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net: wwan: hwsim: make wwan_hwsim_class constant

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Since commit 43a7206b0963 ("driver core: class: make class_register() take
a const *"), the driver core allows for struct class to be in read-only
memory, so move the wwan_hwsim_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
Acked-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Link: https://lore.kernel.org/r/20240302-class_cleanup-net-next-v1-4-8fa378595b93@marliere.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ricardo B. Marliere 2024-03-02 14:06:00 -03:00 committed by Jakub Kicinski
parent 2ad2018aa3
commit d9567f212b
1 changed files with 8 additions and 8 deletions
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16
drivers/net/wwan/wwan_hwsim.c
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@ -25,7 +25,9 @@ static int wwan_hwsim_devsnum = 2;
module_param_named(devices, wwan_hwsim_devsnum, int, 0444);
MODULE_PARM_DESC(devices, "Number of simulated devices");
static struct class *wwan_hwsim_class;
static const struct class wwan_hwsim_class = {
.name = "wwan_hwsim",
};
static struct dentry *wwan_hwsim_debugfs_topdir;
static struct dentry *wwan_hwsim_debugfs_devcreate;
@ -277,7 +279,7 @@ static struct wwan_hwsim_dev *wwan_hwsim_dev_new(void)
spin_unlock(&wwan_hwsim_devs_lock);
dev->dev.release = wwan_hwsim_dev_release;
dev->dev.class = wwan_hwsim_class;
dev->dev.class = &wwan_hwsim_class;
dev_set_name(&dev->dev, "hwsim%u", dev->id);
spin_lock_init(&dev->ports_lock);
@ -511,11 +513,9 @@ static int __init wwan_hwsim_init(void)
if (!wwan_wq)
return -ENOMEM;
wwan_hwsim_class = class_create("wwan_hwsim");
if (IS_ERR(wwan_hwsim_class)) {
err = PTR_ERR(wwan_hwsim_class);
err = class_register(&wwan_hwsim_class);
if (err)
goto err_wq_destroy;
}
wwan_hwsim_debugfs_topdir = debugfs_create_dir("wwan_hwsim", NULL);
wwan_hwsim_debugfs_devcreate =
@ -534,7 +534,7 @@ err_clean_devs:
wwan_hwsim_free_devs();
flush_workqueue(wwan_wq); /* Wait deletion works completion */
debugfs_remove(wwan_hwsim_debugfs_topdir);
class_destroy(wwan_hwsim_class);
class_unregister(&wwan_hwsim_class);
err_wq_destroy:
destroy_workqueue(wwan_wq);
@ -547,7 +547,7 @@ static void __exit wwan_hwsim_exit(void)
wwan_hwsim_free_devs();
flush_workqueue(wwan_wq); /* Wait deletion works completion */
debugfs_remove(wwan_hwsim_debugfs_topdir);
class_destroy(wwan_hwsim_class);
class_unregister(&wwan_hwsim_class);
destroy_workqueue(wwan_wq);
}