blk-throttle: print signed value 'carryover_bytes/ios' for user

'carryover_bytes/ios' can be negative, indicate that some bio is
dispatched in advance within slice while configuration is updated.
Print a huge value is not user-friendly.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230816012708.1193747-2-yukuai1@huaweicloud.comSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-throttle.c

@@ -816,7 +816,7 @@ static void tg_update_carryover(struct throtl_grp *tg)
 		__tg_update_carryover(tg, WRITE);
 
 	/* see comments in struct throtl_grp for meaning of these fields. */
-	throtl_log(&tg->service_queue, "%s: %llu %llu %u %u\n", __func__,
+	throtl_log(&tg->service_queue, "%s: %lld %lld %d %d\n", __func__,
 		   tg->carryover_bytes[READ], tg->carryover_bytes[WRITE],
 		   tg->carryover_ios[READ], tg->carryover_ios[WRITE]);
 }

block/blk-throttle.h

@@ -127,8 +127,8 @@ struct throtl_grp {
 	 * bytes/ios are waited already in previous configuration, and they will
 	 * be used to calculate wait time under new configuration.
 	 */
-	uint64_t carryover_bytes[2];
-	unsigned int carryover_ios[2];
+	long long carryover_bytes[2];
+	int carryover_ios[2];
 
 	unsigned long last_check_time;