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: Lai Jiangshan <jiangshanlai@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230313182918.1312597-8-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index b8b541c..2099177 100644 (file)
--- 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);