linux-kernel - [PATCH 08/36] workqueue: move to use bus_get_dev

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Date:   Mon, 13 Mar 2023 19:28:50 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     rafael@...nel.org, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: [PATCH 08/36] workqueue: move to use bus_get_dev_root()

Direct access to the struct bus_type dev_root pointer is going away soon
so replace that with a call to bus_get_dev_root() instead, which is what
it is there for.

Cc: Tejun Heo <tj@...nel.org>
Cc: Lai Jiangshan <jiangshanlai@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
Note, this is a patch that is a prepatory cleanup as part of a larger
series of patches that is working on resolving some old driver core
design mistakes.  It will build and apply cleanly on top of 6.3-rc2 on
its own, but I'd prefer if I could take it through my driver-core tree
so that the driver core changes can be taken through there for 6.4-rc1.

 kernel/workqueue.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index b8b541caed48..209917792fa4 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -5826,13 +5826,19 @@ static struct device_attribute wq_sysfs_cpumask_attr =
 
 static int __init wq_sysfs_init(void)
 {
+	struct device *dev_root;
 	int err;
 
 	err = subsys_virtual_register(&wq_subsys, NULL);
 	if (err)
 		return err;
 
-	return device_create_file(wq_subsys.dev_root, &wq_sysfs_cpumask_attr);
+	dev_root = bus_get_dev_root(&wq_subsys);
+	if (dev_root) {
+		err = device_create_file(dev_root, &wq_sysfs_cpumask_attr);
+		put_device(dev_root);
+	}
+	return err;
 }
 core_initcall(wq_sysfs_init);
 
-- 
2.39.2