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authorRicardo B. Marliere <ricardo@marliere.net>2024-03-05 23:04:48 +0300
committerJakub Kicinski <kuba@kernel.org>2024-03-08 07:26:24 +0300
commit12fbd67ea3f4d3308057f312047fd161e5670d21 (patch)
treeec135366686a9b6301291860af8754fb10c91fba /drivers/isdn
parent479b4bc867b9f7792a807f32118890d97609aeab (diff)
downloadlinux-12fbd67ea3f4d3308057f312047fd161e5670d21.tar.xz
isdn: capi: make capi_class constant
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 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>
Diffstat (limited to 'drivers/isdn')
-rw-r--r--drivers/isdn/capi/capi.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 6e80d7bd3c4d..3ed257334562 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -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();