Re: [PATCH v2 5/5] ACPI: Drop parent field from struct acpi_device

[Andy Shevchenko]

On Wed, Aug 24, 2022 at 8:13 PM Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> 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 a 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.

Side note: Should we not convert these to use acpi_dev_parent()?

https://elixir.bootlin.com/linux/v6.0-rc2/source/drivers/acpi/property.c#L1271
https://elixir.bootlin.com/linux/v6.0-rc2/source/drivers/bus/hisi_lpc.c#L397

-- 
With Best Regards,
Andy Shevchenko