Merge tag 'driver-core-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the set of driver core and kernfs changes for 6.2-rc1.

  The "big" change in here is the addition of a new macro,
  container_of_const() that will preserve the "const-ness" of a pointer
  passed into it.

  The "problem" of the current container_of() macro is that if you pass
  in a "const *", out of it can comes a non-const pointer unless you
  specifically ask for it. For many usages, we want to preserve the
  "const" attribute by using the same call. For a specific example, this
  series changes the kobj_to_dev() macro to use it, allowing it to be
  used no matter what the const value is. This prevents every subsystem
  from having to declare 2 different individual macros (i.e.
  kobj_const_to_dev() and kobj_to_dev()) and having the compiler enforce
  the const value at build time, which having 2 macros would not do
  either.

  The driver for all of this have been discussions with the Rust kernel
  developers as to how to properly mark driver core, and kobject,
  objects as being "non-mutable". The changes to the kobject and driver
  core in this pull request are the result of that, as there are lots of
  paths where kobjects and device pointers are not modified at all, so
  marking them as "const" allows the compiler to enforce this.

  So, a nice side affect of the Rust development effort has been already
  to clean up the driver core code to be more obvious about object
  rules.

  All of this has been bike-shedded in quite a lot of detail on lkml
  with different names and implementations resulting in the tiny version
  we have in here, much better than my original proposal. Lots of
  subsystem maintainers have acked the changes as well.

  Other than this change, included in here are smaller stuff like:

   - kernfs fixes and updates to handle lock contention better

   - vmlinux.lds.h fixes and updates

   - sysfs and debugfs documentation updates

   - device property updates

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

* tag 'driver-core-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (58 commits)
  device property: Fix documentation for fwnode_get_next_parent()
  firmware_loader: fix up to_fw_sysfs() to preserve const
  usb.h: take advantage of container_of_const()
  device.h: move kobj_to_dev() to use container_of_const()
  container_of: add container_of_const() that preserves const-ness of the pointer
  driver core: fix up missed drivers/s390/char/hmcdrv_dev.c class.devnode() conversion.
  driver core: fix up missed scsi/cxlflash class.devnode() conversion.
  driver core: fix up some missing class.devnode() conversions.
  driver core: make struct class.devnode() take a const *
  driver core: make struct class.dev_uevent() take a const *
  cacheinfo: Remove of_node_put() for fw_token
  device property: Add a blank line in Kconfig of tests
  device property: Rename goto label to be more precise
  device property: Move PROPERTY_ENTRY_BOOL() a bit down
  device property: Get rid of __PROPERTY_ENTRY_ARRAY_EL*SIZE*()
  kernfs: fix all kernel-doc warnings and multiple typos
  driver core: pass a const * into of_device_uevent()
  kobject: kset_uevent_ops: make name() callback take a const *
  kobject: kset_uevent_ops: make filter() callback take a const *
  kobject: make kobject_namespace take a const *
  ...

6 files changed, 19 insertions, 19 deletions

diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c
index 0fdbdfd19474..466353b3dde4 100644
--- a/net/atm/atm_sysfs.c
+++ b/net/atm/atm_sysfs.c
@@ -108,9 +108,9 @@ static struct device_attribute *atm_attrs[] = {
 };
 
 
-static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env)
+static int atm_uevent(const struct device *cdev, struct kobj_uevent_env *env)
 {
-	struct atm_dev *adev;
+	const struct atm_dev *adev;
 
 	if (!cdev)
 		return -ENODEV;
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 228fd5b20f10..ad13b48e3e08 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -262,7 +262,7 @@ static void release_nbp(struct kobject *kobj)
 	kfree(p);
 }
 
-static void brport_get_ownership(struct kobject *kobj, kuid_t *uid, kgid_t *gid)
+static void brport_get_ownership(const struct kobject *kobj, kuid_t *uid, kgid_t *gid)
 {
 	struct net_bridge_port *p = kobj_to_brport(kobj);
 
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 679b84cc8794..ca55dd747d6c 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1020,7 +1020,7 @@ static void rx_queue_release(struct kobject *kobj)
 	netdev_put(queue->dev, &queue->dev_tracker);
 }
 
-static const void *rx_queue_namespace(struct kobject *kobj)
+static const void *rx_queue_namespace(const struct kobject *kobj)
 {
 	struct netdev_rx_queue *queue = to_rx_queue(kobj);
 	struct device *dev = &queue->dev->dev;
@@ -1032,7 +1032,7 @@ static const void *rx_queue_namespace(struct kobject *kobj)
 	return ns;
 }
 
-static void rx_queue_get_ownership(struct kobject *kobj,
+static void rx_queue_get_ownership(const struct kobject *kobj,
 				   kuid_t *uid, kgid_t *gid)
 {
 	const struct net *net = rx_queue_namespace(kobj);
@@ -1623,7 +1623,7 @@ static void netdev_queue_release(struct kobject *kobj)
 	netdev_put(queue->dev, &queue->dev_tracker);
 }
 
-static const void *netdev_queue_namespace(struct kobject *kobj)
+static const void *netdev_queue_namespace(const struct kobject *kobj)
 {
 	struct netdev_queue *queue = to_netdev_queue(kobj);
 	struct device *dev = &queue->dev->dev;
@@ -1635,7 +1635,7 @@ static const void *netdev_queue_namespace(struct kobject *kobj)
 	return ns;
 }
 
-static void netdev_queue_get_ownership(struct kobject *kobj,
+static void netdev_queue_get_ownership(const struct kobject *kobj,
 				       kuid_t *uid, kgid_t *gid)
 {
 	const struct net *net = netdev_queue_namespace(kobj);
@@ -1873,9 +1873,9 @@ const struct kobj_ns_type_operations net_ns_type_operations = {
 };
 EXPORT_SYMBOL_GPL(net_ns_type_operations);
 
-static int netdev_uevent(struct device *d, struct kobj_uevent_env *env)
+static int netdev_uevent(const struct device *d, struct kobj_uevent_env *env)
 {
-	struct net_device *dev = to_net_dev(d);
+	const struct net_device *dev = to_net_dev(d);
 	int retval;
 
 	/* pass interface to uevent. */
@@ -1910,16 +1910,16 @@ static void netdev_release(struct device *d)
 	netdev_freemem(dev);
 }
 
-static const void *net_namespace(struct device *d)
+static const void *net_namespace(const struct device *d)
 {
-	struct net_device *dev = to_net_dev(d);
+	const struct net_device *dev = to_net_dev(d);
 
 	return dev_net(dev);
 }
 
-static void net_get_ownership(struct device *d, kuid_t *uid, kgid_t *gid)
+static void net_get_ownership(const struct device *d, kuid_t *uid, kgid_t *gid)
 {
-	struct net_device *dev = to_net_dev(d);
+	const struct net_device *dev = to_net_dev(d);
 	const struct net *net = dev_net(dev);
 
 	net_ns_get_ownership(net, uid, gid);
diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index dac4fdc7488a..b390ff245d5e 100644
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -832,7 +832,7 @@ static void rfkill_release(struct device *dev)
 	kfree(rfkill);
 }
 
-static int rfkill_dev_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int rfkill_dev_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
 	struct rfkill *rfkill = to_rfkill(dev);
 	unsigned long flags;
diff --git a/net/sunrpc/sysfs.c b/net/sunrpc/sysfs.c
index c1f559892ae8..1e05a2d723f4 100644
--- a/net/sunrpc/sysfs.c
+++ b/net/sunrpc/sysfs.c
@@ -31,7 +31,7 @@ static void rpc_sysfs_object_release(struct kobject *kobj)
 }
 
 static const struct kobj_ns_type_operations *
-rpc_sysfs_object_child_ns_type(struct kobject *kobj)
+rpc_sysfs_object_child_ns_type(const struct kobject *kobj)
 {
 	return &net_ns_type_operations;
 }
@@ -381,17 +381,17 @@ static void rpc_sysfs_xprt_release(struct kobject *kobj)
 	kfree(xprt);
 }
 
-static const void *rpc_sysfs_client_namespace(struct kobject *kobj)
+static const void *rpc_sysfs_client_namespace(const struct kobject *kobj)
 {
 	return container_of(kobj, struct rpc_sysfs_client, kobject)->net;
 }
 
-static const void *rpc_sysfs_xprt_switch_namespace(struct kobject *kobj)
+static const void *rpc_sysfs_xprt_switch_namespace(const struct kobject *kobj)
 {
 	return container_of(kobj, struct rpc_sysfs_xprt_switch, kobject)->net;
 }
 
-static const void *rpc_sysfs_xprt_namespace(struct kobject *kobj)
+static const void *rpc_sysfs_xprt_namespace(const struct kobject *kobj)
 {
 	return container_of(kobj, struct rpc_sysfs_xprt,
 			    kobject)->xprt->xprt_net;
diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c
index 0c3f05c9be27..cdb638647e0b 100644
--- a/net/wireless/sysfs.c
+++ b/net/wireless/sysfs.c
@@ -148,7 +148,7 @@ static SIMPLE_DEV_PM_OPS(wiphy_pm_ops, wiphy_suspend, wiphy_resume);
 #define WIPHY_PM_OPS NULL
 #endif
 
-static const void *wiphy_namespace(struct device *d)
+static const void *wiphy_namespace(const struct device *d)
 {
 	struct wiphy *wiphy = container_of(d, struct wiphy, dev);