raid5: remove unused variables

The two variables are useless.
Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>

drivers/md/raid5.c

@@ -3985,12 +3985,10 @@ static void make_request(struct mddev *mddev, struct bio * bi)
 	plugged = mddev_check_plugged(mddev);
 	for (;logical_sector < last_sector; logical_sector += STRIPE_SECTORS) {
 		DEFINE_WAIT(w);
-		int disks, data_disks;
 		int previous;
 
 	retry:
 		previous = 0;
-		disks = conf->raid_disks;
 		prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
 		if (unlikely(conf->reshape_progress != MaxSector)) {
 			/* spinlock is needed as reshape_progress may be
@@ -4005,7 +4003,6 @@ static void make_request(struct mddev *mddev, struct bio * bi)
 			if (mddev->reshape_backwards
 			    ? logical_sector < conf->reshape_progress
 			    : logical_sector >= conf->reshape_progress) {
-				disks = conf->previous_raid_disks;
 				previous = 1;
 			} else {
 				if (mddev->reshape_backwards
@@ -4018,7 +4015,6 @@ static void make_request(struct mddev *mddev, struct bio * bi)
 			}
 			spin_unlock_irq(&conf->device_lock);
 		}
-		data_disks = disks - conf->max_degraded;
 
 		new_sector = raid5_compute_sector(conf, logical_sector,
 						  previous,