Merge tag 'driver-core-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the large set of driver core changes for 6.4-rc1.

  Once again, a busy development cycle, with lots of changes happening
  in the driver core in the quest to be able to move "struct bus" and
  "struct class" into read-only memory, a task now complete with these
  changes.

  This will make the future rust interactions with the driver core more
  "provably correct" as well as providing more obvious lifetime rules
  for all busses and classes in the kernel.

  The changes required for this did touch many individual classes and
  busses as many callbacks were changed to take const * parameters
  instead. All of these changes have been submitted to the various
  subsystem maintainers, giving them plenty of time to review, and most
  of them actually did so.

  Other than those changes, included in here are a small set of other
  things:

   - kobject logging improvements

   - cacheinfo improvements and updates

   - obligatory fw_devlink updates and fixes

   - documentation updates

   - device property cleanups and const * changes

   - firwmare loader dependency fixes.

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'driver-core-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (120 commits)
  device property: make device_property functions take const device *
  driver core: update comments in device_rename()
  driver core: Don't require dynamic_debug for initcall_debug probe timing
  firmware_loader: rework crypto dependencies
  firmware_loader: Strip off \n from customized path
  zram: fix up permission for the hot_add sysfs file
  cacheinfo: Add use_arch[|_cache]_info field/function
  arch_topology: Remove early cacheinfo error message if -ENOENT
  cacheinfo: Check cache properties are present in DT
  cacheinfo: Check sib_leaf in cache_leaves_are_shared()
  cacheinfo: Allow early level detection when DT/ACPI info is missing/broken
  cacheinfo: Add arm64 early level initializer implementation
  cacheinfo: Add arch specific early level initializer
  tty: make tty_class a static const structure
  driver core: class: remove struct class_interface * from callbacks
  driver core: class: mark the struct class in struct class_interface constant
  driver core: class: make class_register() take a const *
  driver core: class: mark class_release() as taking a const *
  driver core: remove incorrect comment for device_create*
  MIPS: vpe-cmp: remove module owner pointer from struct class usage.
  ...

4 files changed, 15 insertions, 17 deletions

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 07394fdaf522..2b1c8ab99dba 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -931,7 +931,7 @@ static void __init unix98_pty_init(void)
 	if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
 		panic("Couldn't register /dev/ptmx driver");
-	device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
+	device_create(&tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
 }
 
 #else
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index cfb3da0dee47..c84be40fb8df 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -3070,7 +3070,7 @@ static struct device *tty_get_device(struct tty_struct *tty)
 {
 	dev_t devt = tty_devnum(tty);
 
-	return class_find_device_by_devt(tty_class, devt);
+	return class_find_device_by_devt(&tty_class, devt);
 }
 
 
@@ -3143,8 +3143,6 @@ int tty_put_char(struct tty_struct *tty, unsigned char ch)
 }
 EXPORT_SYMBOL_GPL(tty_put_char);
 
-struct class *tty_class;
-
 static int tty_cdev_add(struct tty_driver *driver, dev_t dev,
 		unsigned int index, unsigned int count)
 {
@@ -3239,7 +3237,7 @@ struct device *tty_register_device_attr(struct tty_driver *driver,
 		return ERR_PTR(-ENOMEM);
 
 	dev->devt = devt;
-	dev->class = tty_class;
+	dev->class = &tty_class;
 	dev->parent = device;
 	dev->release = tty_device_create_release;
 	dev_set_name(dev, "%s", name);
@@ -3294,8 +3292,7 @@ EXPORT_SYMBOL_GPL(tty_register_device_attr);
  */
 void tty_unregister_device(struct tty_driver *driver, unsigned index)
 {
-	device_destroy(tty_class,
-		MKDEV(driver->major, driver->minor_start) + index);
+	device_destroy(&tty_class, MKDEV(driver->major, driver->minor_start) + index);
 	if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) {
 		cdev_del(driver->cdevs[index]);
 		driver->cdevs[index] = NULL;
@@ -3510,13 +3507,14 @@ static char *tty_devnode(const struct device *dev, umode_t *mode)
 	return NULL;
 }
 
+const struct class tty_class = {
+	.name		= "tty",
+	.devnode	= tty_devnode,
+};
+
 static int __init tty_class_init(void)
 {
-	tty_class = class_create(THIS_MODULE, "tty");
-	if (IS_ERR(tty_class))
-		return PTR_ERR(tty_class);
-	tty_class->devnode = tty_devnode;
-	return 0;
+	return class_register(&tty_class);
 }
 
 postcore_initcall(tty_class_init);
@@ -3625,13 +3623,13 @@ int __init tty_init(void)
 	if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
 		panic("Couldn't register /dev/tty driver\n");
-	device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty");
+	device_create(&tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty");
 
 	cdev_init(&console_cdev, &console_fops);
 	if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
 		panic("Couldn't register /dev/console driver\n");
-	consdev = device_create_with_groups(tty_class, NULL,
+	consdev = device_create_with_groups(&tty_class, NULL,
 					    MKDEV(TTYAUX_MAJOR, 1), NULL,
 					    cons_dev_groups, "console");
 	if (IS_ERR(consdev))
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index 1dc07f9214d5..498ba9c0ee93 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -804,7 +804,7 @@ 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(THIS_MODULE, "vc");
+	vc_class = class_create("vc");
 
 	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs");
 	device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 64), NULL, "vcsu");
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 5c5ca74c03af..1e8e57b45688 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3541,7 +3541,7 @@ int __init vty_init(const struct file_operations *console_fops)
 	if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
 	    register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
 		panic("Couldn't register /dev/tty0 driver\n");
-	tty0dev = device_create_with_groups(tty_class, NULL,
+	tty0dev = device_create_with_groups(&tty_class, NULL,
 					    MKDEV(TTY_MAJOR, 0), NULL,
 					    vt_dev_groups, "tty0");
 	if (IS_ERR(tty0dev))
@@ -4242,7 +4242,7 @@ static int __init vtconsole_class_init(void)
 {
 	int i;
 
-	vtconsole_class = class_create(THIS_MODULE, "vtconsole");
+	vtconsole_class = class_create("vtconsole");
 	if (IS_ERR(vtconsole_class)) {
 		pr_warn("Unable to create vt console class; errno = %ld\n",
 			PTR_ERR(vtconsole_class));