Patch "blk-wbt: pass a gendisk to wbt_init" has been added to the 6.1-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    blk-wbt: pass a gendisk to wbt_init

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     blk-wbt-pass-a-gendisk-to-wbt_init.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 64436d303bf9f3e4b615121498533f1e7b068e19
Author: Christoph Hellwig <hch@xxxxxx>
Date:   Fri Feb 3 16:03:50 2023 +0100

    blk-wbt: pass a gendisk to wbt_init
    
    [ 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@xxxxxx>
    Reviewed-by: Andreas Herrmann <aherrmann@xxxxxxx>
    Acked-by: Tejun Heo <tj@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/20230203150400.3199230-10-hch@xxxxxx
    Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
    Stable-dep-of: f814bdda774c ("blk-wbt: Fix detection of dirty-throttled tasks")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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;
 }