workqueue: make wq_subsys const

Now that the driver core can properly handle constant struct bus_type,
move the wq_subsys variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: "Ricardo B. Marliere" <ricardo@marliere.net>
Cc: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20240206-bus_cleanup-workqueue-v1-1-72b10d282d58@marliere.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 76e60faed892357002868cdf9fb41c76ad4eba54..f1e062acd0916fae248ff3eee388f0f19fe68699 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -6157,7 +6157,7 @@ static struct device_attribute wq_sysfs_unbound_attrs[] = {
        __ATTR_NULL,
 };
 
-static struct bus_type wq_subsys = {
+static const struct bus_type wq_subsys = {
        .name                           = "workqueue",
        .dev_groups                     = wq_sysfs_groups,
 };