Merge tag 'driver-core-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the large set of driver core changes for 6.3-rc1.

  There's a lot of changes this development cycle, most of the work
  falls into two different categories:

   - fw_devlink fixes and updates. This has gone through numerous review
     cycles and lots of review and testing by lots of different devices.
     Hopefully all should be good now, and Saravana will be keeping a
     watch for any potential regression on odd embedded systems.

   - driver core changes to work to make struct bus_type able to be
     moved into read-only memory (i.e. const) The recent work with Rust
     has pointed out a number of areas in the driver core where we are
     passing around and working with structures that really do not have
     to be dynamic at all, and they should be able to be read-only
     making things safer overall. This is the contuation of that work
     (started last release with kobject changes) in moving struct
     bus_type to be constant. We didn't quite make it for this release,
     but the remaining patches will be finished up for the release after
     this one, but the groundwork has been laid for this effort.

  Other than that we have in here:

   - debugfs memory leak fixes in some subsystems

   - error path cleanups and fixes for some never-able-to-be-hit
     codepaths.

   - cacheinfo rework and fixes

   - Other tiny fixes, full details are in the shortlog

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

[ Geert Uytterhoeven points out that that last sentence isn't true, and
  that there's a pending report that has a fix that is queued up - Linus ]

* tag 'driver-core-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (124 commits)
  debugfs: drop inline constant formatting for ERR_PTR(-ERROR)
  OPP: fix error checking in opp_migrate_dentry()
  debugfs: update comment of debugfs_rename()
  i3c: fix device.h kernel-doc warnings
  dma-mapping: no need to pass a bus_type into get_arch_dma_ops()
  driver core: class: move EXPORT_SYMBOL_GPL() lines to the correct place
  Revert "driver core: add error handling for devtmpfs_create_node()"
  Revert "devtmpfs: add debug info to handle()"
  Revert "devtmpfs: remove return value of devtmpfs_delete_node()"
  driver core: cpu: don't hand-override the uevent bus_type callback.
  devtmpfs: remove return value of devtmpfs_delete_node()
  devtmpfs: add debug info to handle()
  driver core: add error handling for devtmpfs_create_node()
  driver core: bus: update my copyright notice
  driver core: bus: add bus_get_dev_root() function
  driver core: bus: constify bus_unregister()
  driver core: bus: constify some internal functions
  driver core: bus: constify bus_get_kset()
  driver core: bus: constify bus_register/unregister_notifier()
  driver core: remove private pointer from struct bus_type
  ...

Author: torvalds

Documentation/ABI/testing/sysfs-kernel-address_bits

@@ -0,0 +1,10 @@
+What:		/sys/kernel/address_bit
+Date:		May 2023
+KernelVersion:	6.3
+Contact:	Thomas Weißschuh <[email protected]>
+Description:
+		The address size of the running kernel in bits.
+
+		Access: Read
+
+Users:		util-linux

Documentation/process/embargoed-hardware-issues.rst

@@ -251,6 +251,7 @@ an involved disclosed party. The current ambassadors list:
   IBM Z		Christian Borntraeger <[email protected]>
   Intel		Tony Luck <[email protected]>
   Qualcomm	Trilok Soni <[email protected]>
+  Samsung	Javier González <[email protected]>
 
   Microsoft	James Morris <[email protected]>
   VMware

arch/alpha/include/asm/dma-mapping.h

@@ -4,7 +4,7 @@
 
 extern const struct dma_map_ops alpha_pci_ops;
 
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
+static inline const struct dma_map_ops *get_arch_dma_ops(void)
 {
 #ifdef CONFIG_ALPHA_JENSEN
 	return NULL;

arch/arm64/kernel/cacheinfo.c

@@ -46,7 +46,7 @@ static void ci_leaf_init(struct cacheinfo *this_leaf,
 int init_cache_level(unsigned int cpu)
 {
 	unsigned int ctype, level, leaves;
-	int fw_level;
+	int fw_level, ret;
 	struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
 
 	for (level = 1, leaves = 0; level <= MAX_CACHE_LEVEL; level++) {
@@ -59,13 +59,13 @@ int init_cache_level(unsigned int cpu)
 		leaves += (ctype == CACHE_TYPE_SEPARATE) ? 2 : 1;
 	}
 
-	if (acpi_disabled)
+	if (acpi_disabled) {
 		fw_level = of_find_last_cache_level(cpu);
-	else
-		fw_level = acpi_find_last_cache_level(cpu);
-
-	if (fw_level < 0)
-		return fw_level;
+	} else {
+		ret = acpi_get_cache_info(cpu, &fw_level, NULL);
+		if (ret < 0)
+			fw_level = 0;
+	}
 
 	if (level < fw_level) {
 		/*

arch/ia64/include/asm/dma-mapping.h

@@ -8,7 +8,7 @@
  */
 extern const struct dma_map_ops *dma_ops;
 
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
+static inline const struct dma_map_ops *get_arch_dma_ops(void)
 {
 	return dma_ops;
 }

arch/mips/include/asm/dma-mapping.h

@@ -6,7 +6,7 @@
 
 extern const struct dma_map_ops jazz_dma_ops;
 
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
+static inline const struct dma_map_ops *get_arch_dma_ops(void)
 {
 #if defined(CONFIG_MACH_JAZZ)
 	return &jazz_dma_ops;

arch/mips/sgi-ip22/ip22-gio.c

@@ -199,9 +199,9 @@ static struct attribute *gio_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(gio_dev);
 
-static int gio_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int gio_device_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct gio_device *gio_dev = to_gio_device(dev);
+	const struct gio_device *gio_dev = to_gio_device(dev);
 
 	add_uevent_var(env, "MODALIAS=gio:%x", gio_dev->id.id);
 	return 0;

arch/parisc/include/asm/dma-mapping.h

@@ -21,7 +21,7 @@
 
 extern const struct dma_map_ops *hppa_dma_ops;
 
-static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
+static inline const struct dma_map_ops *get_arch_dma_ops(void)
 {
 	return hppa_dma_ops;
 }

arch/parisc/kernel/drivers.c

@@ -552,7 +552,7 @@ static int parisc_generic_match(struct device *dev, struct device_driver *drv)
 	return match_device(to_parisc_driver(drv), to_parisc_device(dev));
 }
 
-static ssize_t make_modalias(struct device *dev, char *buf)
+static ssize_t make_modalias(const struct device *dev, char *buf)
 {
 	const struct parisc_device *padev = to_parisc_device(dev);
 	const struct parisc_device_id *id = &padev->id;
@@ -562,7 +562,7 @@ static ssize_t make_modalias(struct device *dev, char *buf)
 		(u32)id->sversion);
 }
 
-static int parisc_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int parisc_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	const struct parisc_device *padev;
 	char modalias[40];

arch/powerpc/include/asm/ps3.h

@@ -396,7 +396,7 @@ static inline struct ps3_system_bus_driver *ps3_drv_to_system_bus_drv(
 	return container_of(_drv, struct ps3_system_bus_driver, core);
 }
 static inline struct ps3_system_bus_device *ps3_dev_to_system_bus_dev(
-	struct device *_dev)
+	const struct device *_dev)
 {
 	return container_of(_dev, struct ps3_system_bus_device, core);
 }