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driver core: remove private pointer from struct bus_type

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Now that the driver code has been refactored to not rely on the pointer
from a struct bus_type to the private structure it can be safely removed
from the structure entirely.

This will allow most bus_type structures to now be marked as const.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230208111330.439504-18-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-02-08 12:13:26 +01:00
parent 63b823d7d3
commit d2bf38c088
2 changed files with 0 additions and 8 deletions
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4
drivers/base/bus.c
View file

@ -205,11 +205,9 @@ EXPORT_SYMBOL_GPL(bus_remove_file);
static void bus_release(struct kobject *kobj)
{
struct subsys_private *priv = to_subsys_private(kobj);
struct bus_type *bus = priv->bus;
lockdep_unregister_key(&priv->lock_key);
kfree(priv);
bus->p = NULL;
}
static const struct kobj_type bus_ktype = {
@ -854,7 +852,6 @@ int bus_register(struct bus_type *bus)
return -ENOMEM;
priv->bus = bus;
bus->p = priv;
BLOCKING_INIT_NOTIFIER_HEAD(&priv->bus_notifier);
@ -917,7 +914,6 @@ int bus_register(struct bus_type *bus)
kset_unregister(&priv->subsys);
out:
kfree(priv);
bus->p = NULL;
return retval;
}
EXPORT_SYMBOL_GPL(bus_register);

4
include/linux/device/bus.h
View file

@ -66,8 +66,6 @@ struct fwnode_handle;
* @iommu_ops: IOMMU specific operations for this bus, used to attach IOMMU
* driver implementations to a bus and allow the driver to do
* bus-specific setup
* @p: The private data of the driver core, only the driver core can
* touch this.
* @lock_key: Lock class key for use by the lock validator
* @need_parent_lock: When probing or removing a device on this bus, the
* device core should lock the device's parent.
@ -111,8 +109,6 @@ struct bus_type {
const struct iommu_ops *iommu_ops;
struct subsys_private *p;
bool need_parent_lock;
};