Merge tag 'char-misc-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull Char/Misc updates from Greg KH:
 "Here is the big set of char/misc and other driver subsystem updates
  for 6.5-rc1.

  Lots of different, tiny, stuff in here, from a range of smaller driver
  subsystems, including pulls from some substems directly:

   - IIO driver updates and additions

   - W1 driver updates and fixes (and a new maintainer!)

   - FPGA driver updates and fixes

   - Counter driver updates

   - Extcon driver updates

   - Interconnect driver updates

   - Coresight driver updates

   - mfd tree tag merge needed for other updates on top of that, lots of
     small driver updates as patches, including:

   - static const updates for class structures

   - nvmem driver updates

   - pcmcia driver fix

   - lots of other small driver updates and fixes

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

* tag 'char-misc-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (243 commits)
  bsr: fix build problem with bsr_class static cleanup
  comedi: make all 'class' structures const
  char: xillybus: make xillybus_class a static const structure
  xilinx_hwicap: make icap_class a static const structure
  virtio_console: make port class a static const structure
  ppdev: make ppdev_class a static const structure
  char: misc: make misc_class a static const structure
  /dev/mem: make mem_class a static const structure
  char: lp: make lp_class a static const structure
  dsp56k: make dsp56k_class a static const structure
  bsr: make bsr_class a static const structure
  oradax: make 'cl' a static const structure
  hwtracing: hisi_ptt: Fix potential sleep in atomic context
  hwtracing: hisi_ptt: Advertise PERF_PMU_CAP_NO_EXCLUDE for PTT PMU
  hwtracing: hisi_ptt: Export available filters through sysfs
  hwtracing: hisi_ptt: Add support for dynamically updating the filter list
  hwtracing: hisi_ptt: Factor out filter allocation and release operation
  samples: pfsm: add CC_CAN_LINK dependency
  misc: fastrpc: check return value of devm_kasprintf()
  coresight: dummy: Update type of mode parameter in dummy_{sink,source}_enable()
  ...

10 files changed, 112 insertions, 118 deletions

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 801d6c83f8961..625af75833fc3 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -34,6 +34,7 @@ config TTY_PRINTK_LEVEL
 config PRINTER
 	tristate "Parallel printer support"
 	depends on PARPORT
+	depends on HAS_IOPORT || PARPORT_NOT_PC
 	help
 	  If you intend to attach a printer to the parallel port of your Linux
 	  box (as opposed to using a serial printer; if the connector at the
@@ -340,7 +341,7 @@ config NVRAM
 
 config DEVPORT
 	bool "/dev/port character device"
-	depends on ISA || PCI
+	depends on HAS_IOPORT
 	default y
 	help
 	  Say Y here if you want to support the /dev/port device. The /dev/port
diff --git a/drivers/char/bsr.c b/drivers/char/bsr.c
index ff429ba02fa44..12143854aeac2 100644
--- a/drivers/char/bsr.c
+++ b/drivers/char/bsr.c
@@ -61,7 +61,6 @@ struct bsr_dev {
 
 static unsigned total_bsr_devs;
 static LIST_HEAD(bsr_devs);
-static struct class *bsr_class;
 static int bsr_major;
 
 enum {
@@ -108,6 +107,11 @@ static struct attribute *bsr_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(bsr_dev);
 
+static const struct class bsr_class = {
+	.name		= "bsr",
+	.dev_groups	= bsr_dev_groups,
+};
+
 static int bsr_mmap(struct file *filp, struct vm_area_struct *vma)
 {
 	unsigned long size   = vma->vm_end - vma->vm_start;
@@ -244,7 +248,7 @@ static int bsr_add_node(struct device_node *bn)
 			goto out_err;
 		}
 
-		cur->bsr_device = device_create(bsr_class, NULL, cur->bsr_dev,
+		cur->bsr_device = device_create(&bsr_class, NULL, cur->bsr_dev,
 						cur, "%s", cur->bsr_name);
 		if (IS_ERR(cur->bsr_device)) {
 			printk(KERN_ERR "device_create failed for %s\n",
@@ -293,13 +297,9 @@ static int __init bsr_init(void)
 	if (!np)
 		goto out_err;
 
-	bsr_class = class_create("bsr");
-	if (IS_ERR(bsr_class)) {
-		printk(KERN_ERR "class_create() failed for bsr_class\n");
-		ret = PTR_ERR(bsr_class);
+	ret = class_register(&bsr_class);
+	if (ret)
 		goto out_err_1;
-	}
-	bsr_class->dev_groups = bsr_dev_groups;
 
 	ret = alloc_chrdev_region(&bsr_dev, 0, BSR_MAX_DEVS, "bsr");
 	bsr_major = MAJOR(bsr_dev);
@@ -320,7 +320,7 @@ static int __init bsr_init(void)
 	unregister_chrdev_region(bsr_dev, BSR_MAX_DEVS);
 
  out_err_2:
-	class_destroy(bsr_class);
+	class_unregister(&bsr_class);
 
  out_err_1:
 	of_node_put(np);
@@ -335,8 +335,7 @@ static void __exit  bsr_exit(void)
 
 	bsr_cleanup_devs();
 
-	if (bsr_class)
-		class_destroy(bsr_class);
+	class_unregister(&bsr_class);
 
 	if (bsr_major)
 		unregister_chrdev_region(MKDEV(bsr_major, 0), BSR_MAX_DEVS);
diff --git a/drivers/char/dsp56k.c b/drivers/char/dsp56k.c
index b3eaf3e5ef2e2..bda27e595da12 100644
--- a/drivers/char/dsp56k.c
+++ b/drivers/char/dsp56k.c
@@ -101,7 +101,9 @@ static struct dsp56k_device {
 	int tx_wsize, rx_wsize;
 } dsp56k;
 
-static struct class *dsp56k_class;
+static const struct class dsp56k_class = {
+	.name = "dsp56k",
+};
 
 static int dsp56k_reset(void)
 {
@@ -493,7 +495,7 @@ static const char banner[] __initconst = KERN_INFO "DSP56k driver installed\n";
 
 static int __init dsp56k_init_driver(void)
 {
-	int err = 0;
+	int err;
 
 	if(!MACH_IS_ATARI || !ATARIHW_PRESENT(DSP56K)) {
 		printk("DSP56k driver: Hardware not present\n");
@@ -504,12 +506,10 @@ static int __init dsp56k_init_driver(void)
 		printk("DSP56k driver: Unable to register driver\n");
 		return -ENODEV;
 	}
-	dsp56k_class = class_create("dsp56k");
-	if (IS_ERR(dsp56k_class)) {
-		err = PTR_ERR(dsp56k_class);
+	err = class_register(&dsp56k_class);
+	if (err)
 		goto out_chrdev;
-	}
-	device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL,
+	device_create(&dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL,
 		      "dsp56k");
 
 	printk(banner);
@@ -524,8 +524,8 @@ module_init(dsp56k_init_driver);
 
 static void __exit dsp56k_cleanup_driver(void)
 {
-	device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
-	class_destroy(dsp56k_class);
+	device_destroy(&dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
+	class_unregister(&dsp56k_class);
 	unregister_chrdev(DSP56K_MAJOR, "dsp56k");
 }
 module_exit(dsp56k_cleanup_driver);
diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index 70cfc5140c2cb..2f171d14b9b50 100644
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -145,7 +145,9 @@ static struct lp_struct lp_table[LP_NO];
 static int port_num[LP_NO];
 
 static unsigned int lp_count = 0;
-static struct class *lp_class;
+static const struct class lp_class = {
+	.name = "printer",
+};
 
 #ifdef CONFIG_LP_CONSOLE
 static struct parport *console_registered;
@@ -932,7 +934,7 @@ static int lp_register(int nr, struct parport *port)
 	if (reset)
 		lp_reset(nr);
 
-	device_create(lp_class, port->dev, MKDEV(LP_MAJOR, nr), NULL,
+	device_create(&lp_class, port->dev, MKDEV(LP_MAJOR, nr), NULL,
 		      "lp%d", nr);
 
 	printk(KERN_INFO "lp%d: using %s (%s).\n", nr, port->name,
@@ -1004,7 +1006,7 @@ static void lp_detach(struct parport *port)
 		if (port_num[n] == port->number) {
 			port_num[n] = -1;
 			lp_count--;
-			device_destroy(lp_class, MKDEV(LP_MAJOR, n));
+			device_destroy(&lp_class, MKDEV(LP_MAJOR, n));
 			parport_unregister_device(lp_table[n].dev);
 		}
 	}
@@ -1049,11 +1051,9 @@ static int __init lp_init(void)
 		return -EIO;
 	}
 
-	lp_class = class_create("printer");
-	if (IS_ERR(lp_class)) {
-		err = PTR_ERR(lp_class);
+	err = class_register(&lp_class);
+	if (err)
 		goto out_reg;
-	}
 
 	if (parport_register_driver(&lp_driver)) {
 		printk(KERN_ERR "lp: unable to register with parport\n");
@@ -1072,7 +1072,7 @@ static int __init lp_init(void)
 	return 0;
 
 out_class:
-	class_destroy(lp_class);
+	class_unregister(&lp_class);
 out_reg:
 	unregister_chrdev(LP_MAJOR, "lp");
 	return err;
@@ -1115,7 +1115,7 @@ static void lp_cleanup_module(void)
 #endif
 
 	unregister_chrdev(LP_MAJOR, "lp");
-	class_destroy(lp_class);
+	class_unregister(&lp_class);
 }
 
 __setup("lp=", lp_setup);
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 94eff6a2a7b6d..0fcc8615fb4f2 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -746,20 +746,23 @@ static char *mem_devnode(const struct device *dev, umode_t *mode)
 	return NULL;
 }
 
-static struct class *mem_class;
+static const struct class mem_class = {
+	.name		= "mem",
+	.devnode	= mem_devnode,
+};
 
 static int __init chr_dev_init(void)
 {
+	int retval;
 	int minor;
 
 	if (register_chrdev(MEM_MAJOR, "mem", &memory_fops))
 		printk("unable to get major %d for memory devs\n", MEM_MAJOR);
 
-	mem_class = class_create("mem");
-	if (IS_ERR(mem_class))
-		return PTR_ERR(mem_class);
+	retval = class_register(&mem_class);
+	if (retval)
+		return retval;
 
-	mem_class->devnode = mem_devnode;
 	for (minor = 1; minor < ARRAY_SIZE(devlist); minor++) {
 		if (!devlist[minor].name)
 			continue;
@@ -770,7 +773,7 @@ static int __init chr_dev_init(void)
 		if ((minor == DEVPORT_MINOR) && !arch_has_dev_port())
 			continue;
 
-		device_create(mem_class, NULL, MKDEV(MEM_MAJOR, minor),
+		device_create(&mem_class, NULL, MKDEV(MEM_MAJOR, minor),
 			      NULL, devlist[minor].name);
 	}
 
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index 1c44c29a666eb..541edc26ec89a 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -168,7 +168,21 @@ fail:
 	return err;
 }
 
-static struct class *misc_class;
+static char *misc_devnode(const struct device *dev, umode_t *mode)
+{
+	const struct miscdevice *c = dev_get_drvdata(dev);
+
+	if (mode && c->mode)
+		*mode = c->mode;
+	if (c->nodename)
+		return kstrdup(c->nodename, GFP_KERNEL);
+	return NULL;
+}
+
+static const struct class misc_class = {
+	.name		= "misc",
+	.devnode	= misc_devnode,
+};
 
 static const struct file_operations misc_fops = {
 	.owner		= THIS_MODULE,
@@ -226,7 +240,7 @@ int misc_register(struct miscdevice *misc)
 	dev = MKDEV(MISC_MAJOR, misc->minor);
 
 	misc->this_device =
-		device_create_with_groups(misc_class, misc->parent, dev,
+		device_create_with_groups(&misc_class, misc->parent, dev,
 					  misc, misc->groups, "%s", misc->name);
 	if (IS_ERR(misc->this_device)) {
 		if (is_dynamic) {
@@ -263,43 +277,30 @@ void misc_deregister(struct miscdevice *misc)
 
 	mutex_lock(&misc_mtx);
 	list_del(&misc->list);
-	device_destroy(misc_class, MKDEV(MISC_MAJOR, misc->minor));
+	device_destroy(&misc_class, MKDEV(MISC_MAJOR, misc->minor));
 	misc_minor_free(misc->minor);
 	mutex_unlock(&misc_mtx);
 }
 EXPORT_SYMBOL(misc_deregister);
 
-static char *misc_devnode(const struct device *dev, umode_t *mode)
-{
-	const struct miscdevice *c = dev_get_drvdata(dev);
-
-	if (mode && c->mode)
-		*mode = c->mode;
-	if (c->nodename)
-		return kstrdup(c->nodename, GFP_KERNEL);
-	return NULL;
-}
-
 static int __init misc_init(void)
 {
 	int err;
 	struct proc_dir_entry *ret;
 
 	ret = proc_create_seq("misc", 0, NULL, &misc_seq_ops);
-	misc_class = class_create("misc");
-	err = PTR_ERR(misc_class);
-	if (IS_ERR(misc_class))
+	err = class_register(&misc_class);
+	if (err)
 		goto fail_remove;
 
 	err = -EIO;
 	if (register_chrdev(MISC_MAJOR, "misc", &misc_fops))
 		goto fail_printk;
-	misc_class->devnode = misc_devnode;
 	return 0;
 
 fail_printk:
 	pr_err("unable to get major %d for misc devices\n", MISC_MAJOR);
-	class_destroy(misc_class);
+	class_unregister(&misc_class);
 fail_remove:
 	if (ret)
 		remove_proc_entry("misc", NULL);
diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index 81ed58157b157..4c188e9e477cd 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -773,7 +773,9 @@ static __poll_t pp_poll(struct file *file, poll_table *wait)
 	return mask;
 }
 
-static struct class *ppdev_class;
+static const struct class ppdev_class = {
+	.name = CHRDEV,
+};
 
 static const struct file_operations pp_fops = {
 	.owner		= THIS_MODULE,
@@ -794,7 +796,7 @@ static void pp_attach(struct parport *port)
 	if (devices[port->number])
 		return;
 
-	ret = device_create(ppdev_class, port->dev,
+	ret = device_create(&ppdev_class, port->dev,
 			    MKDEV(PP_MAJOR, port->number), NULL,
 			    "parport%d", port->number);
 	if (IS_ERR(ret)) {
@@ -810,7 +812,7 @@ static void pp_detach(struct parport *port)
 	if (!devices[port->number])
 		return;
 
-	device_destroy(ppdev_class, MKDEV(PP_MAJOR, port->number));
+	device_destroy(&ppdev_class, MKDEV(PP_MAJOR, port->number));
 	devices[port->number] = NULL;
 }
 
@@ -841,11 +843,10 @@ static int __init ppdev_init(void)
 		pr_warn(CHRDEV ": unable to get major %d\n", PP_MAJOR);
 		return -EIO;
 	}
-	ppdev_class = class_create(CHRDEV);
-	if (IS_ERR(ppdev_class)) {
-		err = PTR_ERR(ppdev_class);
+	err = class_register(&ppdev_class);
+	if (err)
 		goto out_chrdev;
-	}
+
 	err = parport_register_driver(&pp_driver);
 	if (err < 0) {
 		pr_warn(CHRDEV ": unable to register with parport\n");
@@ -856,7 +857,7 @@ static int __init ppdev_init(void)
 	goto out;
 
 out_class:
-	class_destroy(ppdev_class);
+	class_unregister(&ppdev_class);
 out_chrdev:
 	unregister_chrdev(PP_MAJOR, CHRDEV);
 out:
@@ -867,7 +868,7 @@ static void __exit ppdev_cleanup(void)
 {
 	/* Clean up all parport stuff */
 	parport_unregister_driver(&pp_driver);
-	class_destroy(ppdev_class);
+	class_unregister(&ppdev_class);
 	unregister_chrdev(PP_MAJOR, CHRDEV);
 }
 
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index b65c809a4e978..1f8da0a71ce93 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -40,9 +40,6 @@
  * across multiple devices and multiple ports per device.
  */
 struct ports_driver_data {
-	/* Used for registering chardevs */
-	struct class *class;
-
 	/* Used for exporting per-port information to debugfs */
 	struct dentry *debugfs_dir;
 
@@ -55,6 +52,10 @@ struct ports_driver_data {
 
 static struct ports_driver_data pdrvdata;
 
+static const struct class port_class = {
+	.name = "virtio-ports",
+};
+
 static DEFINE_SPINLOCK(pdrvdata_lock);
 static DECLARE_COMPLETION(early_console_added);
 
@@ -1399,7 +1400,7 @@ static int add_port(struct ports_device *portdev, u32 id)
 			"Error %d adding cdev for port %u\n", err, id);
 		goto free_cdev;
 	}
-	port->dev = device_create(pdrvdata.class, &port->portdev->vdev->dev,
+	port->dev = device_create(&port_class, &port->portdev->vdev->dev,
 				  devt, port, "vport%up%u",
 				  port->portdev->vdev->index, id);
 	if (IS_ERR(port->dev)) {
@@ -1465,7 +1466,7 @@ static int add_port(struct ports_device *portdev, u32 id)
 
 free_inbufs:
 free_device:
-	device_destroy(pdrvdata.class, port->dev->devt);
+	device_destroy(&port_class, port->dev->devt);
 free_cdev:
 	cdev_del(port->cdev);
 free_port:
@@ -1540,7 +1541,7 @@ static void unplug_port(struct port *port)
 	port->portdev = NULL;
 
 	sysfs_remove_group(&port->dev->kobj, &port_attribute_group);
-	device_destroy(pdrvdata.class, port->dev->devt);
+	device_destroy(&port_class, port->dev->devt);
 	cdev_del(port->cdev);
 
 	debugfs_remove(port->debugfs_file);
@@ -2244,12 +2245,9 @@ static int __init virtio_console_init(void)
 {
 	int err;
 
-	pdrvdata.class = class_create("virtio-ports");
-	if (IS_ERR(pdrvdata.class)) {
-		err = PTR_ERR(pdrvdata.class);
-		pr_err("Error %d creating virtio-ports class\n", err);
+	err = class_register(&port_class);
+	if (err)
 		return err;
-	}
 
 	pdrvdata.debugfs_dir = debugfs_create_dir("virtio-ports", NULL);
 	INIT_LIST_HEAD(&pdrvdata.consoles);
@@ -2271,7 +2269,7 @@ unregister:
 	unregister_virtio_driver(&virtio_console);
 free:
 	debugfs_remove_recursive(pdrvdata.debugfs_dir);
-	class_destroy(pdrvdata.class);
+	class_unregister(&port_class);
 	return err;
 }
 
@@ -2282,7 +2280,7 @@ static void __exit virtio_console_fini(void)
 	unregister_virtio_driver(&virtio_console);
 	unregister_virtio_driver(&virtio_rproc_serial);
 
-	class_destroy(pdrvdata.class);
+	class_unregister(&port_class);
 	debugfs_remove_recursive(pdrvdata.debugfs_dir);
 }
 module_init(virtio_console_init);
diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
index a46f637da9599..f60bb6151402f 100644
--- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
+++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
@@ -113,7 +113,9 @@ static DEFINE_MUTEX(hwicap_mutex);
 static bool probed_devices[HWICAP_DEVICES];
 static struct mutex icap_sem;
 
-static struct class *icap_class;
+static const struct class icap_class = {
+	.name = "xilinx_config",
+};
 
 #define UNIMPLEMENTED 0xFFFF
 
@@ -687,7 +689,7 @@ static int hwicap_setup(struct device *dev, int id,
 		goto failed3;
 	}
 
-	device_create(icap_class, dev, devt, NULL, "%s%d", DRIVER_NAME, id);
+	device_create(&icap_class, dev, devt, NULL, "%s%d", DRIVER_NAME, id);
 	return 0;		/* success */
 
  failed3:
@@ -721,27 +723,6 @@ static struct hwicap_driver_config fifo_icap_config = {
 	.reset = fifo_icap_reset,
 };
 
-static int hwicap_remove(struct device *dev)
-{
-	struct hwicap_drvdata *drvdata;
-
-	drvdata = dev_get_drvdata(dev);
-
-	if (!drvdata)
-		return 0;
-
-	device_destroy(icap_class, drvdata->devt);
-	cdev_del(&drvdata->cdev);
-	iounmap(drvdata->base_address);
-	release_mem_region(drvdata->mem_start, drvdata->mem_size);
-	kfree(drvdata);
-
-	mutex_lock(&icap_sem);
-	probed_devices[MINOR(dev->devt)-XHWICAP_MINOR] = 0;
-	mutex_unlock(&icap_sem);
-	return 0;		/* success */
-}
-
 #ifdef CONFIG_OF
 static int hwicap_of_probe(struct platform_device *op,
 				     const struct hwicap_driver_config *config)
@@ -825,9 +806,22 @@ static int hwicap_drv_probe(struct platform_device *pdev)
 			&buffer_icap_config, regs);
 }
 
-static int hwicap_drv_remove(struct platform_device *pdev)
+static void hwicap_drv_remove(struct platform_device *pdev)
 {
-	return hwicap_remove(&pdev->dev);
+	struct device *dev = &pdev->dev;
+	struct hwicap_drvdata *drvdata;
+
+	drvdata = dev_get_drvdata(dev);
+
+	device_destroy(&icap_class, drvdata->devt);
+	cdev_del(&drvdata->cdev);
+	iounmap(drvdata->base_address);
+	release_mem_region(drvdata->mem_start, drvdata->mem_size);
+	kfree(drvdata);
+
+	mutex_lock(&icap_sem);
+	probed_devices[MINOR(dev->devt)-XHWICAP_MINOR] = 0;
+	mutex_unlock(&icap_sem);
 }
 
 #ifdef CONFIG_OF
@@ -844,7 +838,7 @@ MODULE_DEVICE_TABLE(of, hwicap_of_match);
 
 static struct platform_driver hwicap_platform_driver = {
 	.probe = hwicap_drv_probe,
-	.remove = hwicap_drv_remove,
+	.remove_new = hwicap_drv_remove,
 	.driver = {
 		.name = DRIVER_NAME,
 		.of_match_table = hwicap_of_match,
@@ -856,7 +850,9 @@ static int __init hwicap_module_init(void)
 	dev_t devt;
 	int retval;
 
-	icap_class = class_create("xilinx_config");
+	retval = class_register(&icap_class);
+	if (retval)
+		return retval;
 	mutex_init(&icap_sem);
 
 	devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR);
@@ -882,7 +878,7 @@ static void __exit hwicap_module_cleanup(void)
 {
 	dev_t devt = MKDEV(XHWICAP_MAJOR, XHWICAP_MINOR);
 
-	class_destroy(icap_class);
+	class_unregister(&icap_class);
 
 	platform_driver_unregister(&hwicap_platform_driver);
 
diff --git a/drivers/char/xillybus/xillybus_class.c b/drivers/char/xillybus/xillybus_class.c
index 89926fe9d8130..c92a628e389ee 100644
--- a/drivers/char/xillybus/xillybus_class.c
+++ b/drivers/char/xillybus/xillybus_class.c
@@ -23,7 +23,9 @@ MODULE_LICENSE("GPL v2");
 
 static DEFINE_MUTEX(unit_mutex);
 static LIST_HEAD(unit_list);
-static struct class *xillybus_class;
+static const struct class xillybus_class = {
+	.name = "xillybus",
+};
 
 #define UNITNAMELEN 16
 
@@ -121,7 +123,7 @@ int xillybus_init_chrdev(struct device *dev,
 		len -= namelen + 1;
 		idt += namelen + 1;
 
-		device = device_create(xillybus_class,
+		device = device_create(&xillybus_class,
 				       NULL,
 				       MKDEV(unit->major,
 					     i + unit->lowest_minor),
@@ -152,7 +154,7 @@ int xillybus_init_chrdev(struct device *dev,
 
 unroll_device_create:
 	for (i--; i >= 0; i--)
-		device_destroy(xillybus_class, MKDEV(unit->major,
+		device_destroy(&xillybus_class, MKDEV(unit->major,
 						     i + unit->lowest_minor));
 
 	cdev_del(unit->cdev);
@@ -193,7 +195,7 @@ void xillybus_cleanup_chrdev(void *private_data,
 	for (minor = unit->lowest_minor;
 	     minor < (unit->lowest_minor + unit->num_nodes);
 	     minor++)
-		device_destroy(xillybus_class, MKDEV(unit->major, minor));
+		device_destroy(&xillybus_class, MKDEV(unit->major, minor));
 
 	cdev_del(unit->cdev);
 
@@ -242,19 +244,12 @@ EXPORT_SYMBOL(xillybus_find_inode);
 
 static int __init xillybus_class_init(void)
 {
-	xillybus_class = class_create("xillybus");
-
-	if (IS_ERR(xillybus_class)) {
-		pr_warn("Failed to register xillybus class\n");
-
-		return PTR_ERR(xillybus_class);
-	}
-	return 0;
+	return class_register(&xillybus_class);
 }
 
 static void __exit xillybus_class_exit(void)
 {
-	class_destroy(xillybus_class);
+	class_unregister(&xillybus_class);
 }
 
 module_init(xillybus_class_init);