linux-kernel - Re: [PATCH] linux/export.h: remove unneeded .balign directive

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Message-ID: <CA+icZUX77miqFC5=iH_9e4BZw5hc1Ci8A3cHL1uGPnzHw258Hw@mail.gmail.com>
Date: Wed, 3 Jan 2024 17:04:32 +0100
From: Sedat Dilek <sedat.dilek@...il.com>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Helge Deller <deller@....de>
Subject: Re: [PATCH] linux/export.h: remove unneeded .balign directive

Happy new 2024 Masahiro,

some small nits.

What about adding links to the commits...

linux/export: Fix alignment for 64-bit ksymtab entries
[ Upstream commit f6847807c22f6944c71c981b630b9fff30801e73 ]

linux/export: Ensure natural alignment of kcrctab array
[ Upstream commit 753547de0daecbdbd1af3618987ddade325d9aaa ]

^^ AFAICS in linux-stable - v6.6.10-rc1 includes both
^^ Is yours a follow-up and makes sense for linux-stable releases?

...and CC Helge Deller?

Best regards,
-Sedat-

Link: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/log/?h=linux-6.6.y

On Wed, Jan 3, 2024 at 2:55 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> The .export_symbol section is discarded by the linker script, hence
> no alignment is needed. Simplify the code.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
>
>  include/linux/export.h | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/include/linux/export.h b/include/linux/export.h
> index 0bbd02fd351d..dff230bb5aca 100644
> --- a/include/linux/export.h
> +++ b/include/linux/export.h
> @@ -15,13 +15,9 @@
>   */
>
>  #ifdef CONFIG_64BIT
> -#define __EXPORT_SYMBOL_REF(sym)                       \
> -       .balign 8                               ASM_NL  \
> -       .quad sym
> +#define __EXPORT_SYMBOL_PTR    .quad
>  #else
> -#define __EXPORT_SYMBOL_REF(sym)                       \
> -       .balign 4                               ASM_NL  \
> -       .long sym
> +#define __EXPORT_SYMBOL_PTR    .long
>  #endif
>
>  #define ___EXPORT_SYMBOL(sym, license, ns)             \
> @@ -29,7 +25,7 @@
>         __export_symbol_##sym:                  ASM_NL  \
>                 .asciz license                  ASM_NL  \
>                 .asciz ns                       ASM_NL  \
> -               __EXPORT_SYMBOL_REF(sym)        ASM_NL  \
> +               __EXPORT_SYMBOL_PTR sym         ASM_NL  \
>         .previous
>
>  #if defined(__DISABLE_EXPORTS)
> --
> 2.40.1
>
>