Merge tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is a small set of driver core updates and additions for 6.6-rc1.

  Included in here are:

   - stable kernel documentation updates

   - class structure const work from Ivan on various subsystems

   - kernfs tweaks

   - driver core tests!

   - kobject sanity cleanups

   - kobject structure reordering to save space

   - driver core error code handling fixups

   - other minor driver core cleanups

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

* tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits)
  driver core: Call in reversed order in device_platform_notify_remove()
  driver core: Return proper error code when dev_set_name() fails
  kobject: Remove redundant checks for whether ktype is NULL
  kobject: Add sanity check for kset->kobj.ktype in kset_register()
  drivers: base: test: Add missing MODULE_* macros to root device tests
  drivers: base: test: Add missing MODULE_* macros for platform devices tests
  drivers: base: Free devm resources when unregistering a device
  drivers: base: Add basic devm tests for platform devices
  drivers: base: Add basic devm tests for root devices
  kernfs: fix missing kernfs_iattr_rwsem locking
  docs: stable-kernel-rules: mention that regressions must be prevented
  docs: stable-kernel-rules: fine-tune various details
  docs: stable-kernel-rules: make the examples for option 1 a proper list
  docs: stable-kernel-rules: move text around to improve flow
  docs: stable-kernel-rules: improve structure by changing headlines
  base/node: Remove duplicated include
  kernfs: attach uuid for every kernfs and report it in fsid
  kernfs: add stub helper for kernfs_generic_poll()
  x86/resctrl: make pseudo_lock_class a static const structure
  x86/MSR: make msr_class a static const structure
  ...

4 files changed, 20 insertions, 18 deletions

diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index ea6b4013bc38..23f6f2eda84c 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -28,8 +28,13 @@
 DEFINE_IDR(dev_nums_idr);
 static DEFINE_MUTEX(idr_lock);
 
-struct class *tpm_class;
-struct class *tpmrm_class;
+const struct class tpm_class = {
+	.name = "tpm",
+	.shutdown_pre = tpm_class_shutdown,
+};
+const struct class tpmrm_class = {
+	.name = "tmprm",
+};
 dev_t tpm_devt;
 
 static int tpm_request_locality(struct tpm_chip *chip)
@@ -336,7 +341,7 @@ struct tpm_chip *tpm_chip_alloc(struct device *pdev,
 
 	device_initialize(&chip->dev);
 
-	chip->dev.class = tpm_class;
+	chip->dev.class = &tpm_class;
 	chip->dev.release = tpm_dev_release;
 	chip->dev.parent = pdev;
 	chip->dev.groups = chip->groups;
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 586ca10b0d72..66b16d26eecc 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -476,18 +476,15 @@ static int __init tpm_init(void)
 {
 	int rc;
 
-	tpm_class = class_create("tpm");
-	if (IS_ERR(tpm_class)) {
+	rc = class_register(&tpm_class);
+	if (rc) {
 		pr_err("couldn't create tpm class\n");
-		return PTR_ERR(tpm_class);
+		return rc;
 	}
 
-	tpm_class->shutdown_pre = tpm_class_shutdown;
-
-	tpmrm_class = class_create("tpmrm");
-	if (IS_ERR(tpmrm_class)) {
+	rc = class_register(&tpmrm_class);
+	if (rc) {
 		pr_err("couldn't create tpmrm class\n");
-		rc = PTR_ERR(tpmrm_class);
 		goto out_destroy_tpm_class;
 	}
 
@@ -508,9 +505,9 @@ static int __init tpm_init(void)
 out_unreg_chrdev:
 	unregister_chrdev_region(tpm_devt, 2 * TPM_NUM_DEVICES);
 out_destroy_tpmrm_class:
-	class_destroy(tpmrm_class);
+	class_unregister(&tpmrm_class);
 out_destroy_tpm_class:
-	class_destroy(tpm_class);
+	class_unregister(&tpm_class);
 
 	return rc;
 }
@@ -518,8 +515,8 @@ out_destroy_tpm_class:
 static void __exit tpm_exit(void)
 {
 	idr_destroy(&dev_nums_idr);
-	class_destroy(tpm_class);
-	class_destroy(tpmrm_class);
+	class_unregister(&tpm_class);
+	class_unregister(&tpmrm_class);
 	unregister_chrdev_region(tpm_devt, 2*TPM_NUM_DEVICES);
 	tpm_dev_common_exit();
 }
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 460bb85dd142..61445f1dc46d 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -230,8 +230,8 @@ enum tpm2_pt_props {
  * compiler warnings about stack frame size. */
 #define TPM_MAX_RNG_DATA	128
 
-extern struct class *tpm_class;
-extern struct class *tpmrm_class;
+extern const struct class tpm_class;
+extern const struct class tpmrm_class;
 extern dev_t tpm_devt;
 extern const struct file_operations tpm_fops;
 extern const struct file_operations tpmrm_fops;
diff --git a/drivers/char/tpm/tpm2-space.c b/drivers/char/tpm/tpm2-space.c
index ffb35f0154c1..363afdd4d1d3 100644
--- a/drivers/char/tpm/tpm2-space.c
+++ b/drivers/char/tpm/tpm2-space.c
@@ -606,7 +606,7 @@ int tpm_devs_add(struct tpm_chip *chip)
 
 	device_initialize(&chip->devs);
 	chip->devs.parent = chip->dev.parent;
-	chip->devs.class = tpmrm_class;
+	chip->devs.class = &tpmrm_class;
 
 	/*
 	 * Get extra reference on main device to hold on behalf of devs.