bcache: set pdev_set_uuid before scond loop iteration

There is no need to reassign pdev_set_uuid in the second loop iteration,
so move it to the place before second loop.
Signed-off-by: NYi Li <yili@winhong.com>
Signed-off-by: NColy Li <colyli@suse.de>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/md/bcache/super.c

@@ -2644,8 +2644,8 @@ static ssize_t bch_pending_bdevs_cleanup(struct kobject *k,
 	}
 
 	list_for_each_entry_safe(pdev, tpdev, &pending_devs, list) {
+		char *pdev_set_uuid = pdev->dc->sb.set_uuid;
 		list_for_each_entry_safe(c, tc, &bch_cache_sets, list) {
-			char *pdev_set_uuid = pdev->dc->sb.set_uuid;
 			char *set_uuid = c->set_uuid;
 
 			if (!memcmp(pdev_set_uuid, set_uuid, 16)) {