Re: [PATCH v1 5/5][RFT] ACPI: Drop parent field from struct acpi_device

[Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>]

On Wed, Aug 10, 2022 at 06:23:05PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> 
> The parent field in struct acpi_device is, in fact, redundant,
> because the dev.parent field in it effectively points to the same
> object and it is used by the driver core.
> 
> Accordingly, the parent field can be dropped from struct acpi_device
> and for this purpose define acpi_dev_parent() to retrieve the parent
> struct acpi_device pointer from the dev.parent field in struct
> acpi_device.  Next, update all of the users of the parent field
> in struct acpi_device to use acpi_dev_parent() instead of it and
> drop it.
> 
> While at it, drop the ACPI_IS_ROOT_DEVICE() macro that is only used
> in one place in a confusing way.
> 
> No intentional functional impact.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> ---
> 
> I may have missed some places where adev->parent is used directly, so
> if that's happened, please let me know (I'm assuming that 0-day will
> pick up this patch and run it through all of the relevant configs
> anyway).
> 
> ---
>  drivers/acpi/acpi_platform.c |    6 +++---
>  drivers/acpi/acpi_video.c    |    2 +-
>  drivers/acpi/device_pm.c     |   19 ++++++++++---------
>  drivers/acpi/property.c      |    6 ++++--
>  drivers/acpi/sbs.c           |    2 +-
>  drivers/acpi/sbshc.c         |    2 +-
>  drivers/acpi/scan.c          |   17 ++++++-----------
>  drivers/hv/vmbus_drv.c       |    3 ++-
>  drivers/spi/spi.c            |    2 +-
>  drivers/thunderbolt/acpi.c   |    2 +-

Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>