Merge tag 'driver-core-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH: "Here is the big set of driver core patches for 5.15-rc1. These do change a number of different things across different subsystems, and because of that, there were 2 stable tags created that might have already come into your tree from different pulls that did the following - changed the bus remove callback to return void - sysfs iomem_get_mapping rework Other than those two things, there's only a few small things in here: - kernfs performance improvements for huge numbers of sysfs users at once - tiny api cleanups - other minor changes All of these have been in linux-next for a while with no reported problems, other than the before-mentioned merge issue" * tag 'driver-core-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (33 commits) MAINTAINERS: Add dri-devel for component.[hc] driver core: platform: Remove platform_device_add_properties() ARM: tegra: paz00: Handle device properties with software node API bitmap: extend comment to bitmap_print_bitmask/list_to_buf drivers/base/node.c: use bin_attribute to break the size limitation of cpumap ABI topology: use bin_attribute to break the size limitation of cpumap ABI lib: test_bitmap: add bitmap_print_bitmask/list_to_buf test cases cpumask: introduce cpumap_print_list/bitmask_to_buf to support large bitmask and list sysfs: Rename struct bin_attribute member to f_mapping sysfs: Invoke iomem_get_mapping() from the sysfs open callback debugfs: Return error during {full/open}_proxy_open() on rmmod zorro: Drop useless (and hardly used) .driver member in struct zorro_dev zorro: Simplify remove callback sh: superhyway: Simplify check in remove callback nubus: Simplify check in remove callback nubus: Make struct nubus_driver::remove return void kernfs: dont call d_splice_alias() under kernfs node lock kernfs: use i_lock to protect concurrent inode updates kernfs: switch kernfs to use an rwsem kernfs: use VFS negative dentry caching ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2021-09-01 17:44:42 +0200
committer: Linus Torvalds <torvalds@linux-foundation.org> 2021-09-01 17:44:42 +0200
commit: c6c3c5704ba70820f6b632982abde06661b7222a (patch)
tree: 731e00452853789a90d9333508074e95ea1dc012
parent: Merge tag 'char-misc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff)
parent: MAINTAINERS: Add dri-devel for component.[hc] (diff)
download: linux-c6c3c5704ba70820f6b632982abde06661b7222a.tar.xz
linux-c6c3c5704ba70820f6b632982abde06661b7222a.zip
126 files changed, 729 insertions, 512 deletions
diff --git a/MAINTAINERS b/MAINTAINERS
index f3267183e993..f6914e5206fd 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5725,6 +5725,11 @@ F:	Documentation/admin-guide/blockdev/
 F:	drivers/block/drbd/
 F:	lib/lru_cache.c
 
+DRIVER COMPONENT FRAMEWORK
+L:	dri-devel@lists.freedesktop.org
+F:	drivers/base/component.c
+F:	include/linux/component.h
+
 DRIVER CORE, KOBJECTS, DEBUGFS AND SYSFS
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 R:	"Rafael J. Wysocki" <rafael@kernel.org>
diff --git a/arch/arm/common/locomo.c b/arch/arm/common/locomo.c
index e45f4e4e06b6..24d21ba63030 100644
--- a/arch/arm/common/locomo.c
+++ b/arch/arm/common/locomo.c
@@ -834,14 +834,13 @@ static int locomo_bus_probe(struct device *dev)
 	return ret;
 }
 
-static int locomo_bus_remove(struct device *dev)
+static void locomo_bus_remove(struct device *dev)
 {
 	struct locomo_dev *ldev = LOCOMO_DEV(dev);
 	struct locomo_driver *drv = LOCOMO_DRV(dev->driver);
 
 	if (drv->remove)
 		drv->remove(ldev);
-	return 0;
 }
 
 struct bus_type locomo_bus_type = {
diff --git a/arch/arm/common/sa1111.c b/arch/arm/common/sa1111.c
index d17083c3fe2d..5367f03beb46 100644
--- a/arch/arm/common/sa1111.c
+++ b/arch/arm/common/sa1111.c
@@ -1356,15 +1356,13 @@ static int sa1111_bus_probe(struct device *dev)
 	return ret;
 }
 
-static int sa1111_bus_remove(struct device *dev)
+static void sa1111_bus_remove(struct device *dev)
 {
 	struct sa1111_dev *sadev = to_sa1111_device(dev);
 	struct sa1111_driver *drv = SA1111_DRV(dev->driver);
 
 	if (drv->remove)
 		drv->remove(sadev);
-
-	return 0;
 }
 
 struct bus_type sa1111_bus_type = {
diff --git a/arch/arm/mach-rpc/ecard.c b/arch/arm/mach-rpc/ecard.c
index 827b50f1c73e..53813f9464a2 100644
--- a/arch/arm/mach-rpc/ecard.c
+++ b/arch/arm/mach-rpc/ecard.c
@@ -1052,7 +1052,7 @@ static int ecard_drv_probe(struct device *dev)
 	return ret;
 }
 
-static int ecard_drv_remove(struct device *dev)
+static void ecard_drv_remove(struct device *dev)
 {
 	struct expansion_card *ec = ECARD_DEV(dev);
 	struct ecard_driver *drv = ECARD_DRV(dev->driver);
@@ -1067,8 +1067,6 @@ static int ecard_drv_remove(struct device *dev)
 	ec->ops = &ecard_default_ops;
 	barrier();
 	ec->irq_data = NULL;
-
-	return 0;
 }
 
 /*
diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index b5c990a7a5af..18d37f90cdfe 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -36,7 +36,7 @@ static struct gpiod_lookup_table wifi_gpio_lookup = {
 
 void __init tegra_paz00_wifikill_init(void)
 {
-	platform_device_add_properties(&wifi_rfkill_device, wifi_rfkill_prop);
+	device_create_managed_software_node(&wifi_rfkill_device.dev, wifi_rfkill_prop, NULL);
 	gpiod_add_lookup_table(&wifi_gpio_lookup);
 	platform_device_register(&wifi_rfkill_device);
 }
diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
index de0768a49ee8..dfc52f661ad0 100644
--- a/arch/mips/sgi-ip22/ip22-gio.c
+++ b/arch/mips/sgi-ip22/ip22-gio.c
@@ -143,14 +143,13 @@ static int gio_device_probe(struct device *dev)
 	return error;
 }
 
-static int gio_device_remove(struct device *dev)
+static void gio_device_remove(struct device *dev)
 {
 	struct gio_device *gio_dev = to_gio_device(dev);
 	struct gio_driver *drv = to_gio_driver(dev->driver);
 
 	if (dev->driver && drv->remove)
 		drv->remove(gio_dev);
-	return 0;
 }
 
 static void gio_device_shutdown(struct device *dev)
diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c
index 80fa0650736b..776d624a7207 100644
--- a/arch/parisc/kernel/drivers.c
+++ b/arch/parisc/kernel/drivers.c
@@ -133,14 +133,13 @@ static int parisc_driver_probe(struct device *dev)
 	return rc;
 }
 
-static int __exit parisc_driver_remove(struct device *dev)
+static void __exit parisc_driver_remove(struct device *dev)
 {
 	struct parisc_device *pa_dev = to_parisc_device(dev);
 	struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);
+
 	if (pa_drv->remove)
 		pa_drv->remove(pa_dev);
-
-	return 0;
 }
 	
 
diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c
index 1a5665875165..cc5774c64fae 100644
--- a/arch/powerpc/platforms/ps3/system-bus.c
+++ b/arch/powerpc/platforms/ps3/system-bus.c
@@ -381,7 +381,7 @@ static int ps3_system_bus_probe(struct device *_dev)
 	return result;
 }
 
-static int ps3_system_bus_remove(struct device *_dev)
+static void ps3_system_bus_remove(struct device *_dev)
 {
 	struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev);
 	struct ps3_system_bus_driver *drv;
@@ -399,7 +399,6 @@ static int ps3_system_bus_remove(struct device *_dev)
 			__func__, __LINE__, drv->core.name);
 
 	pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
-	return 0;
 }
 
 static void ps3_system_bus_shutdown(struct device *_dev)
diff --git a/arch/powerpc/platforms/pseries/ibmebus.c b/arch/powerpc/platforms/pseries/ibmebus.c
index c6c79ef55e13..7ee3ed7d6cc2 100644
--- a/arch/powerpc/platforms/pseries/ibmebus.c
+++ b/arch/powerpc/platforms/pseries/ibmebus.c
@@ -366,14 +366,13 @@ static int ibmebus_bus_device_probe(struct device *dev)
 	return error;
 }
 
-static int ibmebus_bus_device_remove(struct device *dev)
+static void ibmebus_bus_device_remove(struct device *dev)
 {
 	struct platform_device *of_dev = to_platform_device(dev);
 	struct platform_driver *drv = to_platform_driver(dev->driver);
 
 	if (dev->driver && drv->remove)
 		drv->remove(of_dev);
-	return 0;
 }
 
 static void ibmebus_bus_device_shutdown(struct device *dev)
diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c
index e00f3725ec96..58283cecbd52 100644
--- a/arch/powerpc/platforms/pseries/vio.c
+++ b/arch/powerpc/platforms/pseries/vio.c
@@ -1257,7 +1257,7 @@ static int vio_bus_probe(struct device *dev)
 }
 
 /* convert from struct device to struct vio_dev and pass to driver. */
-static int vio_bus_remove(struct device *dev)
+static void vio_bus_remove(struct device *dev)
 {
 	struct vio_dev *viodev = to_vio_dev(dev);
 	struct vio_driver *viodrv = to_vio_driver(dev->driver);
@@ -1276,7 +1276,6 @@ static int vio_bus_remove(struct device *dev)
 		vio_cmo_bus_remove(viodev);
 
 	put_device(devptr);
-	return 0;
 }
 
 static void vio_bus_shutdown(struct device *dev)
diff --git a/arch/s390/include/asm/eadm.h b/arch/s390/include/asm/eadm.h
index bb63b2afdf6f..445fe4c8184a 100644
--- a/arch/s390/include/asm/eadm.h
+++ b/arch/s390/include/asm/eadm.h
@@ -105,7 +105,7 @@ enum scm_event {SCM_CHANGE, SCM_AVAIL};
 struct scm_driver {
 	struct device_driver drv;
 	int (*probe) (struct scm_device *scmdev);
-	int (*remove) (struct scm_device *scmdev);
+	void (*remove) (struct scm_device *scmdev);
 	void (*notify) (struct scm_device *scmdev, enum scm_event event);
 	void (*handler) (struct scm_device *scmdev, void *data,
 			blk_status_t error);
diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c
index 348a88691219..01122a208f94 100644
--- a/arch/sparc/kernel/vio.c
+++ b/arch/sparc/kernel/vio.c
@@ -93,7 +93,7 @@ static int vio_device_probe(struct device *dev)
 	return drv->probe(vdev, id);
 }
 
-static int vio_device_remove(struct device *dev)
+static void vio_device_remove(struct device *dev)
 {
 	struct vio_dev *vdev = to_vio_dev(dev);
 	struct vio_driver *drv = to_vio_driver(dev->driver);
@@ -107,8 +107,6 @@ static int vio_device_remove(struct device *dev)
 
 		drv->remove(vdev);
 	}
-
-	return 0;
 }
 
 static ssize_t devspec_show(struct device *dev,
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 3abb4373d11b..fa923a929224 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1019,7 +1019,7 @@ static int acpi_device_probe(struct device *dev)
 	return 0;
 }
 
-static int acpi_device_remove(struct device *dev)
+static void acpi_device_remove(struct device *dev)
 {
 	struct acpi_device *acpi_dev = to_acpi_device(dev);
 	struct acpi_driver *acpi_drv = acpi_dev->driver;
@@ -1034,7 +1034,6 @@ static int acpi_device_remove(struct device *dev)
 	acpi_dev->driver_data = NULL;
 
 	put_device(dev);
-	return 0;
 }
 
 struct bus_type acpi_bus_type = {
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 939ca220bf78..962041148482 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -219,7 +219,7 @@ static int amba_probe(struct device *dev)
 	return ret;
 }
 
-static int amba_remove(struct device *dev)
+static void amba_remove(struct device *dev)
 {
 	struct amba_device *pcdev = to_amba_device(dev);
 	struct amba_driver *drv = to_amba_driver(dev->driver);
@@ -236,8 +236,6 @@ static int amba_remove(struct device *dev)
 
 	amba_put_disable_pclk(pcdev);
 	dev_pm_domain_detach(dev, true);
-
-	return 0;
 }
 
 static void amba_shutdown(struct device *dev)
diff --git a/drivers/base/auxiliary.c b/drivers/base/auxiliary.c
index 6a30264ab2ba..9230c9472bb0 100644
--- a/drivers/base/auxiliary.c
+++ b/drivers/base/auxiliary.c
@@ -79,7 +79,7 @@ static int auxiliary_bus_probe(struct device *dev)
 	return ret;
 }
 
-static int auxiliary_bus_remove(struct device *dev)
+static void auxiliary_bus_remove(struct device *dev)
 {
 	struct auxiliary_driver *auxdrv = to_auxiliary_drv(dev->driver);
 	struct auxiliary_device *auxdev = to_auxiliary_dev(dev);
@@ -87,8 +87,6 @@ static int auxiliary_bus_remove(struct device *dev)
 	if (auxdrv->remove)
 		auxdrv->remove(auxdev);
 	dev_pm_domain_detach(dev, true);
-
-	return 0;
 }
 
 static void auxiliary_bus_shutdown(struct device *dev)
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 1f6b4bd61056..bdc98c5713d5 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -195,7 +195,7 @@ static ssize_t unbind_store(struct device_driver *drv, const char *buf,
 	bus_put(bus);
 	return err;
 }
-static DRIVER_ATTR_IGNORE_LOCKDEP(unbind, S_IWUSR, NULL, unbind_store);
+static DRIVER_ATTR_IGNORE_LOCKDEP(unbind, 0200, NULL, unbind_store);
 
 /*
  * Manually attach a device to a driver.
@@ -221,7 +221,7 @@ static ssize_t bind_store(struct device_driver *drv, const char *buf,
 	bus_put(bus);
 	return err;
 }
-static DRIVER_ATTR_IGNORE_LOCKDEP(bind, S_IWUSR, NULL, bind_store);
+static DRIVER_ATTR_IGNORE_LOCKDEP(bind, 0200, NULL, bind_store);
 
 static ssize_t drivers_autoprobe_show(struct bus_type *bus, char *buf)
 {
@@ -767,7 +767,7 @@ static ssize_t bus_uevent_store(struct bus_type *bus,
  * DEVICE_ATTR_WO(uevent), which would cause a clash with the with the store
  * function name.
  */
-static struct bus_attribute bus_attr_uevent = __ATTR(uevent, S_IWUSR, NULL,
+static struct bus_attribute bus_attr_uevent = __ATTR(uevent, 0200, NULL,
 						     bus_uevent_store);
 
 /**
diff --git a/drivers/base/cacheinfo.c b/drivers/base/cacheinfo.c
index bfc095956dd1..dad296229161 100644
--- a/drivers/base/cacheinfo.c
+++ b/drivers/base/cacheinfo.c
@@ -297,6 +297,7 @@ static void free_cache_attributes(unsigned int cpu)
 
 	kfree(per_cpu_cacheinfo(cpu));
 	per_cpu_cacheinfo(cpu) = NULL;
+	cache_leaves(cpu) = 0;
 }
 
 int __weak init_cache_level(unsigned int cpu)
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 5ef14db97904..5fc258073bc7 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -388,7 +388,7 @@ int register_cpu(struct cpu *cpu, int num)
 	return 0;
 }
 
-struct device *get_cpu_device(unsigned cpu)
+struct device *get_cpu_device(unsigned int cpu)
 {
 	if (cpu < nr_cpu_ids && cpu_possible(cpu))
 		return per_cpu(cpu_sys_devices, cpu);
@@ -484,7 +484,7 @@ static const struct attribute_group *cpu_root_attr_groups[] = {
 	NULL,
 };
 
-bool cpu_is_hotpluggable(unsigned cpu)
+bool cpu_is_hotpluggable(unsigned int cpu)
 {
 	struct device *dev = get_cpu_device(cpu);
 	return dev && container_of(dev, struct cpu, dev)->hotpluggable;
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 437cd61343b2..68ea1f949daa 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -580,7 +580,8 @@ re_probe:
 			goto probe_failed;
 	}
 
-	if (driver_sysfs_add(dev)) {
+	ret = driver_sysfs_add(dev);
+	if (ret) {
 		pr_err("%s: driver_sysfs_add(%s) failed\n",
 		       __func__, dev_name(dev));
 		goto probe_failed;
@@ -602,15 +603,18 @@ re_probe:
 		goto probe_failed;
 	}
 
-	if (device_add_groups(dev, drv->dev_groups)) {
+	ret = device_add_groups(dev, drv->dev_groups);
+	if (ret) {
 		dev_err(dev, "device_add_groups() failed\n");
 		goto dev_groups_failed;
 	}
 
-	if (dev_has_sync_state(dev) &&
-	    device_create_file(dev, &dev_attr_state_synced)) {
-		dev_err(dev, "state_synced sysfs add failed\n");
-		goto dev_sysfs_state_synced_failed;
+	if (dev_has_sync_state(dev)) {
+		ret = device_create_file(dev, &dev_attr_state_synced);
+		if (ret) {
+			dev_err(dev, "state_synced sysfs add failed\n");
+			goto dev_sysfs_state_synced_failed;
+		}
 	}
 
 	if (test_remove) {
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 68c549d71230..bdbedc6660a8 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -165,7 +165,7 @@ static inline int fw_state_wait(struct fw_priv *fw_priv)
 	return __fw_state_wait_common(fw_priv, MAX_SCHEDULE_TIMEOUT);
 }
 
-static int fw_cache_piggyback_on_request(const char *name);
+static void fw_cache_piggyback_on_request(struct fw_priv *fw_priv);
 
 static struct fw_priv *__allocate_fw_priv(const char *fw_name,
 					  struct firmware_cache *fwc,
@@ -707,10 +707,8 @@ int assign_fw(struct firmware *fw, struct device *device)
 	 * on request firmware.
 	 */
 	if (!(fw_priv->opt_flags & FW_OPT_NOCACHE) &&
-	    fw_priv->fwc->state == FW_LOADER_START_CACHE) {
-		if (fw_cache_piggyback_on_request(fw_priv->fw_name))
-			kref_get(&fw_priv->ref);
-	}
+	    fw_priv->fwc->state == FW_LOADER_START_CACHE)
+		fw_cache_piggyback_on_request(fw_priv);
 
 	/* pass the pages buffer to driver at the last minute */
 	fw_set_page_data(fw_priv, fw);
@@ -1259,11 +1257,11 @@ static int __fw_entry_found(const char *name)
 	return 0;
 }
 
-static int fw_cache_piggyback_on_request(const char *name)
+static void fw_cache_piggyback_on_request(struct fw_priv *fw_priv)
 {
-	struct firmware_cache *fwc = &fw_cache;
+	const char *name = fw_priv->fw_name;
+	struct firmware_cache *fwc = fw_priv->fwc;
 	struct fw_cache_entry *fce;
-	int ret = 0;
 
 	spin_lock(&fwc->name_lock);
 	if (__fw_entry_found(name))
@@ -1271,13 +1269,12 @@ static int fw_cache_piggyback_on_request(const char *name)
 
 	fce = alloc_fw_cache_entry(name);
 	if (fce) {
-		ret = 1;
 		list_add(&fce->list, &fwc->fw_names);
+		kref_get(&fw_priv->ref);
 		pr_debug("%s: fw: %s\n", __func__, name);
 	}
 found:
 	spin_unlock(&fwc->name_lock);
-	return ret;
 }
 
 static void free_fw_cache_entry(struct fw_cache_entry *fce)
@@ -1508,9 +1505,8 @@ static inline void unregister_fw_pm_ops(void)
 	unregister_pm_notifier(&fw_cache.pm_notify);
 }
 #else
-static int fw_cache_piggyback_on_request(const char *name)
+static void fw_cache_piggyback_on_request(struct fw_priv *fw_priv)
 {
-	return 0;
 }
 static inline int register_fw_pm_ops(void)
 {
diff --git a/drivers/base/isa.c b/drivers/base/isa.c
index aa4737667026..55e3ee2da98f 100644
--- a/drivers/base/isa.c
+++ b/drivers/base/isa.c
@@ -46,14 +46,12 @@ static int isa_bus_probe(struct device *dev)
 	return 0;
 }
 
-static int isa_bus_remove(struct device *dev)
+static void isa_bus_remove(struct device *dev)
 {
 	struct isa_driver *isa_driver = dev->platform_data;
 
 	if (isa_driver && isa_driver->remove)
 		isa_driver->remove(dev, to_isa_dev(dev)->id);
-
-	return 0;
 }
 
 static void isa_bus_shutdown(struct device *dev)
diff --git a/drivers/base/map.c b/drivers/base/map.c
index 5650ab2b247a..83aeb09ca161 100644
--- a/drivers/base/map.c
+++ b/drivers/base/map.c
@@ -33,9 +33,9 @@ int kobj_map(struct kobj_map *domain, dev_t dev, unsigned long range,
 	     struct module *module, kobj_probe_t *probe,
 	     int (*lock)(dev_t, void *), void *data)
 {
-	unsigned n = MAJOR(dev + range - 1) - MAJOR(dev) + 1;
-	unsigned index = MAJOR(dev);
-	unsigned i;
+	unsigned int n = MAJOR(dev + range - 1) - MAJOR(dev) + 1;
+	unsigned int index = MAJOR(dev);
+	unsigned int i;
 	struct probe *p;
 
 	if (n > 255)
@@ -67,9 +67,9 @@ int kobj_map(struct kobj_map *domain, dev_t dev, unsigned long range,
 
 void kobj_unmap(struct kobj_map *domain, dev_t dev, unsigned long range)
 {
-	unsigned n = MAJOR(dev + range - 1) - MAJOR(dev) + 1;
-	unsigned index = MAJOR(dev);
-	unsigned i;
+	unsigned int n = MAJOR(dev + range - 1) - MAJOR(dev) + 1;
+	unsigned int index = MAJOR(dev);
+	unsigned int i;
 	struct probe *found = NULL;
 
 	if (n > 255)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 4a4ae868ad9f..be16bbff11cc 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -26,43 +26,47 @@ static struct bus_type node_subsys = {
 	.dev_name = "node",
 };
 
-
-static ssize_t node_read_cpumap(struct device *dev, bool list, char *buf)
+static inline ssize_t cpumap_read(struct file *file, struct kobject *kobj,
+				  struct bin_attribute *attr, char *buf,
+				  loff_t off, size_t count)
 {
-	ssize_t n;
-	cpumask_var_t mask;
+	struct device *dev = kobj_to_dev(kobj);
 	struct node *node_dev = to_node(dev);
-
-	/* 2008/04/07: buf currently PAGE_SIZE, need 9 chars per 32 bits. */
-	BUILD_BUG_ON((NR_CPUS/32 * 9) > (PAGE_SIZE-1));
+	cpumask_var_t mask;
+	ssize_t n;
 
 	if (!alloc_cpumask_var(&mask, GFP_KERNEL))
 		return 0;
 
 	cpumask_and(mask, cpumask_of_node(node_dev->dev.id), cpu_online_mask);
-	n = cpumap_print_to_pagebuf(list, buf, mask);
+	n = cpumap_print_bitmask_to_buf(buf, mask, off, count);
 	free_cpumask_var(mask);
 
 	return n;
 }
 
-static inline ssize_t cpumap_show(struct device *dev,
-				  struct device_attribute *attr,
-				  char *buf)
+static BIN_ATTR_RO(cpumap, 0);
+
+static inline ssize_t cpulist_read(struct file *file, struct kobject *kobj,
+				   struct bin_attribute *attr, char *buf,
+				   loff_t off, size_t count)
 {
-	return node_read_cpumap(dev, false, buf);
-}
+	struct device *dev = kobj_to_dev(kobj);
+	struct node *node_dev = to_node(dev);
+	cpumask_var_t mask;
+	ssize_t n;
+
+	if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+		return 0;
 
-static DEVICE_ATTR_RO(cpumap);
+	cpumask_and(mask, cpumask_of_node(node_dev->dev.id), cpu_online_mask);
+	n = cpumap_print_list_to_buf(buf, mask, off, count);
+	free_cpumask_var(mask);
 
-static inline ssize_t cpulist_show(struct device *dev,
-				   struct device_attribute *attr,
-				   char *buf)
-{
-	return node_read_cpumap(dev, true, buf);
+	return n;
 }
 
-static DEVICE_ATTR_RO(cpulist);
+static BIN_ATTR_RO(cpulist, 0);
 
 /**
  * struct node_access_nodes - Access class device to hold user visible
@@ -75,7 +79,7 @@ static DEVICE_ATTR_RO(cpulist);
 struct node_access_nodes {
 	struct device		dev;
 	struct list_head	list_node;
-	unsigned		access;
+	unsigned int		access;
 #ifdef CONFIG_HMEM_REPORTING
 	struct node_hmem_attrs	hmem_attrs;
 #endif
@@ -122,7 +126,7 @@ static void node_access_release(struct device *dev)
 }
 
 static struct node_access_nodes *node_init_node_access(struct node *node,
-						       unsigned access)
+						       unsigned int access)
 {
 	struct node_access_nodes *access_node;
 	struct device *dev;
@@ -187,7 +191,7 @@ static struct attribute *access_attrs[] = {
  * @access: The access class the for the given attributes
  */
 void node_set_perf_attrs(unsigned int nid, struct node_hmem_attrs *hmem_attrs,
-			 unsigned access)
+			 unsigned int access)
 {
 	struct node_access_nodes *c;
 	struct node *node;
@@ -557,15 +561,28 @@ static ssize_t node_read_distance(struct device *dev,
 static DEVICE_ATTR(distance, 0444, node_read_distance, NULL);
 
 static struct attribute *node_dev_attrs[] = {
-	&dev_attr_cpumap.attr,
-	&dev_attr_cpulist.attr,
 	&dev_attr_meminfo.attr,
 	&dev_attr_numastat.attr,
 	&dev_attr_distance.attr,
 	&dev_attr_vmstat.attr,
 	NULL
 };
-ATTRIBUTE_GROUPS(node_dev);
+
+static struct bin_attribute *node_dev_bin_attrs[] = {
+	&bin_attr_cpumap,
+	&bin_attr_cpulist,
+	NULL
+};
+
+static const struct attribute_group node_dev_group = {
+	.attrs = node_dev_attrs,
+	.bin_attrs = node_dev_bin_attrs
+};
+
+static const struct attribute_group *node_dev_groups[] = {
+	&node_dev_group,
+	NULL
+};
 
 #ifdef CONFIG_HUGETLBFS
 /*
@@ -711,7 +728,7 @@ int register_cpu_under_node(unsigned int cpu, unsigned int nid)
  */
 int register_memory_node_under_compute_node(unsigned int mem_nid,
 					    unsigned int cpu_nid,
-					    unsigned access)
+					    unsigned int access)
 {
 	struct node *init_node, *targ_node;
 	struct node_access_nodes *initiator, *target;
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 8640578f45e9..652531f67135 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -642,22 +642,6 @@ int platform_device_add_data(struct platform_device *pdev, const void *data,
 EXPORT_SYMBOL_GPL(platform_device_add_data);
 
 /**
- * platform_device_add_properties - add built-in properties to a platform device
- * @pdev: platform device to add properties to
- * @properties: null terminated array of properties to add
- *
- * The function will take deep copy of @properties and attach the copy to the
- * platform device. The memory associated with properties will be freed when the
- * platform device is released.
- */
-int platform_device_add_properties(struct platform_device *pdev,
-				   const struct property_entry *properties)
-{
-	return device_add_properties(&pdev->dev, properties);
-}
-EXPORT_SYMBOL_GPL(platform_device_add_properties);
-
-/**
  * platform_device_add - add a platform device to device hierarchy
  * @pdev: platform device we're adding
  *
@@ -842,8 +826,8 @@ struct platform_device *platform_device_register_full(
 		goto err;
 
 	if (pdevinfo->properties) {
-		ret = platform_device_add_properties(pdev,
-						     pdevinfo->properties);
+		ret = device_create_managed_software_node(&pdev->dev,
+							  pdevinfo->properties, NULL);
 		if (ret)
 			goto err;
 	}
@@ -1438,7 +1422,7 @@ out:
 	return ret;
 }
 
-static int platform_remove(struct device *_dev)
+static void platform_remove(struct device *_dev)
 {
 	struct platform_driver *drv = to_platform_driver(_dev->driver);
 	struct platform_device *dev = to_platform_device(_dev);
@@ -1450,8 +1434,6 @@ static int platform_remove(struct device *_dev)
 			dev_warn(_dev, "remove callback returned a non-zero value. This will be ignored.\n");
 	}
 	dev_pm_domain_detach(_dev, true);
-
-	return 0;
 }
 
 static void platform_shutdown(struct device *_dev)
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index f0b37c188514..99bda0da23a8 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -1180,7 +1180,7 @@ static const struct file_operations wakeup_sources_stats_fops = {
 
 static int __init wakeup_sources_debugfs_init(void)
 {
-	debugfs_create_file("wakeup_sources", S_IRUGO, NULL, NULL,
+	debugfs_create_file("wakeup_sources", 0444, NULL, NULL,
 			    &wakeup_sources_stats_fops);
 	return 0;
 }
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index 4d254fcc93d1..43c0940643f5 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -21,25 +21,27 @@ static ssize_t name##_show(struct device *dev,				\
 	return sysfs_emit(buf, "%d\n", topology_##name(dev->id));	\
 }
 
-#define define_siblings_show_map(name, mask)				\
-static ssize_t name##_show(struct device *dev,				\
-			   struct device_attribute *attr, char *buf)	\
-{									\
-	return cpumap_print_to_pagebuf(false, buf, topology_##mask(dev->id));\
+#define define_siblings_read_func(name, mask)					\
+static ssize_t name##_read(struct file *file, struct kobject *kobj,		\
+			   struct bin_attribute *attr, char *buf,		\
+			   loff_t off, size_t count)				\
+{										\
+	struct device *dev = kobj_to_dev(kobj);                                 \
+										\
+	return cpumap_print_bitmask_to_buf(buf, topology_##mask(dev->id),	\
+					   off, count);                         \
+}										\
+										\
+static ssize_t name##_list_read(struct file *file, struct kobject *kobj,	\
+				struct bin_attribute *attr, char *buf,		\
+				loff_t off, size_t count)			\
+{										\
+	struct device *dev = kobj_to_dev(kobj);					\
+										\
+	return cpumap_print_list_to_buf(buf, topology_##mask(dev->id),		\
+					off, count);				\
 }
 
-#define define_siblings_show_list(name, mask)				\
-static ssize_t name##_list_show(struct device *dev,			\
-				struct device_attribute *attr,		\
-				char *buf)				\
-{									\
-	return cpumap_print_to_pagebuf(true, buf, topology_##mask(dev->id));\
-}
-
-#define define_siblings_show_func(name, mask)	\
-	define_siblings_show_map(name, mask);	\
-	define_siblings_show_list(name, mask)
-
 define_id_show_func(physical_package_id);
 static DEVICE_ATTR_RO(physical_package_id);
 
@@ -49,71 +51,80 @@ static DEVICE_ATTR_RO(die_id);
 define_id_show_func(core_id);
 static DEVICE_ATTR_RO(core_id);
 
-define_siblings_show_func(thread_siblings, sibling_cpumask);
-static DEVICE_ATTR_RO(thread_siblings);
-static DEVICE_ATTR_RO(thread_siblings_list);
+define_siblings_read_func(thread_siblings, sibling_cpumask);
+static BIN_ATTR_RO(thread_siblings, 0);
+static BIN_ATTR_RO(thread_siblings_list, 0);
 
-define_siblings_show_func(core_cpus, sibling_cpumask);
-static DEVICE_ATTR_RO(core_cpus);
-static DEVICE_ATTR_RO(core_cpus_list);
+define_siblings_read_func(core_cpus, sibling_cpumask);
+static BIN_ATTR_RO(core_cpus, 0);
+static BIN_ATTR_RO(core_cpus_list, 0);
 
-define_siblings_show_func(core_siblings, core_cpumask);
-static DEVICE_ATTR_RO(core_siblings);
-static DEVICE_ATTR_RO(core_siblings_list);
+define_siblings_read_func(core_siblings, core_cpumask);
+static BIN_ATTR_RO(core_siblings, 0);
+static BIN_ATTR_RO(core_siblings_list, 0);
 
-define_siblings_show_func(die_cpus, die_cpumask);
-static DEVICE_ATTR_RO(die_cpus);
-static DEVICE_ATTR_RO(die_cpus_list);
+define_siblings_read_func(die_cpus, die_cpumask);
+static BIN_ATTR_RO(die_cpus, 0);
+static BIN_ATTR_RO(die_cpus_list, 0);
 
-define_siblings_show_func(package_cpus, core_cpumask);
-static DEVICE_ATTR_RO(package_cpus);
-static DEVICE_ATTR_RO(package_cpus_list);
+define_siblings_read_func(package_cpus, core_cpumask);
+static BIN_ATTR_RO(package_cpus, 0);
+static BIN_ATTR_RO(package_cpus_list, 0);
 
 #ifdef CONFIG_SCHED_BOOK
 define_id_show_func(book_id);
 static DEVICE_ATTR_RO(book_id);
-define_siblings_show_func(book_siblings, book_cpumask);
-static DEVICE_ATTR_RO(book_siblings);
-static DEVICE_ATTR_RO(book_siblings_list);
+define_siblings_read_func(book_siblings, book_cpumask);
+static BIN_ATTR_RO(book_siblings, 0);
+static BIN_ATTR_RO(book_siblings_list, 0);
 #endif
 
 #ifdef CONFIG_SCHED_DRAWER
 define_id_show_func(drawer_id);
 static DEVICE_ATTR_RO(drawer_id);
-define_siblings_show_func(drawer_siblings, drawer_cpumask);
-static DEVICE_ATTR_RO(drawer_siblings);
-static DEVICE_ATTR_RO(drawer_siblings_list);
+define_siblings_read_func(drawer_siblings, drawer_cpumask);
+static BIN_ATTR_RO(drawer_siblings, 0);
+static BIN_ATTR_RO(drawer_siblings_list, 0);
 #endif
 
+static struct bin_attribute *bin_attrs[] = {
+	&bin_attr_core_cpus,
+	&bin_attr_core_cpus_list,
+	&bin_attr_thread_siblings,
+	&bin_attr_thread_siblings_list,
+	&bin_attr_core_siblings,
+	&bin_attr_core_siblings_list,
+	&bin_attr_die_cpus,
+	&bin_attr_die_cpus_list,
+	&bin_attr_package_cpus,
+	&bin_attr_package_cpus_list,
+#ifdef CONFIG_SCHED_BOOK
+	&bin_attr_book_siblings,
+	&bin_attr_book_siblings_list,
+#endif
+#ifdef CONFIG_SCHED_DRAWER
+	&bin_attr_drawer_siblings,
+	&bin_attr_drawer_siblings_list,
+#endif
+	NULL
+};
+
 static struct attribute *default_attrs[] = {
 	&dev_attr_physical_package_id.attr,
 	&dev_attr_die_id.attr,
 	&dev_attr_core_id.attr,
-	&dev_attr_thread_siblings.attr,
-	&dev_attr_thread_siblings_list.attr,
-	&dev_attr_core_cpus.attr,
-	&dev_attr_core_cpus_list.attr,
-	&dev_attr_core_siblings.attr,
-	&dev_attr_core_siblings_list.attr,
-	&dev_attr_die_cpus.attr,
-	&dev_attr_die_cpus_list.attr,
-	&dev_attr_package_cpus.attr,
-	&dev_attr_package_cpus_list.attr,
 #ifdef CONFIG_SCHED_BOOK
 	&dev_attr_book_id.attr,
-	&dev_attr_book_siblings.attr,
-	&dev_attr_book_siblings_list.attr,
 #endif
 #ifdef CONFIG_SCHED_DRAWER
 	&dev_attr_drawer_id.attr,
-	&dev_attr_drawer_siblings.attr,
-	&dev_attr_drawer_siblings_list.attr,
 #endif
 	NULL
 };
 
 static const struct attribute_group topology_attr_group = {
 	.attrs = default_attrs,
+	.bin_attrs = bin_attrs,
 	.name = "topology"
 };
 
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 1df2b5801c3b..c6d6ba0d00b1 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -27,7 +27,7 @@ static DEFINE_MUTEX(bcma_buses_mutex);
 
 static int bcma_bus_match(struct device *dev, struct device_driver *drv);
 static int bcma_device_probe(struct device *dev);
-static int bcma_device_remove(struct device *dev);
+static void bcma_device_remove(struct device *dev);
 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env);
 
 static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
@@ -614,7 +614,7 @@ static int bcma_device_probe(struct device *dev)
 	return err;
 }
 
-static int bcma_device_remove(struct device *dev)
+static void bcma_device_remove(struct device *dev)
 {
 	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
 	struct bcma_driver *adrv = container_of(dev->driver, struct bcma_driver,
@@ -623,8 +623,6 @@ static int bcma_device_remove(struct device *dev)
 	if (adrv->remove)
 		adrv->remove(core);
 	put_device(dev);
-
-	return 0;
 }
 
 static int bcma_device_uevent(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c
index d46db132d085..6f225dddc74f 100644
--- a/drivers/bus/sunxi-rsb.c
+++ b/drivers/bus/sunxi-rsb.c
@@ -169,13 +169,11 @@ static int sunxi_rsb_device_probe(struct device *dev)
 	return drv->probe(rdev);
 }
 
-static int sunxi_rsb_device_remove(struct device *dev)
+static void sunxi_rsb_device_remove(struct device *dev)
 {
 	const struct sunxi_rsb_driver *drv = to_sunxi_rsb_driver(dev->driver);
 
 	drv->remove(to_sunxi_rsb_device(dev));
-
-	return 0;
 }
 
 static struct bus_type sunxi_rsb_bus = {
diff --git a/drivers/cxl/core.c b/drivers/cxl/core.c
index a2e4d54fc7bc..2b90b7c3b9d7 100644
--- a/drivers/cxl/core.c
+++ b/drivers/cxl/core.c
@@ -1034,13 +1034,12 @@ static int cxl_bus_probe(struct device *dev)
 	return to_cxl_drv(dev->driver)->probe(dev);
 }
 
-static int cxl_bus_remove(struct device *dev)
+static void cxl_bus_remove(struct device *dev)
 {
 	struct cxl_driver *cxl_drv = to_cxl_drv(dev->driver);
 
 	if (cxl_drv->remove)
 		cxl_drv->remove(dev);
-	return 0;
 }
 
 struct bus_type cxl_bus_type = {
diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 5aee26e1bbd6..6cc4da4c713d 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -172,15 +172,13 @@ static int dax_bus_probe(struct device *dev)
 	return 0;
 }
 
-static int dax_bus_remove(struct device *dev)
+static void dax_bus_remove(struct device *dev)
 {
 	struct dax_device_driver *dax_drv = to_dax_drv(dev->driver);
 	struct dev_dax *dev_dax = to_dev_dax(dev);
 
 	if (dax_drv->remove)
 		dax_drv->remove(dev_dax);
-
-	return 0;
 }
 
 static struct bus_type dax_bus_type = {
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index bb4df63906a7..26d8ff97d13d 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -260,7 +260,7 @@ static void disable_wq(struct idxd_wq *wq)
 	dev_info(dev, "wq %s disabled\n", dev_name(&wq->conf_dev));
 }
 
-static int idxd_config_bus_remove(struct device *dev)
+static void idxd_config_bus_remove(struct device *dev)
 {
 	int rc;
 
@@ -305,8 +305,6 @@ static int idxd_config_bus_remove(struct device *dev)
 			dev_info(dev, "Device %s disabled\n", dev_name(dev));
 
 	}
-
-	return 0;
 }
 
 static void idxd_config_bus_shutdown(struct device *dev)
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 68216988391f..90ed8fdaba75 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -187,14 +187,12 @@ static int fw_unit_probe(struct device *dev)
 	return driver->probe(fw_unit(dev), unit_match(dev, dev->driver));
 }
 
-static int fw_unit_remove(struct device *dev)
+static void fw_unit_remove(struct device *dev)
 {
 	struct fw_driver *driver =
 			container_of(dev->driver, struct fw_driver, driver);
 
 	driver->remove(fw_unit(dev));
-
-	return 0;
 }
 
 static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size)
diff --git a/drivers/firmware/arm_scmi/bus.c b/drivers/firmware/arm_scmi/bus.c
index 6c7e24935eca..f6fe723ab869 100644
--- a/drivers/firmware/arm_scmi/bus.c
+++ b/drivers/firmware/arm_scmi/bus.c
@@ -111,15 +111,13 @@ static int scmi_dev_probe(struct device *dev)
 	return scmi_drv->probe(scmi_dev);
 }
 
-static int scmi_dev_remove(struct device *dev)
+static void scmi_dev_remove(struct device *dev)
 {
 	struct scmi_driver *scmi_drv = to_scmi_driver(dev->driver);
 	struct scmi_device *scmi_dev = to_scmi_dev(dev);
 
 	if (scmi_drv->remove)
 		scmi_drv->remove(scmi_dev);
-
-	return 0;
 }
 
 static struct bus_type scmi_bus_type = {
diff --git a/drivers/firmware/google/coreboot_table.c b/drivers/firmware/google/coreboot_table.c
index dc83ea118c67..c52bcaa9def6 100644
--- a/drivers/firmware/google/coreboot_table.c
+++ b/drivers/firmware/google/coreboot_table.c
@@ -44,15 +44,13 @@ static int coreboot_bus_probe(struct device *dev)
 	return ret;
 }
 
-static int coreboot_bus_remove(struct device *dev)
+static void coreboot_bus_remove(struct device *dev)
 {
 	struct coreboot_device *device = CB_DEV(dev);
 	struct coreboot_driver *driver = CB_DRV(dev->driver);
 
 	if (driver->remove)
 		driver->remove(device);
-
-	return 0;
 }
 
 static struct bus_type coreboot_bus_type = {
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index e73a70053906..c99b78ee008a 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -284,15 +284,13 @@ static int dfl_bus_probe(struct device *dev)
 	return ddrv->probe(ddev);
 }
 
-static int dfl_bus_remove(struct device *dev)
+static void dfl_bus_remove(struct device *dev)
 {
 	struct dfl_driver *ddrv = to_dfl_drv(dev->driver);
 	struct dfl_device *ddev = to_dfl_dev(dev);
 
 	if (ddrv->remove)
 		ddrv->remove(ddev);
-
-	return 0;
 }
 
 static int dfl_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 7db332139f7d..dbed2524fd47 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2302,7 +2302,7 @@ end:
 	return ret;
 }
 
-static int hid_device_remove(struct device *dev)
+static void hid_device_remove(struct device *dev)
 {
 	struct hid_device *hdev = to_hid_device(dev);
 	struct hid_driver *hdrv;
@@ -2322,8 +2322,6 @@ static int hid_device_remove(struct device *dev)
 
 	if (!hdev->io_started)
 		up(&hdev->driver_input_lock);
-
-	return 0;
 }
 
 static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
diff --git a/drivers/hid/intel-ish-hid/ishtp/bus.c b/drivers/hid/intel-ish-hid/ishtp/bus.c
index aa2c51624012..334eac611774 100644
--- a/drivers/hid/intel-ish-hid/ishtp/bus.c
+++ b/drivers/hid/intel-ish-hid/ishtp/bus.c
@@ -255,7 +255,7 @@ static int ishtp_cl_bus_match(struct device *dev, struct device_driver *drv)
  *
  * Return: Return value from driver remove() call.
  */
-static int ishtp_cl_device_remove(struct device *dev)
+static void ishtp_cl_device_remove(struct device *dev)
 {
 	struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
 	struct ishtp_cl_driver *driver = to_ishtp_cl_driver(dev->driver);
@@ -267,8 +267,6 @@ static int ishtp_cl_device_remove(struct device *dev)
 
 	if (driver->remove)
 		driver->remove(device);
-
-	return 0;
 }
 
 /**
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 57bbbaa4e8f7..392c1ac4f819 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -922,7 +922,7 @@ static int vmbus_probe(struct device *child_device)
 /*
  * vmbus_remove - Remove a vmbus device
  */
-static int vmbus_remove(struct device *child_device)
+static void vmbus_remove(struct device *child_device)
 {
 	struct hv_driver *drv;
 	struct hv_device *dev = device_to_hv_device(child_device);
@@ -932,11 +932,8 @@ static int vmbus_remove(struct device *child_device)
 		if (drv->remove)
 			drv->remove(dev);
 	}
-
-	return 0;
 }
 
-
 /*
  * vmbus_shutdown - Shutdown a vmbus device
  */
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index 66eed2dff818..7e753a75d23b 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -95,7 +95,7 @@ out_pm:
 
 static void intel_th_device_remove(struct intel_th_device *thdev);
 
-static int intel_th_remove(struct device *dev)
+static void intel_th_remove(struct device *dev)
 {
 	struct intel_th_driver *thdrv = to_intel_th_driver(dev->driver);
 	struct intel_th_device *thdev = to_intel_th_device(dev);
@@ -164,8 +164,6 @@ static int intel_th_remove(struct device *dev)
 	pm_runtime_disable(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
-
-	return 0;
 }
 
 static struct bus_type intel_th_bus = {
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 84f12bf90644..54964fbe3f03 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -601,7 +601,7 @@ put_sync_adapter:
 	return status;
 }
 
-static int i2c_device_remove(struct device *dev)
+static void i2c_device_remove(struct device *dev)
 {
 	struct i2c_client	*client = to_i2c_client(dev);
 	struct i2c_adapter      *adap;
@@ -631,9 +631,6 @@ static int i2c_device_remove(struct device *dev)
 	client->irq = 0;
 	if (client->flags & I2C_CLIENT_HOST_NOTIFY)
 		pm_runtime_put(&client->adapter->dev);
-
-	/* return always 0 because there is WIP to make remove-functions void */
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index e2e12a5585e5..c3b4c677b442 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -322,7 +322,7 @@ static int i3c_device_probe(struct device *dev)
 	return driver->probe(i3cdev);
 }
 
-static int i3c_device_remove(struct device *dev)
+static void i3c_device_remove(struct device *dev)
 {
 	struct i3c_device *i3cdev = dev_to_i3cdev(dev);
 	struct i3c_driver *driver = drv_to_i3cdrv(dev->driver);
@@ -331,8 +331,6 @@ static int i3c_device_remove(struct device *dev)
 		driver->remove(i3cdev);
 
 	i3c_device_free_ibi(i3cdev);
-
-	return 0;
 }
 
 struct bus_type i3c_bus_type = {
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index 61fa7e724172..db58a01b23d3 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -697,13 +697,12 @@ static int gameport_driver_probe(struct device *dev)
 	return gameport->drv ? 0 : -ENODEV;
 }
 
-static int gameport_driver_remove(struct device *dev)
+static void gameport_driver_remove(struct device *dev)
 {
 	struct gameport *gameport = to_gameport_port(dev);
 	struct gameport_driver *drv = to_gameport_driver(dev->driver);
 
 	drv->disconnect(gameport);
-	return 0;
 }
 
 static void gameport_attach_driver(struct gameport_driver *drv)
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index 29f491082926..ec117be3d8d8 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -778,12 +778,11 @@ static int serio_driver_probe(struct device *dev)
 	return serio_connect_driver(serio, drv);
 }
 
-static int serio_driver_remove(struct device *dev)
+static void serio_driver_remove(struct device *dev)
 {
 	struct serio *serio = to_serio_port(dev);
 
 	serio_disconnect_driver(serio);
-	return 0;
 }
 
 static void serio_cleanup(struct serio *serio)
diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c
index 7de9605cac4f..b1c3198355e7 100644
--- a/drivers/ipack/ipack.c
+++ b/drivers/ipack/ipack.c
@@ -67,15 +67,13 @@ static int ipack_bus_probe(struct device *device)
 	return drv->ops->probe(dev);
 }
 
-static int ipack_bus_remove(struct device *device)
+static void ipack_bus_remove(struct device *device)
 {
 	struct ipack_device *dev = to_ipack_dev(device);
 	struct ipack_driver *drv = to_ipack_driver(device->driver);
 
 	if (drv->ops->remove)
 		drv->ops->remove(dev);
-
-	return 0;
 }
 
 static int ipack_uevent(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index 49af60bdac92..c1fdf2896021 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -88,7 +88,7 @@ static int macio_device_probe(struct device *dev)
 	return error;
 }
 
-static int macio_device_remove(struct device *dev)
+static void macio_device_remove(struct device *dev)
 {
 	struct macio_dev * macio_dev = to_macio_device(dev);
 	struct macio_driver * drv = to_macio_driver(dev->driver);
@@ -96,8 +96,6 @@ static int macio_device_remove(struct device *dev)
 	if (dev->driver && drv->remove)
 		drv->remove(macio_dev);
 	macio_dev_put(macio_dev);
-
-	return 0;
 }
 
 static void macio_device_shutdown(struct device *dev)
diff --git a/drivers/mcb/mcb-core.c b/drivers/mcb/mcb-core.c
index 38fbb3b59873..edf4ee6eff25 100644
--- a/drivers/mcb/mcb-core.c
+++ b/drivers/mcb/mcb-core.c
@@ -77,7 +77,7 @@ static int mcb_probe(struct device *dev)
 	return ret;
 }
 
-static int mcb_remove(struct device *dev)
+static void mcb_remove(struct device *dev)
 {
 	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);
 	struct mcb_device *mdev = to_mcb_device(dev);
@@ -89,8 +89,6 @@ static int mcb_remove(struct device *dev)
 	module_put(carrier_mod);
 
 	put_device(&mdev->dev);
-
-	return 0;
 }
 
 static void mcb_shutdown(struct device *dev)
diff --git a/drivers/media/pci/bt8xx/bttv-gpio.c b/drivers/media/pci/bt8xx/bttv-gpio.c
index b730225ca887..a2b18e2bed1b 100644
--- a/drivers/media/pci/bt8xx/bttv-gpio.c
+++ b/drivers/media/pci/bt8xx/bttv-gpio.c
@@ -46,14 +46,13 @@ static int bttv_sub_probe(struct device *dev)
 	return sub->probe ? sub->probe(sdev) : -ENODEV;
 }
 
-static int bttv_sub_remove(struct device *dev)
+static void bttv_sub_remove(struct device *dev)
 {
 	struct bttv_sub_device *sdev = to_bttv_sub_dev(dev);
 	struct bttv_sub_driver *sub = to_bttv_sub_drv(dev->driver);
 
 	if (sub->remove)
 		sub->remove(sdev);
-	return 0;
 }
 
 struct bus_type bttv_sub_bus_type = {
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c
index bb1065990aeb..660df7d269fa 100644
--- a/drivers/memstick/core/memstick.c
+++ b/drivers/memstick/core/memstick.c
@@ -91,7 +91,7 @@ static int memstick_device_probe(struct device *dev)
 	return rc;
 }
 
-static int memstick_device_remove(struct device *dev)
+static void memstick_device_remove(struct device *dev)
 {
 	struct memstick_dev *card = container_of(dev, struct memstick_dev,
 						  dev);
@@ -105,7 +105,6 @@ static int memstick_device_remove(struct device *dev)
 	}
 
 	put_device(dev);
-	return 0;
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/mfd/mcp-core.c b/drivers/mfd/mcp-core.c
index eff9423e90f5..2fa592c37c6f 100644
--- a/drivers/mfd/mcp-core.c
+++ b/drivers/mfd/mcp-core.c
@@ -33,13 +33,12 @@ static int mcp_bus_probe(struct device *dev)
 	return drv->probe(mcp);
 }
 
-static int mcp_bus_remove(struct device *dev)
+static void mcp_bus_remove(struct device *dev)
 {
 	struct mcp *mcp = to_mcp(dev);
 	struct mcp_driver *drv = to_mcp_driver(dev->driver);
 
 	drv->remove(mcp);
-	return 0;
 }
 
 static struct bus_type mcp_bus_type = {
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 09188d9afc06..44bac4ad687c 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -884,7 +884,7 @@ static int mei_cl_device_probe(struct device *dev)
  *
  * Return:  0 on success; < 0 otherwise
  */
-static int mei_cl_device_remove(struct device *dev)
+static void mei_cl_device_remove(struct device *dev)
 {
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	struct mei_cl_driver *cldrv = to_mei_cl_driver(dev->driver);
@@ -896,8 +896,6 @@ static int mei_cl_device_remove(struct device *dev)
 
 	mei_cl_bus_module_put(cldev);
 	module_put(THIS_MODULE);
-
-	return 0;
 }
 
 static ssize_t name_show(struct device *dev, struct device_attribute *a,
diff --git a/drivers/misc/tifm_core.c b/drivers/misc/tifm_core.c
index 667e574a7df2..52656fc87e99 100644
--- a/drivers/misc/tifm_core.c
+++ b/drivers/misc/tifm_core.c
@@ -87,7 +87,7 @@ static void tifm_dummy_event(struct tifm_dev *sock)
 	return;
 }
 
-static int tifm_device_remove(struct device *dev)
+static void tifm_device_remove(struct device *dev)
 {
 	struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
 	struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
@@ -101,7 +101,6 @@ static int tifm_device_remove(struct device *dev)
 	}
 
 	put_device(dev);
-	return 0;
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 4383c262b3f5..f6b7a9c5bbff 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -140,14 +140,12 @@ static int mmc_bus_probe(struct device *dev)
 	return drv->probe(card);
 }
 
-static int mmc_bus_remove(struct device *dev)
+static void mmc_bus_remove(struct device *dev)
 {
 	struct mmc_driver *drv = to_mmc_driver(dev->driver);
 	struct mmc_card *card = mmc_dev_to_card(dev);
 
 	drv->remove(card);
-
-	return 0;
 }
 
 static void mmc_bus_shutdown(struct device *dev)
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 3d709029e07c..fda03b35c14a 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -203,7 +203,7 @@ disable_runtimepm:
 	return ret;
 }
 
-static int sdio_bus_remove(struct device *dev)
+static void sdio_bus_remove(struct device *dev)
 {
 	struct sdio_driver *drv = to_sdio_driver(dev->driver);
 	struct sdio_func *func = dev_to_sdio_func(dev);
@@ -232,8 +232,6 @@ static int sdio_bus_remove(struct device *dev)
 		pm_runtime_put_sync(dev);
 
 	dev_pm_domain_detach(dev, false);
-
-	return 0;
 }
 
 static const struct dev_pm_ops sdio_bus_pm_ops = {
diff --git a/drivers/net/ethernet/8390/mac8390.c b/drivers/net/ethernet/8390/mac8390.c
index 9aac7119d382..91b04abfd687 100644
--- a/drivers/net/ethernet/8390/mac8390.c
+++ b/drivers/net/ethernet/8390/mac8390.c
@@ -428,13 +428,12 @@ out:
 	return err;
 }
 
-static int mac8390_device_remove(struct nubus_board *board)
+static void mac8390_device_remove(struct nubus_board *board)
 {
 	struct net_device *dev = nubus_get_drvdata(board);
 
 	unregister_netdev(dev);
 	free_netdev(dev);
-	return 0;
 }
 
 static struct nubus_driver mac8390_driver = {
diff --git a/drivers/net/ethernet/natsemi/macsonic.c b/drivers/net/ethernet/natsemi/macsonic.c
index 2289e1fe3741..8709d700e15a 100644
--- a/drivers/net/ethernet/natsemi/macsonic.c
+++ b/drivers/net/ethernet/natsemi/macsonic.c
@@ -603,7 +603,7 @@ out:
 	return err;
 }
 
-static int mac_sonic_nubus_remove(struct nubus_board *board)
+static void mac_sonic_nubus_remove(struct nubus_board *board)
 {
 	struct net_device *ndev = nubus_get_drvdata(board);
 	struct sonic_local *lp = netdev_priv(ndev);
@@ -613,8 +613,6 @@ static int mac_sonic_nubus_remove(struct nubus_board *board)
 			  SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 			  lp->descriptors, lp->descriptors_laddr);
 	free_netdev(ndev);
-
-	return 0;
 }
 
 static struct nubus_driver mac_sonic_nubus_driver = {
diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c
index 62d033a1a557..29f5627d11e6 100644
--- a/drivers/net/netdevsim/bus.c
+++ b/drivers/net/netdevsim/bus.c
@@ -374,12 +374,11 @@ static int nsim_bus_probe(struct device *dev)
 	return nsim_dev_probe(nsim_bus_dev);
 }
 
-static int nsim_bus_remove(struct device *dev)
+static void nsim_bus_remove(struct device *dev)
 {
 	struct nsim_bus_dev *nsim_bus_dev = to_nsim_bus_dev(dev);
 
 	nsim_dev_remove(nsim_bus_dev);
-	return 0;
 }
 
 static int nsim_num_vf(struct device *dev)
diff --git a/drivers/ntb/core.c b/drivers/ntb/core.c
index f8f75a504a58..27dd93deff6e 100644
--- a/drivers/ntb/core.c
+++ b/drivers/ntb/core.c
@@ -271,7 +271,7 @@ static int ntb_probe(struct device *dev)
 	return rc;
 }
 
-static int ntb_remove(struct device *dev)
+static void ntb_remove(struct device *dev)
 {
 	struct ntb_dev *ntb;
 	struct ntb_client *client;
@@ -283,8 +283,6 @@ static int ntb_remove(struct device *dev)
 		client->ops.remove(client, ntb);
 		put_device(dev);
 	}
-
-	return 0;
 }
 
 static void ntb_dev_release(struct device *dev)
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index 4a02561cfb96..a9b97ebc71ac 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -304,7 +304,7 @@ static int ntb_transport_bus_probe(struct device *dev)
 	return rc;
 }
 
-static int ntb_transport_bus_remove(struct device *dev)
+static void ntb_transport_bus_remove(struct device *dev)
 {
 	const struct ntb_transport_client *client;
 
@@ -312,8 +312,6 @@ static int ntb_transport_bus_remove(struct device *dev)
 	client->remove(dev);
 
 	put_device(dev);
-
-	return 0;
 }
 
 static struct bus_type ntb_transport_bus = {
diff --git a/drivers/nubus/bus.c b/drivers/nubus/bus.c
index ad3d17c42e23..17fad660032c 100644
--- a/drivers/nubus/bus.c
+++ b/drivers/nubus/bus.c
@@ -29,14 +29,12 @@ static int nubus_device_probe(struct device *dev)
 	return err;
 }
 
-static int nubus_device_remove(struct device *dev)
+static void nubus_device_remove(struct device *dev)
 {
 	struct nubus_driver *ndrv = to_nubus_driver(dev->driver);
-	int err = -ENODEV;
 
-	if (dev->driver && ndrv->remove)
-		err = ndrv->remove(to_nubus_board(dev));
-	return err;
+	if (ndrv->remove)
+		ndrv->remove(to_nubus_board(dev));
 }
 
 struct bus_type nubus_bus_type = {
diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index e6aa87043a95..9dc7f3edd42b 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -108,7 +108,7 @@ static int nvdimm_bus_probe(struct device *dev)
 	return rc;
 }
 
-static int nvdimm_bus_remove(struct device *dev)
+static void nvdimm_bus_remove(struct device *dev)
 {
 	struct nd_device_driver *nd_drv = to_nd_device_driver(dev->driver);
 	struct module *provider = to_bus_provider(dev);
@@ -123,7 +123,6 @@ static int nvdimm_bus_remove(struct device *dev)
 	dev_dbg(&nvdimm_bus->dev, "%s.remove(%s)\n", dev->driver->name,
 			dev_name(dev));
 	module_put(provider);
-	return 0;
 }
 
 static void nvdimm_bus_shutdown(struct device *dev)
diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c
index e9289d10f822..502eb79cd551 100644
--- a/drivers/pci/endpoint/pci-epf-core.c
+++ b/drivers/pci/endpoint/pci-epf-core.c
@@ -387,17 +387,14 @@ static int pci_epf_device_probe(struct device *dev)
 	return driver->probe(epf);
 }
 
-static int pci_epf_device_remove(struct device *dev)
+static void pci_epf_device_remove(struct device *dev)
 {
-	int ret = 0;
 	struct pci_epf *epf = to_pci_epf(dev);
 	struct pci_epf_driver *driver = to_pci_epf_driver(dev->driver);
 
 	if (driver->remove)
-		ret = driver->remove(epf);
+		driver->remove(epf);
 	epf->driver = NULL;
-
-	return ret;
 }
 
 static struct bus_type pci_epf_bus_type = {
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 3a72352aa5cf..a0615395500a 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -440,7 +440,7 @@ static int pci_device_probe(struct device *dev)
 	return error;
 }
 
-static int pci_device_remove(struct device *dev)
+static void pci_device_remove(struct device *dev)
 {
 	struct pci_dev *pci_dev = to_pci_dev(dev);
 	struct pci_driver *drv = pci_dev->driver;
@@ -476,7 +476,6 @@ static int pci_device_remove(struct device *dev)
 	 */
 
 	pci_dev_put(pci_dev);
-	return 0;
 }
 
 static void pci_device_shutdown(struct device *dev)
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 7bbf2673c7f2..b70f61fbcd4b 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -965,7 +965,7 @@ void pci_create_legacy_files(struct pci_bus *b)
 	b->legacy_io->read = pci_read_legacy_io;
 	b->legacy_io->write = pci_write_legacy_io;
 	b->legacy_io->mmap = pci_mmap_legacy_io;
-	b->legacy_io->mapping = iomem_get_mapping();
+	b->legacy_io->f_mapping = iomem_get_mapping;
 	pci_adjust_legacy_attr(b, pci_mmap_io);
 	error = device_create_bin_file(&b->dev, b->legacy_io);
 	if (error)
@@ -978,7 +978,7 @@ void pci_create_legacy_files(struct pci_bus *b)
 	b->legacy_mem->size = 1024*1024;
 	b->legacy_mem->attr.mode = 0600;
 	b->legacy_mem->mmap = pci_mmap_legacy_mem;
-	b->legacy_mem->mapping = iomem_get_mapping();
+	b->legacy_mem->f_mapping = iomem_get_mapping;
 	pci_adjust_legacy_attr(b, pci_mmap_mem);
 	error = device_create_bin_file(&b->dev, b->legacy_mem);
 	if (error)
@@ -1195,7 +1195,7 @@ static int pci_create_attr(struct pci_dev *pdev, int num, int write_combine)
 		}
 	}
 	if (res_attr->mmap)
-		res_attr->mapping = iomem_get_mapping();
+		res_attr->f_mapping = iomem_get_mapping;
 	res_attr->attr.name = res_attr_name;
 	res_attr->attr.mode = 0600;
 	res_attr->size = pci_resource_len(pdev, num);
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index bd81aa64d011..5bd1b80424e7 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -350,7 +350,7 @@ static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *le
 	return;
 }
 
-static int pcmcia_device_remove(struct device *dev)
+static void pcmcia_device_remove(struct device *dev)
 {
 	struct pcmcia_device *p_dev;
 	struct pcmcia_driver *p_drv;
@@ -389,8 +389,6 @@ static int pcmcia_device_remove(struct device *dev)
 	/* references from pcmcia_device_probe */
 	pcmcia_put_dev(p_dev);
 	module_put(p_drv->owner);
-
-	return 0;
 }
 
 
diff --git a/drivers/platform/surface/aggregator/bus.c b/drivers/platform/surface/aggregator/bus.c
index 0169677c243e..0a40dd9c94ed 100644
--- a/drivers/platform/surface/aggregator/bus.c
+++ b/drivers/platform/surface/aggregator/bus.c
@@ -316,14 +316,12 @@ static int ssam_bus_probe(struct device *dev)
 		->probe(to_ssam_device(dev));
 }
 
-static int ssam_bus_remove(struct device *dev)
+static void ssam_bus_remove(struct device *dev)
 {
 	struct ssam_device_driver *sdrv = to_ssam_device_driver(dev->driver);
 
 	if (sdrv->remove)
 		sdrv->remove(to_ssam_device(dev));
-
-	return 0;
 }
 
 struct bus_type ssam_bus_type = {
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 62e0d56a3332..a76313006bdc 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -980,7 +980,7 @@ probe_failure:
 	return ret;
 }
 
-static int wmi_dev_remove(struct device *dev)
+static void wmi_dev_remove(struct device *dev)
 {
 	struct wmi_block *wblock = dev_to_wblock(dev);
 	struct wmi_driver *wdriver =
@@ -997,8 +997,6 @@ static int wmi_dev_remove(struct device *dev)
 
 	if (ACPI_FAILURE(wmi_method_enable(wblock, 0)))
 		dev_warn(dev, "failed to disable device\n");
-
-	return 0;
 }
 
 static struct class wmi_bus_class = {
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index c29d590c5e4f..cc6757dfa3f1 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -123,7 +123,7 @@ fail:
 	return error;
 }
 
-static int pnp_device_remove(struct device *dev)
+static void pnp_device_remove(struct device *dev)
 {
 	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
 	struct pnp_driver *drv = pnp_dev->driver;
@@ -139,7 +139,6 @@ static int pnp_device_remove(struct device *dev)
 		pnp_disable_dev(pnp_dev);
 
 	pnp_device_detach(pnp_dev);
-	return 0;
 }
 
 static void pnp_device_shutdown(struct device *dev)
diff --git a/drivers/rapidio/rio-driver.c b/drivers/rapidio/rio-driver.c
index 72874153972e..a72bb0a40fcf 100644
--- a/drivers/rapidio/rio-driver.c
+++ b/drivers/rapidio/rio-driver.c
@@ -112,7 +112,7 @@ static int rio_device_probe(struct device *dev)
  * driver, then run the driver remove() method.  Then update
  * the reference count.
  */
-static int rio_device_remove(struct device *dev)
+static void rio_device_remove(struct device *dev)
 {
 	struct rio_dev *rdev = to_rio_dev(dev);
 	struct rio_driver *rdrv = rdev->driver;
@@ -124,8 +124,6 @@ static int rio_device_remove(struct device *dev)
 	}
 
 	rio_dev_put(rdev);
-
-	return 0;
 }
 
 static void rio_device_shutdown(struct device *dev)
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index c1404d3dae2c..9151836190ce 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -530,14 +530,13 @@ out:
 	return err;
 }
 
-static int rpmsg_dev_remove(struct device *dev)
+static void rpmsg_dev_remove(struct device *dev)
 {
 	struct rpmsg_device *rpdev = to_rpmsg_device(dev);
 	struct rpmsg_driver *rpdrv = to_rpmsg_driver(rpdev->dev.driver);
-	int err = 0;
 
 	if (rpdev->ops->announce_destroy)
-		err = rpdev->ops->announce_destroy(rpdev);
+		rpdev->ops->announce_destroy(rpdev);
 
 	if (rpdrv->remove)
 		rpdrv->remove(rpdev);
@@ -546,8 +545,6 @@ static int rpmsg_dev_remove(struct device *dev)
 
 	if (rpdev->ept)
 		rpmsg_destroy_ept(rpdev->ept);
-
-	return err;
 }
 
 static struct bus_type rpmsg_bus = {
diff --git a/drivers/s390/block/scm_drv.c b/drivers/s390/block/scm_drv.c
index 3134fd6e058e..69a845eb8b1f 100644
--- a/drivers/s390/block/scm_drv.c
+++ b/drivers/s390/block/scm_drv.c
@@ -60,15 +60,13 @@ out:
 	return ret;
 }
 
-static int scm_remove(struct scm_device *scmdev)
+static void scm_remove(struct scm_device *scmdev)
 {
 	struct scm_blk_dev *bdev = dev_get_drvdata(&scmdev->dev);
 
 	scm_blk_dev_cleanup(bdev);
 	dev_set_drvdata(&scmdev->dev, NULL);
 	kfree(bdev);
-
-	return 0;
 }
 
 static struct scm_driver scm_drv = {
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index acbe76a76fb2..2ec741106cb6 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -439,17 +439,13 @@ module_exit(cleanup_ccwgroup);
 
 /************************** driver stuff ******************************/
 
-static int ccwgroup_remove(struct device *dev)
+static void ccwgroup_remove(struct device *dev)
 {
 	struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
 	struct ccwgroup_driver *gdrv = to_ccwgroupdrv(dev->driver);
 
-	if (!dev->driver)
-		return 0;
 	if (gdrv->remove)
 		gdrv->remove(gdev);
-
-	return 0;
 }
 
 static void ccwgroup_shutdown(struct device *dev)
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c
index c42405c620b5..684348d82f08 100644
--- a/drivers/s390/cio/chsc_sch.c
+++ b/drivers/s390/cio/chsc_sch.c
@@ -100,7 +100,7 @@ static int chsc_subchannel_probe(struct subchannel *sch)
 	return ret;
 }
 
-static int chsc_subchannel_remove(struct subchannel *sch)
+static void chsc_subchannel_remove(struct subchannel *sch)
 {
 	struct chsc_private *private;
 
@@ -112,7 +112,6 @@ static int chsc_subchannel_remove(struct subchannel *sch)
 		put_device(&sch->dev);
 	}
 	kfree(private);
-	return 0;
 }
 
 static void chsc_subchannel_shutdown(struct subchannel *sch)
diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 0ce48a354e04..3377097e65de 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -1401,15 +1401,14 @@ static int css_probe(struct device *dev)
 	return ret;
 }
 
-static int css_remove(struct device *dev)
+static void css_remove(struct device *dev)
 {
 	struct subchannel *sch;
-	int ret;
 
 	sch = to_subchannel(dev);
-	ret = sch->driver->remove ? sch->driver->remove(sch) : 0;
+	if (sch->driver->remove)
+		sch->driver->remove(sch);
 	sch->driver = NULL;
-	return ret;
 }
 
 static void css_shutdown(struct device *dev)
diff --git a/drivers/s390/cio/css.h b/drivers/s390/cio/css.h
index 2eddfc47f687..c98522cbe276 100644
--- a/drivers/s390/cio/css.h
+++ b/drivers/s390/cio/css.h
@@ -81,7 +81,7 @@ struct css_driver {
 	int (*chp_event)(struct subchannel *, struct chp_link *, int);
 	int (*sch_event)(struct subchannel *, int);
 	int (*probe)(struct subchannel *);
-	int (*remove)(struct subchannel *);
+	void (*remove)(struct subchannel *);
 	void (*shutdown)(struct subchannel *);
 	int (*settle)(void);
 };
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 84f659cafe76..adf33b653d87 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -137,7 +137,7 @@ static int ccw_uevent(struct device *dev, struct kobj_uevent_env *env)
 
 static void io_subchannel_irq(struct subchannel *);
 static int io_subchannel_probe(struct subchannel *);
-static int io_subchannel_remove(struct subchannel *);
+static void io_subchannel_remove(struct subchannel *);
 static void io_subchannel_shutdown(struct subchannel *);
 static int io_subchannel_sch_event(struct subchannel *, int);
 static int io_subchannel_chp_event(struct subchannel *, struct chp_link *,
@@ -1101,7 +1101,7 @@ out_schedule:
 	return 0;
 }
 
-static int io_subchannel_remove(struct subchannel *sch)
+static void io_subchannel_remove(struct subchannel *sch)
 {
 	struct io_subchannel_private *io_priv = to_io_private(sch);
 	struct ccw_device *cdev;
@@ -1120,7 +1120,6 @@ out_free:
 			  io_priv->dma_area, io_priv->dma_area_dma);
 	kfree(io_priv);
 	sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);
-	return 0;
 }
 
 static void io_subchannel_verify(struct subchannel *sch)
@@ -1742,7 +1741,7 @@ ccw_device_probe (struct device *dev)
 	return 0;
 }
 
-static int ccw_device_remove(struct device *dev)
+static void ccw_device_remove(struct device *dev)
 {
 	struct ccw_device *cdev = to_ccwdev(dev);
 	struct ccw_driver *cdrv = cdev->drv;
@@ -1776,8 +1775,6 @@ static int ccw_device_remove(struct device *dev)
 	spin_unlock_irq(cdev->ccwlock);
 	io_subchannel_quiesce(sch);
 	__disable_cmf(cdev);
-
-	return 0;
 }
 
 static void ccw_device_shutdown(struct device *dev)
diff --git a/drivers/s390/cio/eadm_sch.c b/drivers/s390/cio/eadm_sch.c
index c8964e0a23e7..15bdae5981ca 100644
--- a/drivers/s390/cio/eadm_sch.c
+++ b/drivers/s390/cio/eadm_sch.c
@@ -282,7 +282,7 @@ disable:
 	spin_unlock_irq(sch->lock);
 }
 
-static int eadm_subchannel_remove(struct subchannel *sch)
+static void eadm_subchannel_remove(struct subchannel *sch)
 {
 	struct eadm_private *private = get_eadm_private(sch);
 
@@ -297,8 +297,6 @@ static int eadm_subchannel_remove(struct subchannel *sch)
 	spin_unlock_irq(sch->lock);
 
 	kfree(private);
-
-	return 0;
 }
 
 static void eadm_subchannel_shutdown(struct subchannel *sch)
diff --git a/drivers/s390/cio/scm.c b/drivers/s390/cio/scm.c
index 9f26d4310bb3..b6b4589c70bd 100644
--- a/drivers/s390/cio/scm.c
+++ b/drivers/s390/cio/scm.c
@@ -28,12 +28,13 @@ static int scmdev_probe(struct device *dev)
 	return scmdrv->probe ? scmdrv->probe(scmdev) : -ENODEV;
 }
 
-static int scmdev_remove(struct device *dev)
+static void scmdev_remove(struct device *dev)
 {
 	struct scm_device *scmdev = to_scm_dev(dev);
 	struct scm_driver *scmdrv = to_scm_drv(dev->driver);
 
-	return scmdrv->remove ? scmdrv->remove(scmdev) : -ENODEV;
+	if (scmdrv->remove)
+		scmdrv->remove(scmdev);
 }
 
 static int scmdev_uevent(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
index 9b61e9b131ad..76099bcb765b 100644
--- a/drivers/s390/cio/vfio_ccw_drv.c
+++ b/drivers/s390/cio/vfio_ccw_drv.c
@@ -234,7 +234,7 @@ out_free:
 	return ret;
 }
 
-static int vfio_ccw_sch_remove(struct subchannel *sch)
+static void vfio_ccw_sch_remove(struct subchannel *sch)
 {
 	struct vfio_ccw_private *private = dev_get_drvdata(&sch->dev);
 	struct vfio_ccw_crw *crw, *temp;
@@ -257,7 +257,6 @@ static int vfio_ccw_sch_remove(struct subchannel *sch)
 	VFIO_CCW_MSG_EVENT(4, "unbound from subchannel %x.%x.%04x\n",
 			   sch->schid.cssid, sch->schid.ssid,
 			   sch->schid.sch_no);
-	return 0;
 }
 
 static void vfio_ccw_sch_shutdown(struct subchannel *sch)
diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index 439c1f6d2866..f433428057d9 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -890,7 +890,7 @@ out:
 	return rc;
 }
 
-static int ap_device_remove(struct device *dev)
+static void ap_device_remove(struct device *dev)
 {
 	struct ap_device *ap_dev = to_ap_dev(dev);
 	struct ap_driver *ap_drv = to_ap_drv(dev->driver);
@@ -914,8 +914,6 @@ static int ap_device_remove(struct device *dev)
 	spin_unlock_bh(&ap_queues_lock);
 
 	put_device(dev);
-
-	return 0;
 }
 
 struct ap_queue *ap_get_qdev(ap_qid_t qid)
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 5b3a20a140f9..58f69366bdcc 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -7674,7 +7674,7 @@ static int sdebug_driver_probe(struct device *dev)
 	return error;
 }
 
-static int sdebug_driver_remove(struct device *dev)
+static void sdebug_driver_remove(struct device *dev)
 {
 	struct sdebug_host_info *sdbg_host;
 	struct sdebug_dev_info *sdbg_devinfo, *tmp;
@@ -7691,7 +7691,6 @@ static int sdebug_driver_remove(struct device *dev)
 	}
 
 	scsi_host_put(sdbg_host->shost);
-	return 0;
 }
 
 static int pseudo_lld_bus_match(struct device *dev,
diff --git a/drivers/sh/superhyway/superhyway.c b/drivers/sh/superhyway/superhyway.c
index 348836b90605..44324abe21da 100644
--- a/drivers/sh/superhyway/superhyway.c
+++ b/drivers/sh/superhyway/superhyway.c
@@ -150,17 +150,13 @@ static int superhyway_device_probe(struct device *dev)
 	return -ENODEV;
 }
 
-static int superhyway_device_remove(struct device *dev)
+static void superhyway_device_remove(struct device *dev)
 {
 	struct superhyway_device *shyway_dev = to_superhyway_device(dev);
 	struct superhyway_driver *shyway_drv = to_superhyway_driver(dev->driver);
 
-	if (shyway_drv && shyway_drv->remove) {
+	if (shyway_drv->remove)
 		shyway_drv->remove(shyway_dev);
-		return 0;
-	}
-
-	return -ENODEV;
 }
 
 /**
diff --git a/drivers/siox/siox-core.c b/drivers/siox/siox-core.c
index 1794ff0106bc..7c4f32d76966 100644
--- a/drivers/siox/siox-core.c
+++ b/drivers/siox/siox-core.c
@@ -520,7 +520,7 @@ static int siox_probe(struct device *dev)
 	return sdriver->probe(sdevice);
 }
 
-static int siox_remove(struct device *dev)
+static void siox_remove(struct device *dev)
 {
 	struct siox_driver *sdriver =
 		container_of(dev->driver, struct siox_driver, driver);
@@ -528,8 +528,6 @@ static int siox_remove(struct device *dev)
 
 	if (sdriver->remove)
 		sdriver->remove(sdevice);
-
-	return 0;
 }
 
 static void siox_shutdown(struct device *dev)
diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c
index 1d2bc181da05..78480e332ab8 100644
--- a/drivers/slimbus/core.c
+++ b/drivers/slimbus/core.c
@@ -81,7 +81,7 @@ static int slim_device_probe(struct device *dev)
 	return ret;
 }
 
-static int slim_device_remove(struct device *dev)
+static void slim_device_remove(struct device *dev)
 {
 	struct slim_device *sbdev = to_slim_device(dev);
 	struct slim_driver *sbdrv;
@@ -91,8 +91,6 @@ static int slim_device_remove(struct device *dev)
 		if (sbdrv->remove)
 			sbdrv->remove(sbdev);
 	}
-
-	return 0;
 }
 
 static int slim_device_uevent(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/soc/qcom/apr.c b/drivers/soc/qcom/apr.c
index 7abfc8c4fdc7..475a57b435b2 100644
--- a/drivers/soc/qcom/apr.c
+++ b/drivers/soc/qcom/apr.c
@@ -217,7 +217,7 @@ static int apr_device_probe(struct device *dev)
 	return adrv->probe(adev);
 }
 
-static int apr_device_remove(struct device *dev)
+static void apr_device_remove(struct device *dev)
 {
 	struct apr_device *adev = to_apr_device(dev);
 	struct apr_driver *adrv;
@@ -231,8 +231,6 @@ static int apr_device_remove(struct device *dev)
 		idr_remove(&apr->svcs_idr, adev->svc_id);
 		spin_unlock(&apr->svcs_lock);
 	}
-
-	return 0;
 }
 
 static int apr_uevent(struct device *dev, struct kobj_uevent_env *env)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 65d14af9c015..57e2499ec1ed 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -409,7 +409,7 @@ static int spi_probe(struct device *dev)
 	return ret;
 }
 
-static int spi_remove(struct device *dev)
+static void spi_remove(struct device *dev)
 {
 	const struct spi_driver		*sdrv = to_spi_driver(dev->driver);
 
@@ -424,8 +424,6 @@ static int spi_remove(struct device *dev)
 	}
 
 	dev_pm_domain_detach(dev, true);
-
-	return 0;
 }
 
 static void spi_shutdown(struct device *dev)
diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c
index 51f5aeb65b3b..b37ead9e2fad 100644
--- a/drivers/spmi/spmi.c
+++ b/drivers/spmi/spmi.c
@@ -345,7 +345,7 @@ fail_probe:
 	return err;
 }
 
-static int spmi_drv_remove(struct device *dev)
+static void spmi_drv_remove(struct device *dev)
 {
 	const struct spmi_driver *sdrv = to_spmi_driver(dev->driver);
 
@@ -356,7 +356,6 @@ static int spmi_drv_remove(struct device *dev)
 	pm_runtime_disable(dev);
 	pm_runtime_set_suspended(dev);
 	pm_runtime_put_noidle(dev);
-	return 0;
 }
 
 static void spmi_drv_shutdown(struct device *dev)
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 3a29b5570f9f..8a93c83cb6f8 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -283,7 +283,7 @@ static void ssb_device_shutdown(struct device *dev)
 		ssb_drv->shutdown(ssb_dev);
 }
 
-static int ssb_device_remove(struct device *dev)
+static void ssb_device_remove(struct device *dev)
 {
 	struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
 	struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver);
@@ -291,8 +291,6 @@ static int ssb_device_remove(struct device *dev)
 	if (ssb_drv && ssb_drv->remove)
 		ssb_drv->remove(ssb_dev);
 	ssb_device_put(ssb_dev);
-
-	return 0;
 }
 
 static int ssb_device_probe(struct device *dev)
diff --git a/drivers/staging/fieldbus/anybuss/host.c b/drivers/staging/fieldbus/anybuss/host.c
index 0f730efe9a6d..8a75f6642c78 100644
--- a/drivers/staging/fieldbus/anybuss/host.c
+++ b/drivers/staging/fieldbus/anybuss/host.c
@@ -1186,15 +1186,13 @@ static int anybus_bus_probe(struct device *dev)
 	return adrv->probe(adev);
 }
 
-static int anybus_bus_remove(struct device *dev)
+static void anybus_bus_remove(struct device *dev)
 {
 	struct anybuss_client_driver *adrv =
 		to_anybuss_client_driver(dev->driver);
 
 	if (adrv->remove)
 		adrv->remove(to_anybuss_client(dev));
-
-	return 0;
 }
 
 static struct bus_type anybus_bus = {
diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c
index 13d319860da5..5a5c17a4519b 100644
--- a/drivers/staging/greybus/gbphy.c
+++ b/drivers/staging/greybus/gbphy.c
@@ -169,7 +169,7 @@ static int gbphy_dev_probe(struct device *dev)
 	return ret;
 }
 
-static int gbphy_dev_remove(struct device *dev)
+static void gbphy_dev_remove(struct device *dev)
 {
 	struct gbphy_driver *gbphy_drv = to_gbphy_driver(dev->driver);
 	struct gbphy_device *gbphy_dev = to_gbphy_dev(dev);
@@ -180,8 +180,6 @@ static int gbphy_dev_remove(struct device *dev)
 	pm_runtime_set_suspended(dev);
 	pm_runtime_put_noidle(dev);
 	pm_runtime_dont_use_autosuspend(dev);
-
-	return 0;
 }
 
 static struct bus_type gbphy_bus_type = {
diff --git a/drivers/target/loopback/tcm_loop.c b/drivers/target/loopback/tcm_loop.c
index 6d0b0e67e79e..cbb2118fb35e 100644
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -81,7 +81,7 @@ static int tcm_loop_show_info(struct seq_file *m, struct Scsi_Host *host)
 }
 
 static int tcm_loop_driver_probe(struct device *);
-static int tcm_loop_driver_remove(struct device *);
+static void tcm_loop_driver_remove(struct device *);
 
 static int pseudo_lld_bus_match(struct device *dev,
 				struct device_driver *dev_driver)
@@ -363,7 +363,7 @@ static int tcm_loop_driver_probe(struct device *dev)
 	return 0;
 }
 
-static int tcm_loop_driver_remove(struct device *dev)
+static void tcm_loop_driver_remove(struct device *dev)
 {
 	struct tcm_loop_hba *tl_hba;
 	struct Scsi_Host *sh;
@@ -373,7 +373,6 @@ static int tcm_loop_driver_remove(struct device *dev)
 
 	scsi_remove_host(sh);
 	scsi_host_put(sh);
-	return 0;
 }
 
 static void tcm_loop_release_adapter(struct device *dev)
diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index a062befcb3b2..7018d959f775 100644
--- a/drivers/thunderbolt/domain.c
+++ b/drivers/thunderbolt/domain.c
@@ -86,7 +86,7 @@ static int tb_service_probe(struct device *dev)
 	return driver->probe(svc, id);
 }
 
-static int tb_service_remove(struct device *dev)
+static void tb_service_remove(struct device *dev)
 {
 	struct tb_service *svc = tb_to_service(dev);
 	struct tb_service_driver *driver;
@@ -94,8 +94,6 @@ static int tb_service_remove(struct device *dev)
 	driver = container_of(dev->driver, struct tb_service_driver, driver);
 	if (driver->remove)
 		driver->remove(svc);
-
-	return 0;
 }
 
 static void tb_service_shutdown(struct device *dev)
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index 9cdfcfe07e87..92498961fd92 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -421,15 +421,13 @@ static int serdev_drv_probe(struct device *dev)
 	return ret;
 }
 
-static int serdev_drv_remove(struct device *dev)
+static void serdev_drv_remove(struct device *dev)
 {
 	const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver);
 	if (sdrv->remove)
 		sdrv->remove(to_serdev_device(dev));
 
 	dev_pm_domain_detach(dev, true);
-
-	return 0;
 }
 
 static struct bus_type serdev_bus_type = {
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 7e13b74e60e5..4169cf40a03b 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -78,14 +78,12 @@ static int ulpi_probe(struct device *dev)
 	return drv->probe(to_ulpi_dev(dev));
 }
 
-static int ulpi_remove(struct device *dev)
+static void ulpi_remove(struct device *dev)
 {
 	struct ulpi_driver *drv = to_ulpi_driver(dev->driver);
 
 	if (drv->remove)
 		drv->remove(to_ulpi_dev(dev));
-
-	return 0;
 }
 
 static struct bus_type ulpi_bus = {
diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c
index 7133818a58b9..9e38142acd38 100644
--- a/drivers/usb/serial/bus.c
+++ b/drivers/usb/serial/bus.c
@@ -74,7 +74,7 @@ err_autopm_put:
 	return retval;
 }
 
-static int usb_serial_device_remove(struct device *dev)
+static void usb_serial_device_remove(struct device *dev)
 {
 	struct usb_serial_port *port = to_usb_serial_port(dev);
 	struct usb_serial_driver *driver;
@@ -101,8 +101,6 @@ static int usb_serial_device_remove(struct device *dev)
 
 	if (!autopm_err)
 		usb_autopm_put_interface(port->serial->interface);
-
-	return 0;
 }
 
 static ssize_t new_id_store(struct device_driver *driver,
diff --git a/drivers/usb/typec/bus.c b/drivers/usb/typec/bus.c
index 7f3c9a8e2bf0..78e0e78954f2 100644
--- a/drivers/usb/typec/bus.c
+++ b/drivers/usb/typec/bus.c
@@ -382,7 +382,7 @@ static int typec_probe(struct device *dev)
 	return ret;
 }
 
-static int typec_remove(struct device *dev)
+static void typec_remove(struct device *dev)
 {
 	struct typec_altmode_driver *drv = to_altmode_driver(dev->driver);
 	struct typec_altmode *adev = to_typec_altmode(dev);
@@ -400,8 +400,6 @@ static int typec_remove(struct device *dev)
 
 	adev->desc = NULL;
 	adev->ops = NULL;
-
-	return 0;
 }
 
 struct bus_type typec_bus = {
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index bb3f1d1f0422..3fc4525fc05c 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -34,15 +34,13 @@ static int vdpa_dev_probe(struct device *d)
 	return ret;
 }
 
-static int vdpa_dev_remove(struct device *d)
+static void vdpa_dev_remove(struct device *d)
 {
 	struct vdpa_device *vdev = dev_to_vdpa(d);
 	struct vdpa_driver *drv = drv_to_vdpa(vdev->dev.driver);
 
 	if (drv && drv->remove)
 		drv->remove(vdev);
-
-	return 0;
 }
 
 static struct bus_type vdpa_bus = {
diff --git a/drivers/vfio/mdev/mdev_driver.c b/drivers/vfio/mdev/mdev_driver.c
index c368ec824e2b..e2cb1ff56f6c 100644
--- a/drivers/vfio/mdev/mdev_driver.c
+++ b/drivers/vfio/mdev/mdev_driver.c
@@ -57,7 +57,7 @@ static int mdev_probe(struct device *dev)
 	return ret;
 }
 
-static int mdev_remove(struct device *dev)
+static void mdev_remove(struct device *dev)
 {
 	struct mdev_driver *drv =
 		container_of(dev->driver, struct mdev_driver, driver);
@@ -67,8 +67,6 @@ static int mdev_remove(struct device *dev)
 		drv->remove(mdev);
 
 	mdev_detach_iommu(mdev);
-
-	return 0;
 }
 
 static int mdev_match(struct device *dev, struct device_driver *drv)
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 49984d2cba24..1ea0c1f6a1fd 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -278,7 +278,7 @@ err:
 
 }
 
-static int virtio_dev_remove(struct device *_d)
+static void virtio_dev_remove(struct device *_d)
 {
 	struct virtio_device *dev = dev_to_virtio(_d);
 	struct virtio_driver *drv = drv_to_virtio(dev->dev.driver);
@@ -292,7 +292,6 @@ static int virtio_dev_remove(struct device *_d)
 
 	/* Acknowledge the device's existence again. */
 	virtio_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE);
-	return 0;
 }
 
 static struct bus_type virtio_bus = {
diff --git a/drivers/vlynq/vlynq.c b/drivers/vlynq/vlynq.c
index e966981c0215..4af6615808cc 100644
--- a/drivers/vlynq/vlynq.c
+++ b/drivers/vlynq/vlynq.c
@@ -342,14 +342,12 @@ static int vlynq_device_probe(struct device *dev)
 	return result;
 }
 
-static int vlynq_device_remove(struct device *dev)
+static void vlynq_device_remove(struct device *dev)
 {
 	struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
 
 	if (drv->remove)
 		drv->remove(to_vlynq_device(dev));
-
-	return 0;
 }
 
 int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner)
diff --git a/drivers/vme/vme.c b/drivers/vme/vme.c
index 1b15afea28ee..8dba20186be3 100644
--- a/drivers/vme/vme.c
+++ b/drivers/vme/vme.c
@@ -1990,7 +1990,7 @@ static int vme_bus_probe(struct device *dev)
 	return -ENODEV;
 }
 
-static int vme_bus_remove(struct device *dev)
+static void vme_bus_remove(struct device *dev)
 {
 	struct vme_driver *driver;
 	struct vme_dev *vdev = dev_to_vme_dev(dev);
@@ -1998,8 +1998,6 @@ static int vme_bus_remove(struct device *dev)
 	driver = dev->platform_data;
 	if (driver->remove)
 		driver->remove(vdev);
-
-	return 0;
 }
 
 struct bus_type vme_bus_type = {
diff --git a/drivers/xen/xenbus/xenbus.h b/drivers/xen/xenbus/xenbus.h
index 2a93b7c9c159..2754bdfadcb8 100644
--- a/drivers/xen/xenbus/xenbus.h
+++ b/drivers/xen/xenbus/xenbus.h
@@ -106,7 +106,7 @@ void xs_request_exit(struct xb_req_data *req);
 
 int xenbus_match(struct device *_dev, struct device_driver *_drv);
 int xenbus_dev_probe(struct device *_dev);
-int xenbus_dev_remove(struct device *_dev);
+void xenbus_dev_remove(struct device *_dev);
 int xenbus_register_driver_common(struct xenbus_driver *drv,
 				  struct xen_bus_type *bus,
 				  struct module *owner,
diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 33d09b3f6211..bd003ca8acbe 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -325,7 +325,7 @@ fail:
 }
 EXPORT_SYMBOL_GPL(xenbus_dev_probe);
 
-int xenbus_dev_remove(struct device *_dev)
+void xenbus_dev_remove(struct device *_dev)
 {
 	struct xenbus_device *dev = to_xenbus_device(_dev);
 	struct xenbus_driver *drv = to_xenbus_driver(_dev->driver);
@@ -355,8 +355,6 @@ int xenbus_dev_remove(struct device *_dev)
 	if (!drv->allow_rebind ||
 	    xenbus_read_driver_state(dev->nodename) == XenbusStateClosing)
 		xenbus_switch_state(dev, XenbusStateClosed);
-
-	return 0;
 }
 EXPORT_SYMBOL_GPL(xenbus_dev_remove);
 
diff --git a/drivers/zorro/zorro-driver.c b/drivers/zorro/zorro-driver.c
index 0dd7cbcec2b0..96f068830549 100644
--- a/drivers/zorro/zorro-driver.c
+++ b/drivers/zorro/zorro-driver.c
@@ -47,32 +47,26 @@ static int zorro_device_probe(struct device *dev)
 	struct zorro_driver *drv = to_zorro_driver(dev->driver);
 	struct zorro_dev *z = to_zorro_dev(dev);
 
-	if (!z->driver && drv->probe) {
+	if (drv->probe) {
 		const struct zorro_device_id *id;
 
 		id = zorro_match_device(drv->id_table, z);
 		if (id)
 			error = drv->probe(z, id);
-		if (error >= 0) {
-			z->driver = drv;
+		if (error >= 0)
 			error = 0;
-		}
 	}
 	return error;
 }
 
 
-static int zorro_device_remove(struct device *dev)
+static void zorro_device_remove(struct device *dev)
 {
 	struct zorro_dev *z = to_zorro_dev(dev);
 	struct zorro_driver *drv = to_zorro_driver(dev->driver);
 
-	if (drv) {
-		if (drv->remove)
-			drv->remove(z);
-		z->driver = NULL;
-	}
-	return 0;
+	if (drv->remove)
+		drv->remove(z);
 }
 
 
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index df00231d3ecc..7d162b0efbf0 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -179,8 +179,10 @@ static int open_proxy_open(struct inode *inode, struct file *filp)
 	if (!fops_get(real_fops)) {
 #ifdef CONFIG_MODULES
 		if (real_fops->owner &&
-		    real_fops->owner->state == MODULE_STATE_GOING)
+		    real_fops->owner->state == MODULE_STATE_GOING) {
+			r = -ENXIO;
 			goto out;
+		}
 #endif
 
 		/* Huh? Module did not clean up after itself at exit? */
@@ -314,8 +316,10 @@ static int full_proxy_open(struct inode *inode, struct file *filp)
 	if (!fops_get(real_fops)) {
 #ifdef CONFIG_MODULES
 		if (real_fops->owner &&
-		    real_fops->owner->state == MODULE_STATE_GOING)
+		    real_fops->owner->state == MODULE_STATE_GOING) {
+			r = -ENXIO;
 			goto out;
+		}
 #endif
 
 		/* Huh? Module did not cleanup after itself at exit? */
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 33166ec90a11..ba581429bf7b 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -17,7 +17,7 @@
 
 #include "kernfs-internal.h"
 
-DEFINE_MUTEX(kernfs_mutex);
+DECLARE_RWSEM(kernfs_rwsem);
 static DEFINE_SPINLOCK(kernfs_rename_lock);	/* kn->parent and ->name */
 static char kernfs_pr_cont_buf[PATH_MAX];	/* protected by rename_lock */
 static DEFINE_SPINLOCK(kernfs_idr_lock);	/* root->ino_idr */
@@ -26,7 +26,7 @@ static DEFINE_SPINLOCK(kernfs_idr_lock);	/* root->ino_idr */
 
 static bool kernfs_active(struct kernfs_node *kn)
 {
-	lockdep_assert_held(&kernfs_mutex);
+	lockdep_assert_held(&kernfs_rwsem);
 	return atomic_read(&kn->active) >= 0;
 }
 
@@ -340,7 +340,7 @@ static int kernfs_sd_compare(const struct kernfs_node *left,
  *	@kn->parent->dir.children.
  *
  *	Locking:
- *	mutex_lock(kernfs_mutex)
+ *	kernfs_rwsem held exclusive
  *
  *	RETURNS:
  *	0 on susccess -EEXIST on failure.
@@ -372,6 +372,7 @@ static int kernfs_link_sibling(struct kernfs_node *kn)
 	/* successfully added, account subdir number */
 	if (kernfs_type(kn) == KERNFS_DIR)
 		kn->parent->dir.subdirs++;
+	kernfs_inc_rev(kn->parent);
 
 	return 0;
 }
@@ -385,7 +386,7 @@ static int kernfs_link_sibling(struct kernfs_node *kn)
  *	removed, %false if @kn wasn't on the rbtree.
  *
  *	Locking:
- *	mutex_lock(kernfs_mutex)
+ *	kernfs_rwsem held exclusive
  */
 static bool kernfs_unlink_sibling(struct kernfs_node *kn)
 {
@@ -394,6 +395,7 @@ static bool kernfs_unlink_sibling(struct kernfs_node *kn)
 
 	if (kernfs_type(kn) == KERNFS_DIR)
 		kn->parent->dir.subdirs--;
+	kernfs_inc_rev(kn->parent);
 
 	rb_erase(&kn->rb, &kn->parent->dir.children);
 	RB_CLEAR_NODE(&kn->rb);
@@ -455,14 +457,14 @@ void kernfs_put_active(struct kernfs_node *kn)
  * return after draining is complete.
  */
 static void kernfs_drain(struct kernfs_node *kn)
-	__releases(&kernfs_mutex) __acquires(&kernfs_mutex)
+	__releases(&kernfs_rwsem) __acquires(&kernfs_rwsem)
 {
 	struct kernfs_root *root = kernfs_root(kn);
 
-	lockdep_assert_held(&kernfs_mutex);
+	lockdep_assert_held_write(&kernfs_rwsem);
 	WARN_ON_ONCE(kernfs_active(kn));
 
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 
 	if (kernfs_lockdep(kn)) {
 		rwsem_acquire(&kn->dep_map, 0, 0, _RET_IP_);
@@ -481,7 +483,7 @@ static void kernfs_drain(struct kernfs_node *kn)
 
 	kernfs_drain_open_files(kn);
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 }
 
 /**
@@ -720,7 +722,7 @@ int kernfs_add_one(struct kernfs_node *kn)
 	bool has_ns;
 	int ret;
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 
 	ret = -EINVAL;
 	has_ns = kernfs_ns_enabled(parent);
@@ -751,7 +753,7 @@ int kernfs_add_one(struct kernfs_node *kn)
 		ps_iattr->ia_mtime = ps_iattr->ia_ctime;
 	}
 
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 
 	/*
 	 * Activate the new node unless CREATE_DEACTIVATED is requested.
@@ -765,7 +767,7 @@ int kernfs_add_one(struct kernfs_node *kn)
 	return 0;
 
 out_unlock:
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 	return ret;
 }
 
@@ -786,7 +788,7 @@ static struct kernfs_node *kernfs_find_ns(struct kernfs_node *parent,
 	bool has_ns = kernfs_ns_enabled(parent);
 	unsigned int hash;
 
-	lockdep_assert_held(&kernfs_mutex);
+	lockdep_assert_held(&kernfs_rwsem);
 
 	if (has_ns != (bool)ns) {
 		WARN(1, KERN_WARNING "kernfs: ns %s in '%s' for '%s'\n",
@@ -818,7 +820,7 @@ static struct kernfs_node *kernfs_walk_ns(struct kernfs_node *parent,
 	size_t len;
 	char *p, *name;
 
-	lockdep_assert_held(&kernfs_mutex);
+	lockdep_assert_held_read(&kernfs_rwsem);
 
 	/* grab kernfs_rename_lock to piggy back on kernfs_pr_cont_buf */
 	spin_lock_irq(&kernfs_rename_lock);
@@ -858,10 +860,10 @@ struct kernfs_node *kernfs_find_and_get_ns(struct kernfs_node *parent,
 {
 	struct kernfs_node *kn;
 
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
 	kn = kernfs_find_ns(parent, name, ns);
 	kernfs_get(kn);
-	mutex_unlock(&kernfs_mutex);
+	up_read(&kernfs_rwsem);
 
 	return kn;
 }
@@ -882,10 +884,10 @@ struct kernfs_node *kernfs_walk_and_get_ns(struct kernfs_node *parent,
 {
 	struct kernfs_node *kn;
 
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
 	kn = kernfs_walk_ns(parent, path, ns);
 	kernfs_get(kn);
-	mutex_unlock(&kernfs_mutex);
+	up_read(&kernfs_rwsem);
 
 	return kn;
 }
@@ -1037,12 +1039,34 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
 	if (flags & LOOKUP_RCU)
 		return -ECHILD;
 
-	/* Always perform fresh lookup for negatives */
-	if (d_really_is_negative(dentry))
-		goto out_bad_unlocked;
+	/* Negative hashed dentry? */
+	if (d_really_is_negative(dentry)) {
+		struct kernfs_node *parent;
+
+		/* If the kernfs parent node has changed discard and
+		 * proceed to ->lookup.
+		 */
+		down_read(&kernfs_rwsem);
+		spin_lock(&dentry->d_lock);
+		parent = kernfs_dentry_node(dentry->d_parent);
+		if (parent) {
+			if (kernfs_dir_changed(parent, dentry)) {
+				spin_unlock(&dentry->d_lock);
+				up_read(&kernfs_rwsem);
+				return 0;
+			}
+		}
+		spin_unlock(&dentry->d_lock);
+		up_read(&kernfs_rwsem);
+
+		/* The kernfs parent node hasn't changed, leave the
+		 * dentry negative and return success.
+		 */
+		return 1;
+	}
 
 	kn = kernfs_dentry_node(dentry);
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
 
 	/* The kernfs node has been deactivated */
 	if (!kernfs_active(kn))
@@ -1061,11 +1085,10 @@ static int kernfs_dop_revalidate(struct dentry *dentry, unsigned int flags)
 	    kernfs_info(dentry->d_sb)->ns != kn->ns)
 		goto out_bad;
 
-	mutex_unlock(&kernfs_mutex);
+	up_read(&kernfs_rwsem);
 	return 1;
 out_bad:
-	mutex_unlock(&kernfs_mutex);
-out_bad_unlocked:
+	up_read(&kernfs_rwsem);
 	return 0;
 }
 
@@ -1077,37 +1100,29 @@ static struct dentry *kernfs_iop_lookup(struct inode *dir,
 					struct dentry *dentry,
 					unsigned int flags)
 {
-	struct dentry *ret;
 	struct kernfs_node *parent = dir->i_private;
 	struct kernfs_node *kn;
-	struct inode *inode;
+	struct inode *inode = NULL;
 	const void *ns = NULL;
 
-	mutex_lock(&kernfs_mutex);
-
+	down_read(&kernfs_rwsem);
 	if (kernfs_ns_enabled(parent))
 		ns = kernfs_info(dir->i_sb)->ns;
 
 	kn = kernfs_find_ns(parent, dentry->d_name.name, ns);
-
-	/* no such entry */
-	if (!kn || !kernfs_active(kn)) {
-		ret = NULL;
-		goto out_unlock;
-	}
-
 	/* attach dentry and inode */
-	inode = kernfs_get_inode(dir->i_sb, kn);
-	if (!inode) {
-		ret = ERR_PTR(-ENOMEM);
-		goto out_unlock;
+	if (kn && kernfs_active(kn)) {
+		inode = kernfs_get_inode(dir->i_sb, kn);
+		if (!inode)
+			inode = ERR_PTR(-ENOMEM);
 	}
+	/* Needed only for negative dentry validation */
+	if (!inode)
+		kernfs_set_rev(parent, dentry);
+	up_read(&kernfs_rwsem);
 
-	/* instantiate and hash dentry */
-	ret = d_splice_alias(inode, dentry);
- out_unlock:
-	mutex_unlock(&kernfs_mutex);
-	return ret;
+	/* instantiate and hash (possibly negative) dentry */
+	return d_splice_alias(inode, dentry);
 }
 
 static int kernfs_iop_mkdir(struct user_namespace *mnt_userns,
@@ -1227,7 +1242,7 @@ static struct kernfs_node *kernfs_next_descendant_post(struct kernfs_node *pos,
 {
 	struct rb_node *rbn;
 
-	lockdep_assert_held(&kernfs_mutex);
+	lockdep_assert_held_write(&kernfs_rwsem);
 
 	/* if first iteration, visit leftmost descendant which may be root */
 	if (!pos)
@@ -1263,7 +1278,7 @@ void kernfs_activate(struct kernfs_node *kn)
 {
 	struct kernfs_node *pos;
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 
 	pos = NULL;
 	while ((pos = kernfs_next_descendant_post(pos, kn))) {
@@ -1277,14 +1292,14 @@ void kernfs_activate(struct kernfs_node *kn)
 		pos->flags |= KERNFS_ACTIVATED;
 	}
 
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 }
 
 static void __kernfs_remove(struct kernfs_node *kn)
 {
 	struct kernfs_node *pos;
 
-	lockdep_assert_held(&kernfs_mutex);
+	lockdep_assert_held_write(&kernfs_rwsem);
 
 	/*
 	 * Short-circuit if non-root @kn has already finished removal.
@@ -1307,7 +1322,7 @@ static void __kernfs_remove(struct kernfs_node *kn)
 		pos = kernfs_leftmost_descendant(kn);
 
 		/*
-		 * kernfs_drain() drops kernfs_mutex temporarily and @pos's
+		 * kernfs_drain() drops kernfs_rwsem temporarily and @pos's
 		 * base ref could have been put by someone else by the time
 		 * the function returns.  Make sure it doesn't go away
 		 * underneath us.
@@ -1354,9 +1369,9 @@ static void __kernfs_remove(struct kernfs_node *kn)
  */
 void kernfs_remove(struct kernfs_node *kn)
 {
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 	__kernfs_remove(kn);
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 }
 
 /**
@@ -1443,17 +1458,17 @@ bool kernfs_remove_self(struct kernfs_node *kn)
 {
 	bool ret;
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 	kernfs_break_active_protection(kn);
 
 	/*
 	 * SUICIDAL is used to arbitrate among competing invocations.  Only
 	 * the first one will actually perform removal.  When the removal
 	 * is complete, SUICIDED is set and the active ref is restored
-	 * while holding kernfs_mutex.  The ones which lost arbitration
-	 * waits for SUICDED && drained which can happen only after the
-	 * enclosing kernfs operation which executed the winning instance
-	 * of kernfs_remove_self() finished.
+	 * while kernfs_rwsem for held exclusive.  The ones which lost
+	 * arbitration waits for SUICIDED && drained which can happen only
+	 * after the enclosing kernfs operation which executed the winning
+	 * instance of kernfs_remove_self() finished.
 	 */
 	if (!(kn->flags & KERNFS_SUICIDAL)) {
 		kn->flags |= KERNFS_SUICIDAL;
@@ -1471,9 +1486,9 @@ bool kernfs_remove_self(struct kernfs_node *kn)
 			    atomic_read(&kn->active) == KN_DEACTIVATED_BIAS)
 				break;
 
-			mutex_unlock(&kernfs_mutex);
+			up_write(&kernfs_rwsem);
 			schedule();
-			mutex_lock(&kernfs_mutex);
+			down_write(&kernfs_rwsem);
 		}
 		finish_wait(waitq, &wait);
 		WARN_ON_ONCE(!RB_EMPTY_NODE(&kn->rb));
@@ -1481,12 +1496,12 @@ bool kernfs_remove_self(struct kernfs_node *kn)
 	}
 
 	/*
-	 * This must be done while holding kernfs_mutex; otherwise, waiting
-	 * for SUICIDED && deactivated could finish prematurely.
+	 * This must be done while kernfs_rwsem held exclusive; otherwise,
+	 * waiting for SUICIDED && deactivated could finish prematurely.
 	 */
 	kernfs_unbreak_active_protection(kn);
 
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 	return ret;
 }
 
@@ -1510,13 +1525,13 @@ int kernfs_remove_by_name_ns(struct kernfs_node *parent, const char *name,
 		return -ENOENT;
 	}
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 
 	kn = kernfs_find_ns(parent, name, ns);
 	if (kn)
 		__kernfs_remove(kn);
 
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 
 	if (kn)
 		return 0;
@@ -1542,7 +1557,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
 	if (!kn->parent)
 		return -EINVAL;
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 
 	error = -ENOENT;
 	if (!kernfs_active(kn) || !kernfs_active(new_parent) ||
@@ -1596,7 +1611,7 @@ int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
 
 	error = 0;
  out:
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 	return error;
 }
 
@@ -1671,7 +1686,7 @@ static int kernfs_fop_readdir(struct file *file, struct dir_context *ctx)
 
 	if (!dir_emit_dots(file, ctx))
 		return 0;
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
 
 	if (kernfs_ns_enabled(parent))
 		ns = kernfs_info(dentry->d_sb)->ns;
@@ -1688,12 +1703,12 @@ static int kernfs_fop_readdir(struct file *file, struct dir_context *ctx)
 		file->private_data = pos;
 		kernfs_get(pos);
 
-		mutex_unlock(&kernfs_mutex);
+		up_read(&kernfs_rwsem);
 		if (!dir_emit(ctx, name, len, ino, type))
 			return 0;
-		mutex_lock(&kernfs_mutex);
+		down_read(&kernfs_rwsem);
 	}
-	mutex_unlock(&kernfs_mutex);
+	up_read(&kernfs_rwsem);
 	file->private_data = NULL;
 	ctx->pos = INT_MAX;
 	return 0;
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index c75719312147..60e2a86c535e 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -860,7 +860,7 @@ repeat:
 	spin_unlock_irq(&kernfs_notify_lock);
 
 	/* kick fsnotify */
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 
 	list_for_each_entry(info, &kernfs_root(kn)->supers, node) {
 		struct kernfs_node *parent;
@@ -898,7 +898,7 @@ repeat:
 		iput(inode);
 	}
 
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 	kernfs_put(kn);
 	goto repeat;
 }
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 26f2aa3586f9..c0eae1725435 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -100,9 +100,9 @@ int kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)
 {
 	int ret;
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 	ret = __kernfs_setattr(kn, iattr);
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 	return ret;
 }
 
@@ -116,7 +116,7 @@ int kernfs_iop_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
 	if (!kn)
 		return -EINVAL;
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 	error = setattr_prepare(&init_user_ns, dentry, iattr);
 	if (error)
 		goto out;
@@ -129,7 +129,7 @@ int kernfs_iop_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
 	setattr_copy(&init_user_ns, inode, iattr);
 
 out:
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 	return error;
 }
 
@@ -185,11 +185,13 @@ int kernfs_iop_getattr(struct user_namespace *mnt_userns,
 	struct inode *inode = d_inode(path->dentry);
 	struct kernfs_node *kn = inode->i_private;
 
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
+	spin_lock(&inode->i_lock);
 	kernfs_refresh_inode(kn, inode);
-	mutex_unlock(&kernfs_mutex);
-
 	generic_fillattr(&init_user_ns, inode, stat);
+	spin_unlock(&inode->i_lock);
+	up_read(&kernfs_rwsem);
+
 	return 0;
 }
 
@@ -272,17 +274,21 @@ int kernfs_iop_permission(struct user_namespace *mnt_userns,
 			  struct inode *inode, int mask)
 {
 	struct kernfs_node *kn;
+	int ret;
 
 	if (mask & MAY_NOT_BLOCK)
 		return -ECHILD;
 
 	kn = inode->i_private;
 
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
+	spin_lock(&inode->i_lock);
 	kernfs_refresh_inode(kn, inode);
-	mutex_unlock(&kernfs_mutex);
+	ret = generic_permission(&init_user_ns, inode, mask);
+	spin_unlock(&inode->i_lock);
+	up_read(&kernfs_rwsem);
 
-	return generic_permission(&init_user_ns, inode, mask);
+	return ret;
 }
 
 int kernfs_xattr_get(struct kernfs_node *kn, const char *name,
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index ccc3b44f6306..f9cc912c31e1 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -13,6 +13,7 @@
 #include <linux/lockdep.h>
 #include <linux/fs.h>
 #include <linux/mutex.h>
+#include <linux/rwsem.h>
 #include <linux/xattr.h>
 
 #include <linux/kernfs.h>
@@ -69,7 +70,7 @@ struct kernfs_super_info {
 	 */
 	const void		*ns;
 
-	/* anchored at kernfs_root->supers, protected by kernfs_mutex */
+	/* anchored at kernfs_root->supers, protected by kernfs_rwsem */
 	struct list_head	node;
 };
 #define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
@@ -81,6 +82,25 @@ static inline struct kernfs_node *kernfs_dentry_node(struct dentry *dentry)
 	return d_inode(dentry)->i_private;
 }
 
+static inline void kernfs_set_rev(struct kernfs_node *parent,
+				  struct dentry *dentry)
+{
+	dentry->d_time = parent->dir.rev;
+}
+
+static inline void kernfs_inc_rev(struct kernfs_node *parent)
+{
+	parent->dir.rev++;
+}
+
+static inline bool kernfs_dir_changed(struct kernfs_node *parent,
+				      struct dentry *dentry)
+{
+	if (parent->dir.rev != dentry->d_time)
+		return true;
+	return false;
+}
+
 extern const struct super_operations kernfs_sops;
 extern struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
 
@@ -102,7 +122,7 @@ int __kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr);
 /*
  * dir.c
  */
-extern struct mutex kernfs_mutex;
+extern struct rw_semaphore kernfs_rwsem;
 extern const struct dentry_operations kernfs_dops;
 extern const struct file_operations kernfs_dir_fops;
 extern const struct inode_operations kernfs_dir_iops;
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 9dc7e7a64e10..f2f909d09f52 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -255,9 +255,9 @@ static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *k
 	sb->s_shrink.seeks = 0;
 
 	/* get root inode, initialize and unlock it */
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
 	inode = kernfs_get_inode(sb, info->root->kn);
-	mutex_unlock(&kernfs_mutex);
+	up_read(&kernfs_rwsem);
 	if (!inode) {
 		pr_debug("kernfs: could not get root inode\n");
 		return -ENOMEM;
@@ -344,9 +344,9 @@ int kernfs_get_tree(struct fs_context *fc)
 		}
 		sb->s_flags |= SB_ACTIVE;
 
-		mutex_lock(&kernfs_mutex);
+		down_write(&kernfs_rwsem);
 		list_add(&info->node, &info->root->supers);
-		mutex_unlock(&kernfs_mutex);
+		up_write(&kernfs_rwsem);
 	}
 
 	fc->root = dget(sb->s_root);
@@ -372,9 +372,9 @@ void kernfs_kill_sb(struct super_block *sb)
 {
 	struct kernfs_super_info *info = kernfs_info(sb);
 
-	mutex_lock(&kernfs_mutex);
+	down_write(&kernfs_rwsem);
 	list_del(&info->node);
-	mutex_unlock(&kernfs_mutex);
+	up_write(&kernfs_rwsem);
 
 	/*
 	 * Remove the superblock from fs_supers/s_instances
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 5432883d819f..c8f8e41b8411 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -116,9 +116,9 @@ static int kernfs_getlink(struct inode *inode, char *path)
 	struct kernfs_node *target = kn->symlink.target_kn;
 	int error;
 
-	mutex_lock(&kernfs_mutex);
+	down_read(&kernfs_rwsem);
 	error = kernfs_get_target_path(parent, target, path);
-	mutex_unlock(&kernfs_mutex);
+	up_read(&kernfs_rwsem);
 
 	return error;
 }
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 9aefa7779b29..d019d6ac6ad0 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -174,8 +174,8 @@ static int sysfs_kf_bin_open(struct kernfs_open_file *of)
 {
 	struct bin_attribute *battr = of->kn->priv;
 
-	if (battr->mapping)
-		of->file->f_mapping = battr->mapping;
+	if (battr->f_mapping)
+		of->file->f_mapping = battr->f_mapping();
 
 	return 0;
 }
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 64e6a6698935..f29d62004527 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -446,7 +446,7 @@ int compat_only_sysfs_link_entry_to_kobj(struct kobject *kobj,
 	if (!target)
 		return -ENOENT;
 
-	entry = kernfs_find_and_get(target_kobj->sd, target_name);
+	entry = kernfs_find_and_get(target, target_name);
 	if (!entry) {
 		kernfs_put(target);
 		return -ENOENT;
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index a36cfcec4e77..37f36dad18bd 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -227,6 +227,12 @@ unsigned int bitmap_ord_to_pos(const unsigned long *bitmap, unsigned int ord, un
 int bitmap_print_to_pagebuf(bool list, char *buf,
 				   const unsigned long *maskp, int nmaskbits);
 
+extern int bitmap_print_bitmask_to_buf(char *buf, const unsigned long *maskp,
+				      int nmaskbits, loff_t off, size_t count);
+
+extern int bitmap_print_list_to_buf(char *buf, const unsigned long *maskp,
+				      int nmaskbits, loff_t off, size_t count);
+
 #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
 #define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))
 
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index f3689a52bfd0..5d4d07a9e1ed 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -983,6 +983,44 @@ cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask)
 				      nr_cpu_ids);
 }
 
+/**
+ * cpumap_print_bitmask_to_buf  - copies the cpumask into the buffer as
+ *	hex values of cpumask
+ *
+ * @buf: the buffer to copy into
+ * @mask: the cpumask to copy
+ * @off: in the string from which we are copying, we copy to @buf
+ * @count: the maximum number of bytes to print
+ *
+ * The function prints the cpumask into the buffer as hex values of
+ * cpumask; Typically used by bin_attribute to export cpumask bitmask
+ * ABI.
+ *
+ * Returns the length of how many bytes have been copied.
+ */
+static inline ssize_t
+cpumap_print_bitmask_to_buf(char *buf, const struct cpumask *mask,
+		loff_t off, size_t count)
+{
+	return bitmap_print_bitmask_to_buf(buf, cpumask_bits(mask),
+				   nr_cpu_ids, off, count);
+}
+
+/**
+ * cpumap_print_list_to_buf  - copies the cpumask into the buffer as
+ *	comma-separated list of cpus
+ *
+ * Everything is same with the above cpumap_print_bitmask_to_buf()
+ * except the print format.
+ */
+static inline ssize_t
+cpumap_print_list_to_buf(char *buf, const struct cpumask *mask,
+		loff_t off, size_t count)
+{
+	return bitmap_print_list_to_buf(buf, cpumask_bits(mask),
+				   nr_cpu_ids, off, count);
+}
+
 #if NR_CPUS <= BITS_PER_LONG
 #define CPU_MASK_ALL							\
 (cpumask_t) { {								\
diff --git a/include/linux/device/bus.h b/include/linux/device/bus.h
index 1ea5e1d1545b..062777a45a74 100644
--- a/include/linux/device/bus.h
+++ b/include/linux/device/bus.h
@@ -91,7 +91,7 @@ struct bus_type {
 	int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
 	int (*probe)(struct device *dev);
 	void (*sync_state)(struct device *dev);
-	int (*remove)(struct device *dev);
+	void (*remove)(struct device *dev);
 	void (*shutdown)(struct device *dev);
 
 	int (*online)(struct device *dev);
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 9e8ca8743c26..1093abf7c28c 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -98,6 +98,11 @@ struct kernfs_elem_dir {
 	 * better directly in kernfs_node but is here to save space.
 	 */
 	struct kernfs_root	*root;
+	/*
+	 * Monotonic revision counter, used to identify if a directory
+	 * node has changed during negative dentry revalidation.
+	 */
+	unsigned long		rev;
 };
 
 struct kernfs_elem_symlink {
@@ -188,7 +193,7 @@ struct kernfs_root {
 	u32			id_highbits;
 	struct kernfs_syscall_ops *syscall_ops;
 
-	/* list of kernfs_super_info of this root, protected by kernfs_mutex */
+	/* list of kernfs_super_info of this root, protected by kernfs_rwsem */
 	struct list_head	supers;
 
 	wait_queue_head_t	deactivate_waitq;
diff --git a/include/linux/nubus.h b/include/linux/nubus.h
index eba50b057f6f..392fc6c53e96 100644
--- a/include/linux/nubus.h
+++ b/include/linux/nubus.h
@@ -86,7 +86,7 @@ extern struct list_head nubus_func_rsrcs;
 struct nubus_driver {
 	struct device_driver driver;
 	int (*probe)(struct nubus_board *board);
-	int (*remove)(struct nubus_board *board);
+	void (*remove)(struct nubus_board *board);
 };
 
 extern struct bus_type nubus_bus_type;
diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h
index 2debc27ba95e..8292420426f3 100644
--- a/include/linux/pci-epf.h
+++ b/include/linux/pci-epf.h
@@ -85,7 +85,7 @@ struct pci_epf_ops {
  */
 struct pci_epf_driver {
 	int	(*probe)(struct pci_epf *epf);
-	int	(*remove)(struct pci_epf *epf);
+	void	(*remove)(struct pci_epf *epf);
 
 	struct device_driver	driver;
 	struct pci_epf_ops	*ops;
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index ed42ea9f60ba..7c96f169d274 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -197,8 +197,6 @@ extern int platform_device_add_resources(struct platform_device *pdev,
 					 unsigned int num);
 extern int platform_device_add_data(struct platform_device *pdev,
 				    const void *data, size_t size);
-extern int platform_device_add_properties(struct platform_device *pdev,
-				const struct property_entry *properties);
 extern int platform_device_add(struct platform_device *pdev);
 extern void platform_device_del(struct platform_device *pdev);
 extern void platform_device_put(struct platform_device *pdev);
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index a12556a4b93a..e3f1e8ac1f85 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -176,7 +176,7 @@ struct bin_attribute {
 	struct attribute	attr;
 	size_t			size;
 	void			*private;
-	struct address_space	*mapping;
+	struct address_space *(*f_mapping)(void);
 	ssize_t (*read)(struct file *, struct kobject *, struct bin_attribute *,
 			char *, loff_t, size_t);
 	ssize_t (*write)(struct file *, struct kobject *, struct bin_attribute *,
diff --git a/include/linux/zorro.h b/include/linux/zorro.h
index e2e4de188d84..db7416ed6057 100644
--- a/include/linux/zorro.h
+++ b/include/linux/zorro.h
@@ -29,7 +29,6 @@
 struct zorro_dev {
     struct ExpansionRom rom;
     zorro_id id;
-    struct zorro_driver *driver;	/* which driver has allocated this device */
     struct device dev;			/* Generic device interface */
     u16 slotaddr;
     u16 slotsize;
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 9401d39e4722..663dd81967d4 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -487,6 +487,127 @@ int bitmap_print_to_pagebuf(bool list, char *buf, const unsigned long *maskp,
 }
 EXPORT_SYMBOL(bitmap_print_to_pagebuf);
 
+/**
+ * bitmap_print_to_buf  - convert bitmap to list or hex format ASCII string
+ * @list: indicates whether the bitmap must be list
+ *      true:  print in decimal list format
+ *      false: print in hexadecimal bitmask format
+ */
+static int bitmap_print_to_buf(bool list, char *buf, const unsigned long *maskp,
+		int nmaskbits, loff_t off, size_t count)
+{
+	const char *fmt = list ? "%*pbl\n" : "%*pb\n";
+	ssize_t size;
+	void *data;
+
+	data = kasprintf(GFP_KERNEL, fmt, nmaskbits, maskp);
+	if (!data)
+		return -ENOMEM;
+
+	size = memory_read_from_buffer(buf, count, &off, data, strlen(data) + 1);
+	kfree(data);
+
+	return size;
+}
+
+/**
+ * bitmap_print_bitmask_to_buf  - convert bitmap to hex bitmask format ASCII string
+ *
+ * The bitmap_print_to_pagebuf() is used indirectly via its cpumap wrapper
+ * cpumap_print_to_pagebuf() or directly by drivers to export hexadecimal
+ * bitmask and decimal list to userspace by sysfs ABI.
+ * Drivers might be using a normal attribute for this kind of ABIs. A
+ * normal attribute typically has show entry as below:
+ * static ssize_t example_attribute_show(struct device *dev,
+ * 		struct device_attribute *attr, char *buf)
+ * {
+ * 	...
+ * 	return bitmap_print_to_pagebuf(true, buf, &mask, nr_trig_max);
+ * }
+ * show entry of attribute has no offset and count parameters and this
+ * means the file is limited to one page only.
+ * bitmap_print_to_pagebuf() API works terribly well for this kind of
+ * normal attribute with buf parameter and without offset, count:
+ * bitmap_print_to_pagebuf(bool list, char *buf, const unsigned long *maskp,
+ * 			   int nmaskbits)
+ * {
+ * }
+ * The problem is once we have a large bitmap, we have a chance to get a
+ * bitmask or list more than one page. Especially for list, it could be
+ * as complex as 0,3,5,7,9,... We have no simple way to know it exact size.
+ * It turns out bin_attribute is a way to break this limit. bin_attribute
+ * has show entry as below:
+ * static ssize_t
+ * example_bin_attribute_show(struct file *filp, struct kobject *kobj,
+ * 		struct bin_attribute *attr, char *buf,
+ * 		loff_t offset, size_t count)
+ * {
+ * 	...
+ * }
+ * With the new offset and count parameters, this makes sysfs ABI be able
+ * to support file size more than one page. For example, offset could be
+ * >= 4096.
+ * bitmap_print_bitmask_to_buf(), bitmap_print_list_to_buf() wit their
+ * cpumap wrapper cpumap_print_bitmask_to_buf(), cpumap_print_list_to_buf()
+ * make those drivers be able to support large bitmask and list after they
+ * move to use bin_attribute. In result, we have to pass the corresponding
+ * parameters such as off, count from bin_attribute show entry to this API.
+ *
+ * @buf: buffer into which string is placed
+ * @maskp: pointer to bitmap to convert
+ * @nmaskbits: size of bitmap, in bits
+ * @off: in the string from which we are copying, We copy to @buf
+ * @count: the maximum number of bytes to print
+ *
+ * The role of cpumap_print_bitmask_to_buf() and cpumap_print_list_to_buf()
+ * is similar with cpumap_print_to_pagebuf(),  the difference is that
+ * bitmap_print_to_pagebuf() mainly serves sysfs attribute with the assumption
+ * the destination buffer is exactly one page and won't be more than one page.
+ * cpumap_print_bitmask_to_buf() and cpumap_print_list_to_buf(), on the other
+ * hand, mainly serves bin_attribute which doesn't work with exact one page,
+ * and it can break the size limit of converted decimal list and hexadecimal
+ * bitmask.
+ *
+ * WARNING!
+ *
+ * This function is not a replacement for sprintf() or bitmap_print_to_pagebuf().
+ * It is intended to workaround sysfs limitations discussed above and should be
+ * used carefully in general case for the following reasons:
+ *  - Time complexity is O(nbits^2/count), comparing to O(nbits) for snprintf().
+ *  - Memory complexity is O(nbits), comparing to O(1) for snprintf().
+ *  - @off and @count are NOT offset and number of bits to print.
+ *  - If printing part of bitmap as list, the resulting string is not a correct
+ *    list representation of bitmap. Particularly, some bits within or out of
+ *    related interval may be erroneously set or unset. The format of the string
+ *    may be broken, so bitmap_parselist-like parser may fail parsing it.
+ *  - If printing the whole bitmap as list by parts, user must ensure the order
+ *    of calls of the function such that the offset is incremented linearly.
+ *  - If printing the whole bitmap as list by parts, user must keep bitmap
+ *    unchanged between the very first and very last call. Otherwise concatenated
+ *    result may be incorrect, and format may be broken.
+ *
+ * Returns the number of characters actually printed to @buf
+ */
+int bitmap_print_bitmask_to_buf(char *buf, const unsigned long *maskp,
+				int nmaskbits, loff_t off, size_t count)
+{
+	return bitmap_print_to_buf(false, buf, maskp, nmaskbits, off, count);
+}
+EXPORT_SYMBOL(bitmap_print_bitmask_to_buf);
+
+/**
+ * bitmap_print_list_to_buf  - convert bitmap to decimal list format ASCII string
+ *
+ * Everything is same with the above bitmap_print_bitmask_to_buf() except
+ * the print format.
+ */
+int bitmap_print_list_to_buf(char *buf, const unsigned long *maskp,
+			     int nmaskbits, loff_t off, size_t count)
+{
+	return bitmap_print_to_buf(true, buf, maskp, nmaskbits, off, count);
+}
+EXPORT_SYMBOL(bitmap_print_list_to_buf);
+
 /*
  * Region 9-38:4/10 describes the following bitmap structure:
  * 0	   9  12    18			38	     N
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
index 4ea73f5aed41..d33fa5a61b95 100644
--- a/lib/test_bitmap.c
+++ b/lib/test_bitmap.c
@@ -19,6 +19,7 @@
 KSTM_MODULE_GLOBALS();
 
 static char pbl_buffer[PAGE_SIZE] __initdata;
+static char print_buf[PAGE_SIZE * 2] __initdata;
 
 static const unsigned long exp1[] __initconst = {
 	BITMAP_FROM_U64(1),
@@ -156,6 +157,20 @@ static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
 	return true;
 }
 
+static bool __init
+__check_eq_str(const char *srcfile, unsigned int line,
+		const char *exp_str, const char *str,
+		unsigned int len)
+{
+	bool eq;
+
+	eq = strncmp(exp_str, str, len) == 0;
+	if (!eq)
+		pr_err("[%s:%u] expected %s, got %s\n", srcfile, line, exp_str, str);
+
+	return eq;
+}
+
 #define __expect_eq(suffix, ...)					\
 	({								\
 		int result = 0;						\
@@ -173,6 +188,7 @@ static bool __init __check_eq_clump8(const char *srcfile, unsigned int line,
 #define expect_eq_pbl(...)		__expect_eq(pbl, ##__VA_ARGS__)
 #define expect_eq_u32_array(...)	__expect_eq(u32_array, ##__VA_ARGS__)
 #define expect_eq_clump8(...)		__expect_eq(clump8, ##__VA_ARGS__)
+#define expect_eq_str(...)		__expect_eq(str, ##__VA_ARGS__)
 
 static void __init test_zero_clear(void)
 {
@@ -660,6 +676,139 @@ static void __init test_bitmap_cut(void)
 	}
 }
 
+struct test_bitmap_print {
+	const unsigned long *bitmap;
+	unsigned long nbits;
+	const char *mask;
+	const char *list;
+};
+
+static const unsigned long small_bitmap[] __initconst = {
+	BITMAP_FROM_U64(0x3333333311111111ULL),
+};
+
+static const char small_mask[] __initconst = "33333333,11111111\n";
+static const char small_list[] __initconst = "0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61\n";
+
+static const unsigned long large_bitmap[] __initconst = {
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+	BITMAP_FROM_U64(0x3333333311111111ULL), BITMAP_FROM_U64(0x3333333311111111ULL),
+};
+
+static const char large_mask[] __initconst = "33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111,"
+					"33333333,11111111,33333333,11111111\n";
+
+static const char large_list[] __initconst = /* more than 4KB */
+	"0,4,8,12,16,20,24,28,32-33,36-37,40-41,44-45,48-49,52-53,56-57,60-61,64,68,72,76,80,84,88,92,96-97,100-101,104-1"
+	"05,108-109,112-113,116-117,120-121,124-125,128,132,136,140,144,148,152,156,160-161,164-165,168-169,172-173,176-1"
+	"77,180-181,184-185,188-189,192,196,200,204,208,212,216,220,224-225,228-229,232-233,236-237,240-241,244-245,248-2"
+	"49,252-253,256,260,264,268,272,276,280,284,288-289,292-293,296-297,300-301,304-305,308-309,312-313,316-317,320,3"
+	"24,328,332,336,340,344,348,352-353,356-357,360-361,364-365,368-369,372-373,376-377,380-381,384,388,392,396,400,4"
+	"04,408,412,416-417,420-421,424-425,428-429,432-433,436-437,440-441,444-445,448,452,456,460,464,468,472,476,480-4"
+	"81,484-485,488-489,492-493,496-497,500-501,504-505,508-509,512,516,520,524,528,532,536,540,544-545,548-549,552-5"
+	"53,556-557,560-561,564-565,568-569,572-573,576,580,584,588,592,596,600,604,608-609,612-613,616-617,620-621,624-6"
+	"25,628-629,632-633,636-637,640,644,648,652,656,660,664,668,672-673,676-677,680-681,684-685,688-689,692-693,696-6"
+	"97,700-701,704,708,712,716,720,724,728,732,736-737,740-741,744-745,748-749,752-753,756-757,760-761,764-765,768,7"
+	"72,776,780,784,788,792,796,800-801,804-805,808-809,812-813,816-817,820-821,824-825,828-829,832,836,840,844,848,8"
+	"52,856,860,864-865,868-869,872-873,876-877,880-881,884-885,888-889,892-893,896,900,904,908,912,916,920,924,928-9"
+	"29,932-933,936-937,940-941,944-945,948-949,952-953,956-957,960,964,968,972,976,980,984,988,992-993,996-997,1000-"
+	"1001,1004-1005,1008-1009,1012-1013,1016-1017,1020-1021,1024,1028,1032,1036,1040,1044,1048,1052,1056-1057,1060-10"
+	"61,1064-1065,1068-1069,1072-1073,1076-1077,1080-1081,1084-1085,1088,1092,1096,1100,1104,1108,1112,1116,1120-1121"
+	",1124-1125,1128-1129,1132-1133,1136-1137,1140-1141,1144-1145,1148-1149,1152,1156,1160,1164,1168,1172,1176,1180,1"
+	"184-1185,1188-1189,1192-1193,1196-1197,1200-1201,1204-1205,1208-1209,1212-1213,1216,1220,1224,1228,1232,1236,124"
+	"0,1244,1248-1249,1252-1253,1256-1257,1260-1261,1264-1265,1268-1269,1272-1273,1276-1277,1280,1284,1288,1292,1296,"
+	"1300,1304,1308,1312-1313,1316-1317,1320-1321,1324-1325,1328-1329,1332-1333,1336-1337,1340-1341,1344,1348,1352,13"
+	"56,1360,1364,1368,1372,1376-1377,1380-1381,1384-1385,1388-1389,1392-1393,1396-1397,1400-1401,1404-1405,1408,1412"
+	",1416,1420,1424,1428,1432,1436,1440-1441,1444-1445,1448-1449,1452-1453,1456-1457,1460-1461,1464-1465,1468-1469,1"
+	"472,1476,1480,1484,1488,1492,1496,1500,1504-1505,1508-1509,1512-1513,1516-1517,1520-1521,1524-1525,1528-1529,153"
+	"2-1533,1536,1540,1544,1548,1552,1556,1560,1564,1568-1569,1572-1573,1576-1577,1580-1581,1584-1585,1588-1589,1592-"
+	"1593,1596-1597,1600,1604,1608,1612,1616,1620,1624,1628,1632-1633,1636-1637,1640-1641,1644-1645,1648-1649,1652-16"
+	"53,1656-1657,1660-1661,1664,1668,1672,1676,1680,1684,1688,1692,1696-1697,1700-1701,1704-1705,1708-1709,1712-1713"
+	",1716-1717,1720-1721,1724-1725,1728,1732,1736,1740,1744,1748,1752,1756,1760-1761,1764-1765,1768-1769,1772-1773,1"
+	"776-1777,1780-1781,1784-1785,1788-1789,1792,1796,1800,1804,1808,1812,1816,1820,1824-1825,1828-1829,1832-1833,183"
+	"6-1837,1840-1841,1844-1845,1848-1849,1852-1853,1856,1860,1864,1868,1872,1876,1880,1884,1888-1889,1892-1893,1896-"
+	"1897,1900-1901,1904-1905,1908-1909,1912-1913,1916-1917,1920,1924,1928,1932,1936,1940,1944,1948,1952-1953,1956-19"
+	"57,1960-1961,1964-1965,1968-1969,1972-1973,1976-1977,1980-1981,1984,1988,1992,1996,2000,2004,2008,2012,2016-2017"
+	",2020-2021,2024-2025,2028-2029,2032-2033,2036-2037,2040-2041,2044-2045,2048,2052,2056,2060,2064,2068,2072,2076,2"
+	"080-2081,2084-2085,2088-2089,2092-2093,2096-2097,2100-2101,2104-2105,2108-2109,2112,2116,2120,2124,2128,2132,213"
+	"6,2140,2144-2145,2148-2149,2152-2153,2156-2157,2160-2161,2164-2165,2168-2169,2172-2173,2176,2180,2184,2188,2192,"
+	"2196,2200,2204,2208-2209,2212-2213,2216-2217,2220-2221,2224-2225,2228-2229,2232-2233,2236-2237,2240,2244,2248,22"
+	"52,2256,2260,2264,2268,2272-2273,2276-2277,2280-2281,2284-2285,2288-2289,2292-2293,2296-2297,2300-2301,2304,2308"
+	",2312,2316,2320,2324,2328,2332,2336-2337,2340-2341,2344-2345,2348-2349,2352-2353,2356-2357,2360-2361,2364-2365,2"
+	"368,2372,2376,2380,2384,2388,2392,2396,2400-2401,2404-2405,2408-2409,2412-2413,2416-2417,2420-2421,2424-2425,242"
+	"8-2429,2432,2436,2440,2444,2448,2452,2456,2460,2464-2465,2468-2469,2472-2473,2476-2477,2480-2481,2484-2485,2488-"
+	"2489,2492-2493,2496,2500,2504,2508,2512,2516,2520,2524,2528-2529,2532-2533,2536-2537,2540-2541,2544-2545,2548-25"
+	"49,2552-2553,2556-2557\n";
+
+static const struct test_bitmap_print test_print[] __initconst = {
+	{ small_bitmap, sizeof(small_bitmap) * BITS_PER_BYTE, small_mask, small_list },
+	{ large_bitmap, sizeof(large_bitmap) * BITS_PER_BYTE, large_mask, large_list },
+};
+
+static void __init test_bitmap_print_buf(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(test_print); i++) {
+		const struct test_bitmap_print *t = &test_print[i];
+		int n;
+
+		n = bitmap_print_bitmask_to_buf(print_buf, t->bitmap, t->nbits,
+						0, 2 * PAGE_SIZE);
+		expect_eq_uint(strlen(t->mask) + 1, n);
+		expect_eq_str(t->mask, print_buf, n);
+
+		n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
+					     0, 2 * PAGE_SIZE);
+		expect_eq_uint(strlen(t->list) + 1, n);
+		expect_eq_str(t->list, print_buf, n);
+
+		/* test by non-zero offset */
+		if (strlen(t->list) > PAGE_SIZE) {
+			n = bitmap_print_list_to_buf(print_buf, t->bitmap, t->nbits,
+						     PAGE_SIZE, PAGE_SIZE);
+			expect_eq_uint(strlen(t->list) + 1 - PAGE_SIZE, n);
+			expect_eq_str(t->list + PAGE_SIZE, print_buf, n);
+		}
+	}
+}
+
 static void __init selftest(void)
 {
 	test_zero_clear();
@@ -672,6 +821,7 @@ static void __init selftest(void)
 	test_mem_optimisations();
 	test_for_each_set_clump8();
 	test_bitmap_cut();
+	test_bitmap_print_buf();
 }
 
 KSTM_MODULE_LOADERS(test_bitmap);
diff --git a/sound/ac97/bus.c b/sound/ac97/bus.c
index 6ddf646cda65..0d31a6d71468 100644
--- a/sound/ac97/bus.c
+++ b/sound/ac97/bus.c
@@ -514,7 +514,7 @@ static int ac97_bus_probe(struct device *dev)
 	return ret;
 }
 
-static int ac97_bus_remove(struct device *dev)
+static void ac97_bus_remove(struct device *dev)
 {
 	struct ac97_codec_device *adev = to_ac97_device(dev);
 	struct ac97_codec_driver *adrv = to_ac97_driver(dev->driver);
@@ -522,7 +522,7 @@ static int ac97_bus_remove(struct device *dev)
 
 	ret = pm_runtime_resume_and_get(dev);
 	if (ret < 0)
-		return ret;
+		return;
 
 	ret = adrv->remove(adev);
 	pm_runtime_put_noidle(dev);
@@ -530,8 +530,6 @@ static int ac97_bus_remove(struct device *dev)
 		ac97_put_disable_clk(adev);
 
 	pm_runtime_disable(dev);
-
-	return ret;
 }
 
 static struct bus_type ac97_bus_type = {
diff --git a/sound/aoa/soundbus/core.c b/sound/aoa/soundbus/core.c
index 002fb5bf220b..c9579d97fbab 100644
--- a/sound/aoa/soundbus/core.c
+++ b/sound/aoa/soundbus/core.c
@@ -104,7 +104,7 @@ static int soundbus_uevent(struct device *dev, struct kobj_uevent_env *env)
 	return retval;
 }
 
-static int soundbus_device_remove(struct device *dev)
+static void soundbus_device_remove(struct device *dev)
 {
 	struct soundbus_dev * soundbus_dev = to_soundbus_device(dev);
 	struct soundbus_driver * drv = to_soundbus_driver(dev->driver);
@@ -112,8 +112,6 @@ static int soundbus_device_remove(struct device *dev)
 	if (dev->driver && drv->remove)
 		drv->remove(soundbus_dev);
 	soundbus_dev_put(soundbus_dev);
-
-	return 0;
 }
 
 static void soundbus_device_shutdown(struct device *dev)
diff --git a/tools/testing/selftests/firmware/fw_namespace.c b/tools/testing/selftests/firmware/fw_namespace.c
index 0e393cb5f42d..4c6f0cd83c5b 100644
--- a/tools/testing/selftests/firmware/fw_namespace.c
+++ b/tools/testing/selftests/firmware/fw_namespace.c
@@ -129,7 +129,8 @@ int main(int argc, char **argv)
 		die("mounting tmpfs to /lib/firmware failed\n");
 
 	sys_path = argv[1];
-	asprintf(&fw_path, "/lib/firmware/%s", fw_name);
+	if (asprintf(&fw_path, "/lib/firmware/%s", fw_name) < 0)
+		die("error: failed to build full fw_path\n");
 
 	setup_fw(fw_path);
author	Linus Torvalds <torvalds@linux-foundation.org>	2021-09-01 17:44:42 +0200
committer	Linus Torvalds <torvalds@linux-foundation.org>	2021-09-01 17:44:42 +0200
commit	c6c3c5704ba70820f6b632982abde06661b7222a (patch)
tree	731e00452853789a90d9333508074e95ea1dc012
parent	Merge tag 'char-misc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff)
parent	MAINTAINERS: Add dri-devel for component.[hc] (diff)
download	linux-c6c3c5704ba70820f6b632982abde06661b7222a.tar.xz linux-c6c3c5704ba70820f6b632982abde06661b7222a.zip