kernel/linux.git/include/linux/device, branch v6.3.8

driver core: bus: add bus_get_dev_root() function

2023-02-10T09:16:42+00:00

Instead of poking around in the struct bus_type directly for the dev_root pointer, provide a function to return it properly reference counted, if it is present in the bus. This will be needed to move the pointer out of struct bus_type in the future. Use the function in the driver core code at the same time it is introduced to verify that it works properly. Cc: "Rafael J. Wysocki" Link: https://lore.kernel.org/r/20230209093556.19132-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus: constify bus_unregister()

2023-02-09T09:43:45+00:00

The bus_unregister() function can now take a const * to bus_type, not just a * so fix that up. Cc: "Rafael J. Wysocki" Link: https://lore.kernel.org/r/20230208111330.439504-22-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus: constify bus_get_kset()

2023-02-09T09:43:41+00:00

The bus_get_kset() function should be taking a const * to bus_type, not just a * so fix that up. Cc: "Rafael J. Wysocki" Link: https://lore.kernel.org/r/20230208111330.439504-20-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus: constify bus_register/unregister_notifier()

2023-02-09T09:43:39+00:00

The bus_register_notifier() and bus_unregister_notifier() functions should be taking a const * to bus_type, not just a * so fix that up. Cc: "Rafael J. Wysocki" Link: https://lore.kernel.org/r/20230208111330.439504-19-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: remove private pointer from struct bus_type

2023-02-09T09:43:37+00:00

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" Link: https://lore.kernel.org/r/20230208111330.439504-18-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus: convert bus_create/remove_file to be constant

2023-02-09T09:43:12+00:00

bus_create_file() and bus_remove_file() can be made to take a constant bus pointer, as it should not be modifying anything in the bus structure. Make this change and move the functions to use the internal subsys_get/put() logic as well, to prevent the use of the back-pointer in struct bus_type. Cc: "Rafael J. Wysocki" Link: https://lore.kernel.org/r/20230208111330.439504-5-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus: constantify the bus_find_* functions

2023-02-09T09:43:09+00:00

All of the bus find and iterator functions do not modify the struct bus_type passed to them, so mark them as constant to enforce this rule. Cc: "Rafael J. Wysocki" Link: https://lore.kernel.org/r/20230208111330.439504-4-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus: move lock_class_key into dynamic structure

2023-02-01T19:03:18+00:00

Move the lock_class_key structure out of struct bus_type and into the dynamic structure we create already for all bus_types registered with the kernel. This saves on static space and removes one more writable field in struct bus_type. In the future, the same field can be moved out of the struct class logic because it shares this same private structure. Most everyone will never notice this change, as lockdep is not enabled in real systems so no memory or logic changes are happening for them. Cc: "Rafael J. Wysocki" Acked-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20230201083349.4038660-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: make struct bus_type.uevent() take a const *

2023-01-27T12:45:52+00:00

The uevent() callback in struct bus_type should not be modifying the device that is passed into it, so mark it as a const * and propagate the function signature changes out into all relevant subsystems that use this callback. Acked-by: Rafael J. Wysocki Acked-by: Hans de Goede Link: https://lore.kernel.org/r/20230111113018.459199-16-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman

driver core: bus.h: document bus notifiers better

2023-01-18T08:00:42+00:00

The bus notifier values are not documented all that well, so clean this up and make a real enumerated type for them and document them much better. When doing this, remove the hex values and just rely on the enumerated type instead as that is all that is needed. Reviewed-by: Randy Dunlap Reviewed-by: Rafael J. Wysocki Link: https://lore.kernel.org/r/20230111092331.3946745-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman