153 	if (idx == sh->pd_idx)  in raid6_idx_to_slot()
288 				WARN_ON(test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags));  in do_release_stripe()
955 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_add_to_batch_list()
1623 		if (i == sh->qd_idx || i == sh->pd_idx ||  in set_syndrome_sources()
1854 	int count = 0, pd_idx = sh->pd_idx, i;  in ops_run_prexor5()  local
1858 	unsigned int off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_prexor5()
1859 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_prexor5()
1987 	int pd_idx = sh->pd_idx;  in ops_complete_reconstruct()  local
2004 		if (dev->written || i == pd_idx || i == qd_idx) {  in ops_complete_reconstruct()
2038 	int count, pd_idx = sh->pd_idx, i;  in ops_run_reconstruct5()  local
2051 		if (pd_idx == i)  in ops_run_reconstruct5()
2058 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);  in ops_run_reconstruct5()
2071 		off_dest = off_srcs[count] = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2072 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2082 		xor_dest = sh->dev[pd_idx].page;  in ops_run_reconstruct5()
2083 		off_dest = sh->dev[pd_idx].offset;  in ops_run_reconstruct5()
2086 			if (i != pd_idx) {  in ops_run_reconstruct5()
2144 		if (sh->pd_idx == i || sh->qd_idx == i)  in ops_run_reconstruct6()
2151 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in ops_run_reconstruct6()
2206 	int pd_idx = sh->pd_idx;  in ops_run_check_p()  local
2222 	xor_dest = sh->dev[pd_idx].page;  in ops_run_check_p()
2223 	off_dest = sh->dev[pd_idx].offset;  in ops_run_check_p()
2227 		if (i == pd_idx || i == qd_idx)  in ops_run_check_p()
2814 			if (sh->qd_idx >= 0 && sh->pd_idx == i)  in raid5_end_read_request()
2953 	int pd_idx, qd_idx;  in raid5_compute_sector()  local
2981 	pd_idx = qd_idx = -1;  in raid5_compute_sector()
2984 		pd_idx = data_disks;  in raid5_compute_sector()
2989 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2990 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2994 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
2995 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
2999 			pd_idx = data_disks - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3000 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3003 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3004 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3007 			pd_idx = 0;  in raid5_compute_sector()
3011 			pd_idx = data_disks;  in raid5_compute_sector()
3021 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3022 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3023 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3026 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3030 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3031 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3032 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3035 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3039 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3040 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3041 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3044 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3045 			qd_idx = (pd_idx + 1) % raid_disks;  in raid5_compute_sector()
3046 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3050 			pd_idx = 0;  in raid5_compute_sector()
3055 			pd_idx = data_disks;  in raid5_compute_sector()
3063 			pd_idx = sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3064 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3065 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3068 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3079 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3080 			qd_idx = pd_idx + 1;  in raid5_compute_sector()
3081 			if (pd_idx == raid_disks-1) {  in raid5_compute_sector()
3084 			} else if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3091 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);  in raid5_compute_sector()
3092 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;  in raid5_compute_sector()
3093 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;  in raid5_compute_sector()
3099 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3100 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3106 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3107 			if (*dd_idx >= pd_idx)  in raid5_compute_sector()
3113 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3114 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3119 			pd_idx = sector_div(stripe2, raid_disks-1);  in raid5_compute_sector()
3120 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);  in raid5_compute_sector()
3125 			pd_idx = 0;  in raid5_compute_sector()
3137 		sh->pd_idx = pd_idx;  in raid5_compute_sector()
3168 	if (i == sh->pd_idx)  in raid5_compute_blocknr()
3176 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3181 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3183 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3202 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3204 			else if (i > sh->pd_idx)  in raid5_compute_blocknr()
3209 			if (sh->pd_idx == raid_disks-1)  in raid5_compute_blocknr()
3213 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3215 				i -= (sh->pd_idx + 2);  in raid5_compute_blocknr()
3225 			if (sh->pd_idx == 0)  in raid5_compute_blocknr()
3229 				if (i < sh->pd_idx)  in raid5_compute_blocknr()
3231 				i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3236 			if (i > sh->pd_idx)  in raid5_compute_blocknr()
3241 			if (i < sh->pd_idx)  in raid5_compute_blocknr()
3243 			i -= (sh->pd_idx + 1);  in raid5_compute_blocknr()
3259 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx  in raid5_compute_blocknr()
3328 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3374 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||  in schedule_reconstruction()
3375 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));  in schedule_reconstruction()
3382 			if (i == pd_idx || i == qd_idx)  in schedule_reconstruction()
3409 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3410 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in schedule_reconstruction()
3425 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))  in schedule_reconstruction()
3475 			if (i != sh->pd_idx &&  in stripe_bio_overlaps()
3693 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_failed_sync()
3694 		wake_up_bit(&sh->dev[sh->pd_idx].flags, R5_Overlap);  in handle_failed_sync()
3822 		     s->failed_num[i] == sh->pd_idx ||  in need_this_block()
3844 		if (s->failed_num[i] != sh->pd_idx &&  in need_this_block()
3884 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||  in fetch_block()
4045 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_clean_event()
4047 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4048 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_stripe_clean_event()
4137 		     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4149 		    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4172 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {  in handle_stripe_dirtying()
4201 			     i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe_dirtying()
4226 			    i != sh->pd_idx && i != sh->qd_idx &&  in handle_stripe_dirtying()
4287 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4296 			dev = &sh->dev[sh->pd_idx];  in handle_parity_checks5()
4347 					&sh->dev[sh->pd_idx].flags);  in handle_parity_checks5()
4348 				sh->ops.target = sh->pd_idx;  in handle_parity_checks5()
4368 	int pd_idx = sh->pd_idx;  in handle_parity_checks6()  local
4408 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);  in handle_parity_checks6()
4447 			dev = &sh->dev[pd_idx];  in handle_parity_checks6()
4516 						&sh->dev[pd_idx].flags);  in handle_parity_checks6()
4517 					*target = pd_idx;  in handle_parity_checks6()
4551 		if (i != sh->pd_idx && i != sh->qd_idx) {  in handle_stripe_expansion()
4584 				if (j != sh2->pd_idx &&  in handle_stripe_expansion()
4955 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,  in handle_stripe()
5021 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&  in handle_stripe()
5022 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));  in handle_stripe()
5029 				(i == sh->pd_idx || i == sh->qd_idx ||  in handle_stripe()
5039 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&  in handle_stripe()
5052 	pdev = &sh->dev[sh->pd_idx];  in handle_stripe()
5053 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)  in handle_stripe()
5054 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);  in handle_stripe()
5167 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))  in handle_stripe()
5168 			wake_up_bit(&sh->dev[sh->pd_idx].flags, R5_Overlap);  in handle_stripe()
5724 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5727 			wait_on_bit(&sh->dev[sh->pd_idx].flags, R5_Overlap,  in make_discard_request()
5731 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);  in make_discard_request()
5734 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5748 			if (d == sh->pd_idx || d == sh->qd_idx)  in make_discard_request()
5794 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in stripe_ahead_of_reshape()
5824 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in add_all_stripe_bios()
5849 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)  in add_all_stripe_bios()
6077 	while (dd_idx == sh.pd_idx || dd_idx == sh.qd_idx)  in raid5_bio_lowest_chunk_sector()
6413 			if (j == sh->pd_idx)  in reshape_request()