[PATCH] md: Remove dependancy on MD_SB_DISKS from raid5

One embeded array gets moved to end of structure and
sized dynamically.

drivers/md/raid5.c

@@ -1452,7 +1452,9 @@ static int run (mddev_t *mddev)
 		return -EIO;
 	}
 
-	mddev->private = kmalloc (sizeof (raid5_conf_t), GFP_KERNEL);
+	mddev->private = kmalloc (sizeof (raid5_conf_t)
+				  + mddev->raid_disks * sizeof(struct disk_info),
+				  GFP_KERNEL);
 	if ((conf = mddev->private) == NULL)
 		goto abort;
 	memset (conf, 0, sizeof (*conf));

include/linux/raid/raid5.h

@@ -202,7 +202,6 @@ struct disk_info {
 struct raid5_private_data {
 	struct stripe_head	**stripe_hashtbl;
 	mddev_t			*mddev;
-	struct disk_info	disks[MD_SB_DISKS];
 	struct disk_info	*spare;
 	int			chunk_size, level, algorithm;
 	int			raid_disks, working_disks, failed_disks;
@@ -224,6 +223,7 @@ struct raid5_private_data {
 							 * waiting for 25% to be free
 							 */        
 	spinlock_t		device_lock;
+	struct disk_info	disks[0];
 };
 
 typedef struct raid5_private_data raid5_conf_t;