3095 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3098 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3099 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3100 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3104 			pd_idx = 0;  in raid5_compute_sector()
3109 			pd_idx = data_disks;  in raid5_compute_sector()
3117 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3118 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3119 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3122 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3133 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3134 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3135 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3138 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3145 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3146 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
3147 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3153 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3154 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3160 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3161 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3167 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3168 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3173 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3174 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3179 			pd_idx = 0;  in raid5_compute_sector()
3191 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
3222 	if (i == sh->pd_idx)  in raid5_compute_blocknr()
3230 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3235 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3237 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3256 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3258 			else if (i > sh->pd_idx)  in raid5_compute_blocknr()
3263 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3267 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3269 				i -= (sh->pd_idx + 2);  in raid5_compute_blocknr()
3279 			if (sh->pd_idx == 0)  in raid5_compute_blocknr()
3283 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3285 				i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3290 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3295 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3297 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3313 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in raid5_compute_blocknr()
3382 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3428 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
3429 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
3436 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
3463 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3464 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3479 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))  in schedule_reconstruction()
3529 			if (i != sh->pd_idx &&  in stripe_bio_overlaps()
3781 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_failed_sync()
3907 		     s->failed_num[i] == sh->pd_idx ||  in need_this_block()
3929 		if (s->failed_num[i] != sh->pd_idx &&  in need_this_block()
3969 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||  in fetch_block()
4131 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_clean_event()
4133 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4134 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4216 		     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4228 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4252 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_dirtying()
4281 			     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4306 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4366 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4375 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
4427 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4428 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
4448 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
4488 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
4527 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
4597 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
4598 					*target = pd_idx;  in handle_parity_checks6()
4632 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
4665 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
5039 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
5104 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&  in handle_stripe()
5105 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
5112 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
5122 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
5135 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
5136 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
5137 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
5250 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_stripe()
5819 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5825 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5828 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5842 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5895 		if (dd_idx == sh->pd_idx)  in stripe_ahead_of_reshape()
5926 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in add_all_stripe_bios()
5946 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in add_all_stripe_bios()
6124 	while (dd_idx == sh.pd_idx || dd_idx == sh.qd_idx)  in raid5_bio_lowest_chunk_sector()
6433 			if (j == sh->pd_idx)  in reshape_request()