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

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Message-ID: <CAK7LNAQYQiuQ2mn=aAqOrx-xsV1hT5Q6UTkWLNkG_4E77NyEog@mail.gmail.com>
Date: Thu, 4 Jan 2024 23:16:36 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: sedat.dilek@...il.com
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

On Thu, Jan 4, 2024 at 1:05 AM Sedat Dilek <sedat.dilek@...il.com> wrote:
>
> 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?


No.

This patch is a separate clean-up, not a bug fix.

No need for back-porting.




>
> ...and CC Helge Deller?


You did it.


Thanks.





> 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
> >
> >
>


-- 
Best Regards
Masahiro Yamada