linux-kernel - Re: [PATCH] efi/libstub/arm64: Enable __efistub

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Date:   Fri, 10 Apr 2020 10:09:25 +0200
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Victor Erminpour <victor.erminpour@...cle.com>
Cc:     linux-efi <linux-efi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] efi/libstub/arm64: Enable __efistub_global define in
 .data section

On Thu, 9 Apr 2020 at 23:44, Victor Erminpour
<victor.erminpour@...cle.com> wrote:
>
> Enable the __efistub_global define to place variables in the
> .data section for both CONFIG_ARM and CONFIG_ARM64.
>
> This places the EFIstub sys_table variable and other EFIstub
> static variables in the .data section for both CONFIG_ARM and
> CONFIG_ARM64.
>

What does that achieve?

> Signed-off-by: Victor Erminpour <victor.erminpour@...cle.com>
> ---
>  drivers/firmware/efi/libstub/efistub.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
> index c244b16..59932d6 100644
> --- a/drivers/firmware/efi/libstub/efistub.h
> +++ b/drivers/firmware/efi/libstub/efistub.h
> @@ -25,7 +25,7 @@
>  #define EFI_ALLOC_ALIGN                EFI_PAGE_SIZE
>  #endif
>
> -#ifdef CONFIG_ARM
> +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
>  #define __efistub_global       __section(.data)
>  #else
>  #define __efistub_global