linux-kernel - Re: [PATCH 3/9] efi: Remove redundant creation of the "efivars" platform device

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Message-ID: <CAMj1kXEejZr2RCUJ59HfLwxQ1zFnWqj7vJ_ObrPTztE5s2UUcQ@mail.gmail.com>
Date: Mon, 17 Mar 2025 18:06:24 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: Sudeep Holla <sudeep.holla@....com>
Cc: linux-kernel@...r.kernel.org, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-efi@...r.kernel.org
Subject: Re: [PATCH 3/9] efi: Remove redundant creation of the "efivars"
 platform device

On Mon, 17 Mar 2025 at 11:13, Sudeep Holla <sudeep.holla@....com> wrote:
>
> The "efivars" platform device is created but never tracked or used,
> as there is no driver associated with it. Since this device serves
> no functional purpose, removing its creation without affecting any
> functionality.
>
> Cc: Ard Biesheuvel <ardb@...nel.org>
> Cc: linux-efi@...r.kernel.org
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> ---
>  drivers/firmware/efi/efi.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
> index 7309394b8fc98cf7a3424af209b752f0251c8c89..eec173cb1f398d3b4f28b42c917e50e1728dc277 100644
> --- a/drivers/firmware/efi/efi.c
> +++ b/drivers/firmware/efi/efi.c
> @@ -446,7 +446,6 @@ static int __init efisubsys_init(void)
>                 error = efivar_ssdt_load();
>                 if (error)
>                         pr_err("efi: failed to load SSDT, error %d.\n", error);
> -               platform_device_register_simple("efivars", 0, NULL, 0);
>         }
>
>         BLOCKING_INIT_NOTIFIER_HEAD(&efivar_ops_nh);
>

IIRC the efi-pstore module autoloads based on this platform device