linux-kernel - Re: [PATCH] Ask user input only when CONFIG_X86 or CONFIG_COMPILE

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Date:   Wed, 9 Oct 2019 16:11:04 +0200
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Narendra K <Narendra.K@...l.com>
Cc:     linux-efi <linux-efi@...r.kernel.org>,
        Mario Limonciello <Mario.Limonciello@...l.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        James Morse <james.morse@....com>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] Ask user input only when CONFIG_X86 or
 CONFIG_COMPILE_TEST is set to y

Hello Narendra,

On Wed, 2 Oct 2019 at 21:44, <Narendra.K@...l.com> wrote:
>
> From: Narendra K <Narendra.K@...l.com>
>
> For the EFI_RCI2_TABLE kconfig option, 'make oldconfig' asks the user
> for input as it is a new kconfig option in kernel version 5.4. This patch
> modifies the kconfig option to ask the user for input only when CONFIG_X86
> or CONFIG_COMPILE_TEST is set to y.
>
> The patch also makes EFI_RCI2_TABLE kconfig option depend on CONFIG_EFI.
>
> Signed-off-by: Narendra K <Narendra.K@...l.com>
> ---
> The patch is created on kernel version 5.4-rc1.
>
> Hi Ard, I have made following changes -
>
> - changed the prompt string from "EFI Runtime Configuration
> Interface Table Version 2 Support" to "EFI RCI Table Version 2 Support"
> as the string crossed 80 char limit.
>
> - added "depends on EFI" so that code builds only when CONFIG_EFI is
> set to y.
>
> - added 'default n' for ease of understanding though default is set to n.
>

None of these changes are necessary, tbh. 'depends on EFI' is implied
by the placement of the option, and default n is indeed the default.


>  drivers/firmware/efi/Kconfig | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
> index 178ee8106828..6e4c46e8a954 100644
> --- a/drivers/firmware/efi/Kconfig
> +++ b/drivers/firmware/efi/Kconfig
> @@ -181,7 +181,10 @@ config RESET_ATTACK_MITIGATION
>           reboots.
>
>  config EFI_RCI2_TABLE
> -       bool "EFI Runtime Configuration Interface Table Version 2 Support"
> +       bool
> +       prompt "EFI RCI Table Version 2 Support" if X86 || COMPILE_TEST

You can drop the || COMPILE_TEST as well.
> +       depends on EFI
> +       default n
>         help
>           Displays the content of the Runtime Configuration Interface
>           Table version 2 on Dell EMC PowerEdge systems as a binary
> --
> 2.18.1
>
> --
> With regards,
> Narendra K