464 		rdev = conf->mirrors[dev].replacement;  in raid10_end_write_request()
475 			/* Never record new bad blocks to replacement,  in raid10_end_write_request()
772 		rdev = rcu_dereference(conf->mirrors[disk].replacement);  in read_balance()
777 			 * Read replacement first to prevent reading both rdev  in read_balance()
778 			 * and replacement as NULL during replacement replace  in read_balance()
1267 				  struct bio *bio, bool replacement,  in raid10_write_one_disk()  argument
1279 	if (replacement) {  in raid10_write_one_disk()
1280 		rdev = conf->mirrors[devnum].replacement;  in raid10_write_one_disk()
1282 			/* Replacement just got moved to main 'rdev' */  in raid10_write_one_disk()
1290 	if (replacement)  in raid10_write_one_disk()
1299 	if (!replacement && test_bit(FailFast,  in raid10_write_one_disk()
1326 	rrdev = rcu_dereference(mirror->replacement);  in dereference_rdev_and_rrdev()
1328 	 * Read replacement first to prevent reading both rdev and  in dereference_rdev_and_rrdev()
1329 	 * replacement as NULL during replacement replace rdev.  in dereference_rdev_and_rrdev()
1618 		rdev = conf->mirrors[dev].replacement;  in raid10_end_discard_request()
1622 		 * replacement before setting replacement to NULL. It can read  in raid10_end_discard_request()
1623 		 * rdev first without barrier protect even replacement is NULL  in raid10_end_discard_request()
1856 			struct md_rdev *rrdev = conf->mirrors[disk].replacement;  in raid10_handle_discard()
2099 		if (tmp->replacement  in raid10_spare_active()
2100 		    && tmp->replacement->recovery_offset == MaxSector  in raid10_spare_active()
2101 		    && !test_bit(Faulty, &tmp->replacement->flags)  in raid10_spare_active()
2102 		    && !test_and_set_bit(In_sync, &tmp->replacement->flags)) {  in raid10_spare_active()
2103 			/* Replacement has just become active */  in raid10_spare_active()
2116 			sysfs_notify_dirent_safe(tmp->replacement->sysfs_state);  in raid10_spare_active()
2168 			    p->replacement == NULL && repl_slot < 0)  in raid10_add_disk()
2190 		set_bit(Replacement, &rdev->flags);  in raid10_add_disk()
2197 		rcu_assign_pointer(p->replacement, rdev);  in raid10_add_disk()
2218 	else if (rdev == p->replacement)  in raid10_remove_disk()
2219 		rdevp = &p->replacement;  in raid10_remove_disk()
2233 	    (!p->replacement || p->replacement == rdev) &&  in raid10_remove_disk()
2249 	if (p->replacement) {  in raid10_remove_disk()
2251 		p->rdev = p->replacement;  in raid10_remove_disk()
2252 		clear_bit(Replacement, &p->replacement->flags);  in raid10_remove_disk()
2256 		p->replacement = NULL;  in raid10_remove_disk()
2352 		rdev = conf->mirrors[d].replacement;  in end_sync_write()
2488 	/* Now write out to any replacement devices  in sync_request_write()
2502 		md_sync_acct(conf->mirrors[d].replacement->bdev,  in sync_request_write()
2641 		atomic_inc(&conf->mirrors[d].replacement->nr_pending);  in recovery_request_write()
2642 		md_sync_acct(conf->mirrors[d].replacement->bdev,  in recovery_request_write()
3023 			rdev = conf->mirrors[dev].replacement;  in handle_write_completed()
3061 			rdev = conf->mirrors[dev].replacement;  in handle_write_completed()
3170 		if (conf->mirrors[i].replacement)  in init_resync()
3358 						rcu_dereference(conf->mirrors[i].replacement);  in raid10_sync_request()
3445 			mreplace = rcu_dereference(mirror->replacement);  in raid10_sync_request()
3469 			/* Unless we are doing a full sync, or a replacement  in raid10_sync_request()
3588 				/* and maybe write to replacement */  in raid10_sync_request()
3766 			rdev = rcu_dereference(conf->mirrors[d].replacement);  in raid10_sync_request()
3773 			/* Need to set up for writing to the replacement */  in raid10_sync_request()
3799 						conf->mirrors[d].replacement,  in raid10_sync_request()
4187 		if (test_bit(Replacement, &rdev->flags)) {  in raid10_run()
4188 			if (disk->replacement)  in raid10_run()
4190 			disk->replacement = rdev;  in raid10_run()
4237 		if (!disk->rdev && disk->replacement) {  in raid10_run()
4238 			/* The replacement is all we have - use it */  in raid10_run()
4239 			disk->rdev = disk->replacement;  in raid10_run()
4240 			disk->replacement = NULL;  in raid10_run()
4241 			clear_bit(Replacement, &disk->rdev->flags);  in raid10_run()
4253 		if (disk->replacement &&  in raid10_run()
4254 		    !test_bit(In_sync, &disk->replacement->flags) &&  in raid10_run()
4255 		    disk->replacement->saved_raid_disk < 0) {  in raid10_run()
4971 			rdev2 = rcu_dereference(conf->mirrors[d].replacement);  in reshape_request()
5063 			rdev = rcu_dereference(conf->mirrors[d].replacement);  in reshape_request_write()
5201 		rdev = conf->mirrors[d].replacement;  in end_reshape_write()
5247 			rdev = rcu_dereference(conf->mirrors[d].replacement);  in raid10_finish_reshape()