RDMA: Make all 'class' structures const

Now that the driver core allows for struct class to be in read-only
memory, making all 'class' structures to be declared at build time
placing them into read-only memory, instead of having to be dynamically
allocated at load time.

Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Cc: "Md. Haris Iqbal" <haris.iqbal@ionos.com>
Cc: Jack Wang <jinpu.wang@ionos.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Yishai Hadas <yishaih@nvidia.com>
Cc: Ivan Orlov <ivan.orlov0322@gmail.com>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/2023080427-commuting-crewless-cbee@gregkh
Signed-off-by: Leon Romanovsky <leon@kernel.org>

1 files changed, 8 insertions, 7 deletions

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index c38901e2c8f4..75e56604e462 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -27,7 +27,9 @@ MODULE_LICENSE("GPL");
 #define MAX_HDR_SIZE PAGE_SIZE
 
 static struct rtrs_rdma_dev_pd dev_pd;
-struct class *rtrs_dev_class;
+const struct class rtrs_dev_class = {
+	.name = "rtrs-server",
+};
 static struct rtrs_srv_ib_ctx ib_ctx;
 
 static int __read_mostly max_chunk_size = DEFAULT_MAX_CHUNK_SIZE;
@@ -2253,11 +2255,10 @@ static int __init rtrs_server_init(void)
 		       err);
 		return err;
 	}
-	rtrs_dev_class = class_create("rtrs-server");
-	if (IS_ERR(rtrs_dev_class)) {
-		err = PTR_ERR(rtrs_dev_class);
+	err = class_register(&rtrs_dev_class);
+	if (err)
 		goto out_err;
-	}
+
 	rtrs_wq = alloc_workqueue("rtrs_server_wq", 0, 0);
 	if (!rtrs_wq) {
 		err = -ENOMEM;
@@ -2267,7 +2268,7 @@ static int __init rtrs_server_init(void)
 	return 0;
 
 out_dev_class:
-	class_destroy(rtrs_dev_class);
+	class_unregister(&rtrs_dev_class);
 out_err:
 	return err;
 }
@@ -2275,7 +2276,7 @@ out_err:
 static void __exit rtrs_server_exit(void)
 {
 	destroy_workqueue(rtrs_wq);
-	class_destroy(rtrs_dev_class);
+	class_unregister(&rtrs_dev_class);
 	rtrs_rdma_dev_pd_deinit(&dev_pd);
 }