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isdn: mISDN: make elements_class constant

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Since commit 43a7206b09 ("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 elements_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>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240305-class_cleanup-isdn-v1-1-6f0edca75b61@marliere.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ricardo B. Marliere 2024-03-05 17:04:47 -03:00 committed by Jakub Kicinski
parent b72413211b
commit 479b4bc867
1 changed files with 10 additions and 6 deletions
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16
drivers/isdn/mISDN/dsp_pipeline.c
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@ -31,7 +31,9 @@ struct dsp_element_entry {
static LIST_HEAD(dsp_elements);
/* sysfs */
static struct class *elements_class;
static const struct class elements_class = {
.name = "dsp_pipeline",
};
static ssize_t
attr_show_args(struct device *dev, struct device_attribute *attr, char *buf)
@ -80,7 +82,7 @@ int mISDN_dsp_element_register(struct mISDN_dsp_element *elem)
INIT_LIST_HEAD(&entry->list);
entry->elem = elem;
entry->dev.class = elements_class;
entry->dev.class = &elements_class;
entry->dev.release = mISDN_dsp_dev_release;
dev_set_drvdata(&entry->dev, elem);
dev_set_name(&entry->dev, "%s", elem->name);
@ -131,9 +133,11 @@ EXPORT_SYMBOL(mISDN_dsp_element_unregister);
int dsp_pipeline_module_init(void)
{
elements_class = class_create("dsp_pipeline");
if (IS_ERR(elements_class))
return PTR_ERR(elements_class);
int err;
err = class_register(&elements_class);
if (err)
return err;
dsp_hwec_init();
@ -146,7 +150,7 @@ void dsp_pipeline_module_exit(void)
dsp_hwec_exit();
class_destroy(elements_class);
class_unregister(&elements_class);
list_for_each_entry_safe(entry, n, &dsp_elements, list) {
list_del(&entry->list);