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isdn: capi: make capi_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 capi_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-v1-2-6f0edca75b61@marliere.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ricardo B. Marliere 2024-03-05 17:04:48 -03:00 committed by Jakub Kicinski
parent 479b4bc867
commit 12fbd67ea3
1 changed files with 12 additions and 9 deletions
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21
drivers/isdn/capi/capi.c
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@ -49,7 +49,9 @@ MODULE_LICENSE("GPL");
/* -------- driver information -------------------------------------- */
static DEFINE_MUTEX(capi_mutex);
static struct class *capi_class;
static const struct class capi_class = {
.name = "capi",
};
static int capi_major = 68; /* allocated */
module_param_named(major, capi_major, uint, 0);
@ -1393,18 +1395,19 @@ static int __init capi_init(void)
kcapi_exit();
return major_ret;
}
capi_class = class_create("capi");
if (IS_ERR(capi_class)) {
ret = class_register(&capi_class);
if (ret) {
unregister_chrdev(capi_major, "capi20");
kcapi_exit();
return PTR_ERR(capi_class);
return ret;
}
device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi20");
device_create(&capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi20");
if (capinc_tty_init() < 0) {
device_destroy(capi_class, MKDEV(capi_major, 0));
class_destroy(capi_class);
device_destroy(&capi_class, MKDEV(capi_major, 0));
class_unregister(&capi_class);
unregister_chrdev(capi_major, "capi20");
kcapi_exit();
return -ENOMEM;
@ -1427,8 +1430,8 @@ static void __exit capi_exit(void)
{
proc_exit();
device_destroy(capi_class, MKDEV(capi_major, 0));
class_destroy(capi_class);
device_destroy(&capi_class, MKDEV(capi_major, 0));
class_unregister(&capi_class);
unregister_chrdev(capi_major, "capi20");
capinc_tty_exit();