linux-kernel - [PATCH 09/10] block, bfq: remove unused bfq_wr_max_time in struct bfq

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Message-ID: <20221108045224.19092-10-shikemeng@huawei.com>
Date:   Tue, 8 Nov 2022 12:52:23 +0800
From:   Kemeng Shi <shikemeng@...wei.com>
To:     <paolo.valente@...aro.org>, <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <shikemeng@...wei.com>
Subject: [PATCH 09/10] block, bfq: remove unused bfq_wr_max_time in struct bfq_data

bfqd->bfq_wr_max_time is set to 0 in bfq_init_queue and is never changed.
It is only used in bfq_wr_duration when bfq_wr_max_time > 0 which never
meets, so bfqd->bfq_wr_max_time is not used actually. Just remove it.

Signed-off-by: Kemeng Shi <shikemeng@...wei.com>
---
 block/bfq-iosched.c | 4 ----
 block/bfq-iosched.h | 2 --
 2 files changed, 6 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 64c1249d8eda..40ac219b2d8f 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1120,9 +1120,6 @@ static unsigned int bfq_wr_duration(struct bfq_data *bfqd)
 {
 	u64 dur;
 
-	if (bfqd->bfq_wr_max_time > 0)
-		return bfqd->bfq_wr_max_time;
-
 	dur = bfqd->rate_dur_prod;
 	do_div(dur, bfqd->peak_rate);
 
@@ -7138,7 +7135,6 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_type *e)
 	 */
 	bfqd->bfq_wr_coeff = 30;
 	bfqd->bfq_wr_rt_max_time = msecs_to_jiffies(300);
-	bfqd->bfq_wr_max_time = 0;
 	bfqd->bfq_wr_min_idle_time = msecs_to_jiffies(2000);
 	bfqd->bfq_wr_min_inter_arr_async = msecs_to_jiffies(500);
 	bfqd->bfq_wr_max_softrt_rate = 7000; /*
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index 71f721670ab6..48c147e5f9e0 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -719,8 +719,6 @@ struct bfq_data {
 	 * is multiplied.
 	 */
 	unsigned int bfq_wr_coeff;
-	/* maximum duration of a weight-raising period (jiffies) */
-	unsigned int bfq_wr_max_time;
 
 	/* Maximum weight-raising duration for soft real-time processes */
 	unsigned int bfq_wr_rt_max_time;
-- 
2.30.0