linux-kernel - Re: [PATCH 2/5] ACPI: scan: Make acpi_walk_dep_device

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Date:   Wed, 16 Jun 2021 17:11:01 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/5] ACPI: scan: Make acpi_walk_dep_device_list()

On Wed, Jun 16, 2021 at 4:41 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> Hi,
>
> On 6/16/21 4:22 PM, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> >
> > Because acpi_walk_dep_device_list() is only called by the code in the
> > file in which it is defined, make it static, drop the export of it
> > and drop its header from acpi.h.
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Actually, acpi_walk_dep_device_list() was split out as a
> helper function used to implement acpi_dev_clear_dependencies()
> because it will be used outside of drivers/acpi.

Not exactly.

> Specifically it will be used in the new intel_skl_int3472 driver:
> https://patchwork.kernel.org/project/platform-driver-x86/patch/20210603224007.120560-6-djrscally@gmail.com/

That driver will use acpi_dev_get_first_consumer_dev() which is based
on acpi_walk_dep_device_list(), but still defined in
drivers/acpi/scan.c.

> Which I plan to merge into pdx86/for-next today, I've just merged
> your linux-pm/acpi-scan PULL-req which exports acpi_walk_dep_device_list()
> as preparation for this.

No, the acpi_walk_dep_device_list() is a leftover there AFAICS.

If it needs to be exported in the future, that still can be done.  ATM
the export isn't necessary.

Thanks!