From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 5 Oct 2023 13:33:48 +0000 (+0200)
Subject: tty: vc_screen: make vc_class constant
X-Git-Tag: v6.7-rc1~75^2~64
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=5a1cc96352b29e83c70714235ed6cbed0dcf5b8b;p=thirdparty%2Flinux.git

tty: vc_screen: make vc_class constant

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: Jiri Slaby <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/2023100549-sixth-anger-ac34@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index 99c8e39d91b4b..67e2cb7c96eec 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -786,23 +786,22 @@ static const struct file_operations vcs_fops = {
 	.release	= vcs_release,
 };
 
-static struct class *vc_class;
+static const struct class vc_class = {
+	.name = "vc",
+};
 
 void vcs_make_sysfs(int index)
 {
-	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, index + 1), NULL,
-		      "vcs%u", index + 1);
-	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, index + 65), NULL,
-		      "vcsu%u", index + 1);
-	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, index + 129), NULL,
-		      "vcsa%u", index + 1);
+	device_create(&vc_class, NULL, MKDEV(VCS_MAJOR, index + 1), NULL, "vcs%u", index + 1);
+	device_create(&vc_class, NULL, MKDEV(VCS_MAJOR, index + 65), NULL, "vcsu%u", index + 1);
+	device_create(&vc_class, NULL, MKDEV(VCS_MAJOR, index + 129), NULL, "vcsa%u", index + 1);
 }
 
 void vcs_remove_sysfs(int index)
 {
-	device_destroy(vc_class, MKDEV(VCS_MAJOR, index + 1));
-	device_destroy(vc_class, MKDEV(VCS_MAJOR, index + 65));
-	device_destroy(vc_class, MKDEV(VCS_MAJOR, index + 129));
+	device_destroy(&vc_class, MKDEV(VCS_MAJOR, index + 1));
+	device_destroy(&vc_class, MKDEV(VCS_MAJOR, index + 65));
+	device_destroy(&vc_class, MKDEV(VCS_MAJOR, index + 129));
 }
 
 int __init vcs_init(void)
@@ -811,11 +810,12 @@ int __init vcs_init(void)
 
 	if (register_chrdev(VCS_MAJOR, "vcs", &vcs_fops))
 		panic("unable to get major %d for vcs device", VCS_MAJOR);
-	vc_class = class_create("vc");
+	if (class_register(&vc_class))
+		panic("unable to create vc_class");
 
-	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs");
-	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 64), NULL, "vcsu");
-	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 128), NULL, "vcsa");
+	device_create(&vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs");
+	device_create(&vc_class, NULL, MKDEV(VCS_MAJOR, 64), NULL, "vcsu");
+	device_create(&vc_class, NULL, MKDEV(VCS_MAJOR, 128), NULL, "vcsa");
 	for (i = 0; i < MIN_NR_CONSOLES; i++)
 		vcs_make_sysfs(i);
 	return 0;