linux-kernel - [PATCH 6.1 54/71] blk-wbt: pass a gendisk to wbt

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Message-ID: <20240313163957.615276-55-sashal@kernel.org>
Date: Wed, 13 Mar 2024 12:39:40 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Christoph Hellwig <hch@....de>,
	Andreas Herrmann <aherrmann@...e.de>,
	Tejun Heo <tj@...nel.org>,
	Jens Axboe <axboe@...nel.dk>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.1 54/71] blk-wbt: pass a gendisk to wbt_init

From: Christoph Hellwig <hch@....de>

[ Upstream commit 958f29654747a54f2272eb478e493eb97f492e06 ]

Pass a gendisk to wbt_init to prepare for phasing out usage of the
request_queue in the blk-cgroup code.

Signed-off-by: Christoph Hellwig <hch@....de>
Reviewed-by: Andreas Herrmann <aherrmann@...e.de>
Acked-by: Tejun Heo <tj@...nel.org>
Link: https://lore.kernel.org/r/20230203150400.3199230-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Stable-dep-of: f814bdda774c ("blk-wbt: Fix detection of dirty-throttled tasks")
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 block/blk-sysfs.c | 2 +-
 block/blk-wbt.c   | 5 +++--
 block/blk-wbt.h   | 4 ++--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index c59c4d3ee7a27..31f53ef01982d 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -488,7 +488,7 @@ static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page,
 
 	rqos = wbt_rq_qos(q);
 	if (!rqos) {
-		ret = wbt_init(q);
+		ret = wbt_init(q->disk);
 		if (ret)
 			return ret;
 	}
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 8d4f075f13e2f..95bec9244e9f3 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -658,7 +658,7 @@ void wbt_enable_default(struct gendisk *disk)
 		return;
 
 	if (queue_is_mq(q) && !disable_flag)
-		wbt_init(q);
+		wbt_init(disk);
 }
 EXPORT_SYMBOL_GPL(wbt_enable_default);
 
@@ -822,8 +822,9 @@ static struct rq_qos_ops wbt_rqos_ops = {
 #endif
 };
 
-int wbt_init(struct request_queue *q)
+int wbt_init(struct gendisk *disk)
 {
+	struct request_queue *q = disk->queue;
 	struct rq_wb *rwb;
 	int i;
 	int ret;
diff --git a/block/blk-wbt.h b/block/blk-wbt.h
index 58c226fe33d48..8170439b89d6e 100644
--- a/block/blk-wbt.h
+++ b/block/blk-wbt.h
@@ -88,7 +88,7 @@ static inline unsigned int wbt_inflight(struct rq_wb *rwb)
 
 #ifdef CONFIG_BLK_WBT
 
-int wbt_init(struct request_queue *);
+int wbt_init(struct gendisk *disk);
 void wbt_disable_default(struct gendisk *disk);
 void wbt_enable_default(struct gendisk *disk);
 
@@ -101,7 +101,7 @@ u64 wbt_default_latency_nsec(struct request_queue *);
 
 #else
 
-static inline int wbt_init(struct request_queue *q)
+static inline int wbt_init(struct gendisk *disk)
 {
 	return -EINVAL;
 }
-- 
2.43.0