[PATCH v2] dibs: change dibs_class to a const struct

[PATCH v2] dibs: change dibs_class to a const struct

[Jori Koolstra]

The class_create() call has been deprecated in favor of class_register()
as the driver core now allows for a struct class to be in read-only
memory. Change dibs_class to be a const struct class and drop the
class_create() call.

Link: https://lore.kernel.org/all/2023040244-duffel-pushpin-f738@gregkh/

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jori Koolstra <jkoolstra@xs4all.nl>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
---
 drivers/dibs/dibs_main.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/dibs/dibs_main.c b/drivers/dibs/dibs_main.c
index f1816361b74d..14c3e2d84902 100644
--- a/drivers/dibs/dibs_main.c
+++ b/drivers/dibs/dibs_main.c
@@ -19,7 +19,9 @@
 MODULE_DESCRIPTION("Direct Internal Buffer Sharing class");
 MODULE_LICENSE("GPL");
 
-static struct class *dibs_class;
+static const struct class dibs_class = {
+	.name		= "dibs",
+};
 
 /* use an array rather a list for fast mapping: */
 static struct dibs_client *clients[MAX_DIBS_CLIENTS];
@@ -137,7 +139,7 @@ struct dibs_dev *dibs_dev_alloc(void)
 	if (!dibs)
 		return dibs;
 	dibs->dev.release = dibs_dev_release;
-	dibs->dev.class = dibs_class;
+	dibs->dev.class = &dibs_class;
 	device_initialize(&dibs->dev);
 
 	return dibs;
@@ -253,9 +255,9 @@ static int __init dibs_init(void)
 {
 	int rc;
 
-	dibs_class = class_create("dibs");
-	if (IS_ERR(dibs_class))
-		return PTR_ERR(dibs_class);
+	rc = class_register(&dibs_class);
+	if (rc)
+		return rc;
 
 	rc = dibs_loopback_init();
 	if (rc)
@@ -267,7 +269,7 @@ static int __init dibs_init(void)
 static void __exit dibs_exit(void)
 {
 	dibs_loopback_exit();
-	class_destroy(dibs_class);
+	class_unregister(&dibs_class);
 }
 
 subsys_initcall(dibs_init);

base-commit: d466c332e106fe666d1e2f5a24d08e308bebbfa1
-- 
2.53.0

Re: [PATCH v2] dibs: change dibs_class to a const struct

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Tue,  3 Mar 2026 17:31:04 +0100 you wrote:
> The class_create() call has been deprecated in favor of class_register()
> as the driver core now allows for a struct class to be in read-only
> memory. Change dibs_class to be a const struct class and drop the
> class_create() call.
> 
> Link: https://lore.kernel.org/all/2023040244-duffel-pushpin-f738@gregkh/
> 
> [...]

Here is the summary with links:
  - [v2] dibs: change dibs_class to a const struct
    https://git.kernel.org/netdev/net-next/c/ad3dfa80be76

You are awesome, thank you!
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