linux-kernel - [PATCH 2/6] blk-wbt: introduce wbt

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Date:   Thu, 23 Sep 2021 21:46:27 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <axboe@...nel.dk>, <tj@...nel.org>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <cgroups@...r.kernel.org>, <yukuai3@...wei.com>,
        <yi.zhang@...wei.com>
Subject: [PATCH 2/6] blk-wbt: introduce wbt_free()

Prepare to split 'kfree(rwb)' from wbt_exit(), no functional changes.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 block/blk-wbt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 874c1c37bf0c..4190453d5e0b 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -694,6 +694,13 @@ static void wbt_exit(struct rq_qos *rqos)
 	kfree(rwb);
 }
 
+static void wbt_free(struct rq_qos *rqos)
+{
+	struct rq_wb *rwb = RQWB(rqos);
+
+	kfree(rwb);
+}
+
 /*
  * Disable wbt, if enabled by default.
  */
@@ -808,6 +815,7 @@ static struct rq_qos_ops wbt_rqos_ops = {
 	.cleanup = wbt_cleanup,
 	.queue_depth_changed = wbt_queue_depth_changed,
 	.exit = wbt_exit,
+	.free = wbt_free,
 #ifdef CONFIG_BLK_DEBUG_FS
 	.debugfs_attrs = wbt_debugfs_attrs,
 #endif
-- 
2.31.1