linux-kernel - [PATCH] workqueue: make wq

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Message-Id: <20240204-bus_cleanup-workqueue-v1-1-311748f9101a@marliere.net>
Date: Sun, 04 Feb 2024 10:47:05 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Tejun Heo <tj@...nel.org>, Lai Jiangshan <jiangshanlai@...il.com>
Cc: linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] 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.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 kernel/workqueue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ffb625db9771..09caa1a34630 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -6686,7 +6686,7 @@ 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,
 };

---
base-commit: d49e20ca05ef22580bd4ae3219a31e4630f8df97
change-id: 20240204-bus_cleanup-workqueue-b5544924b8b9

Best regards,
-- 
Ricardo B. Marliere <ricardo@...liere.net>