blk-throttle: remove last_bytes_disp and last_ios_disp

The two fields are not used any more, so remove them.

Cc: Tejun Heo <[email protected]>
Cc: Josef Bacik <[email protected]>
Cc: Yu Kuai <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Acked-by: Tejun Heo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: Ming Lei

block/blk-throttle.c

@@ -819,13 +819,10 @@ static void throtl_charge_bio(struct throtl_grp *tg, struct bio *bio)
 	unsigned int bio_size = throtl_bio_data_size(bio);
 
 	/* Charge the bio to the group */
-	if (!bio_flagged(bio, BIO_BPS_THROTTLED)) {
+	if (!bio_flagged(bio, BIO_BPS_THROTTLED))
 		tg->bytes_disp[rw] += bio_size;
-		tg->last_bytes_disp[rw] += bio_size;
-	}
 
 	tg->io_disp[rw]++;
-	tg->last_io_disp[rw]++;
 }
 
 /**

block/blk-throttle.h

@@ -106,9 +106,6 @@ struct throtl_grp {
 	/* Number of bio's dispatched in current slice */
 	unsigned int io_disp[2];
 
-	uint64_t last_bytes_disp[2];
-	unsigned int last_io_disp[2];
-
 	/*
 	 * The following two fields are updated when new configuration is
 	 * submitted while some bios are still throttled, they record how many