469 		rdev = conf->mirrors[dev].replacement;  in raid10_end_write_request()
480 			/* Never record new bad blocks to replacement,  in raid10_end_write_request()
778 		rdev = rcu_dereference(conf->mirrors[disk].replacement);  in read_balance()
783 			 * Read replacement first to prevent reading both rdev  in read_balance()
784 			 * and replacement as NULL during replacement replace  in read_balance()
1270 				  struct bio *bio, bool replacement,  in raid10_write_one_disk()  argument
1282 	if (replacement) {  in raid10_write_one_disk()
1283 		rdev = conf->mirrors[devnum].replacement;  in raid10_write_one_disk()
1285 			/* Replacement just got moved to main 'rdev' */  in raid10_write_one_disk()
1293 	if (replacement)  in raid10_write_one_disk()
1302 	if (!replacement && test_bit(FailFast,  in raid10_write_one_disk()
1329 	rrdev = rcu_dereference(mirror->replacement);  in dereference_rdev_and_rrdev()
1331 	 * Read replacement first to prevent reading both rdev and  in dereference_rdev_and_rrdev()
1332 	 * replacement as NULL during replacement replace rdev.  in dereference_rdev_and_rrdev()
1629 		rdev = conf->mirrors[dev].replacement;  in raid10_end_discard_request()
1633 		 * replacement before setting replacement to NULL. It can read  in raid10_end_discard_request()
1634 		 * rdev first without barrier protect even replacement is NULL  in raid10_end_discard_request()
1866 			struct md_rdev *rrdev = conf->mirrors[disk].replacement;  in raid10_handle_discard()
2109 		if (tmp->replacement  in raid10_spare_active()
2110 		    && tmp->replacement->recovery_offset == MaxSector  in raid10_spare_active()
2111 		    && !test_bit(Faulty, &tmp->replacement->flags)  in raid10_spare_active()
2112 		    && !test_and_set_bit(In_sync, &tmp->replacement->flags)) {  in raid10_spare_active()
2113 			/* Replacement has just become active */  in raid10_spare_active()
2126 			sysfs_notify_dirent_safe(tmp->replacement->sysfs_state);  in raid10_spare_active()
2178 			    p->replacement == NULL && repl_slot < 0)  in raid10_add_disk()
2200 		set_bit(Replacement, &rdev->flags);  in raid10_add_disk()
2207 		rcu_assign_pointer(p->replacement, rdev);  in raid10_add_disk()
2228 	else if (rdev == p->replacement)  in raid10_remove_disk()
2229 		rdevp = &p->replacement;  in raid10_remove_disk()
2243 	    (!p->replacement || p->replacement == rdev) &&  in raid10_remove_disk()
2259 	if (p->replacement) {  in raid10_remove_disk()
2261 		p->rdev = p->replacement;  in raid10_remove_disk()
2262 		clear_bit(Replacement, &p->replacement->flags);  in raid10_remove_disk()
2266 		p->replacement = NULL;  in raid10_remove_disk()
2362 		rdev = conf->mirrors[d].replacement;  in end_sync_write()
2498 	/* Now write out to any replacement devices  in sync_request_write()
2512 		md_sync_acct(conf->mirrors[d].replacement->bdev,  in sync_request_write()
2651 		atomic_inc(&conf->mirrors[d].replacement->nr_pending);  in recovery_request_write()
2652 		md_sync_acct(conf->mirrors[d].replacement->bdev,  in recovery_request_write()
3033 			rdev = conf->mirrors[dev].replacement;  in handle_write_completed()
3074 			rdev = conf->mirrors[dev].replacement;  in handle_write_completed()
3185 		if (conf->mirrors[i].replacement)  in init_resync()
3373 						rcu_dereference(conf->mirrors[i].replacement);  in raid10_sync_request()
3460 			mreplace = rcu_dereference(mirror->replacement);  in raid10_sync_request()
3484 			/* Unless we are doing a full sync, or a replacement  in raid10_sync_request()
3603 				/* and maybe write to replacement */  in raid10_sync_request()
3781 			rdev = rcu_dereference(conf->mirrors[d].replacement);  in raid10_sync_request()
3788 			/* Need to set up for writing to the replacement */  in raid10_sync_request()
3814 						conf->mirrors[d].replacement,  in raid10_sync_request()
4202 		if (test_bit(Replacement, &rdev->flags)) {  in raid10_run()
4203 			if (disk->replacement)  in raid10_run()
4205 			disk->replacement = rdev;  in raid10_run()
4252 		if (!disk->rdev && disk->replacement) {  in raid10_run()
4253 			/* The replacement is all we have - use it */  in raid10_run()
4254 			disk->rdev = disk->replacement;  in raid10_run()
4255 			disk->replacement = NULL;  in raid10_run()
4256 			clear_bit(Replacement, &disk->rdev->flags);  in raid10_run()
4268 		if (disk->replacement &&  in raid10_run()
4269 		    !test_bit(In_sync, &disk->replacement->flags) &&  in raid10_run()
4270 		    disk->replacement->saved_raid_disk < 0) {  in raid10_run()
4986 			rdev2 = rcu_dereference(conf->mirrors[d].replacement);  in reshape_request()
5078 			rdev = rcu_dereference(conf->mirrors[d].replacement);  in reshape_request_write()
5216 		rdev = conf->mirrors[d].replacement;  in end_reshape_write()
5262 			rdev = rcu_dereference(conf->mirrors[d].replacement);  in raid10_finish_reshape()