linux-kernel - Re: [RFC 03/32] ACPI: Kconfig: add HAS

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Message-ID: <CAJZ5v0iBJ8NtQautnWnp_pXMfLy_rxys8j4+ugSTbNBb=wzy6A@mail.gmail.com>
Date:   Mon, 27 Dec 2021 17:47:42 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        John Garry <john.garry@...wei.com>,
        Nick Hu <nickhu@...estech.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>, Guo Ren <guoren@...nel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        linux-riscv@...ts.infradead.org, linux-csky@...r.kernel.org,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: Re: [RFC 03/32] ACPI: Kconfig: add HAS_IOPORT dependencies

On Mon, Dec 27, 2021 at 5:44 PM Niklas Schnelle <schnelle@...ux.ibm.com> wrote:
>
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. As ACPI always uses I/O port access

The ARM64 people may not agree with this.

> we depend on HAS_IOPORT unconditionally.
>
> Co-developed-by: Arnd Bergmann <arnd@...nel.org>
> Signed-off-by: Arnd Bergmann <arnd@...nel.org>
> Signed-off-by: Niklas Schnelle <schnelle@...ux.ibm.com>
> ---
>  drivers/acpi/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index cdbdf68bd98f..b57f15817ede 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -9,6 +9,7 @@ config ARCH_SUPPORTS_ACPI
>  menuconfig ACPI
>         bool "ACPI (Advanced Configuration and Power Interface) Support"
>         depends on ARCH_SUPPORTS_ACPI
> +       depends on HAS_IOPORT
>         select PNP
>         select NLS
>         default y if X86
> --
> 2.32.0
>