linux-kernel - Re: [PATCH] treewide: Convert macro and uses of __section(foo) to _

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Date:   Thu, 22 Oct 2020 13:42:21 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH] treewide: Convert macro and uses of __section(foo) to __section("foo")

.On Wed, Oct 21, 2020 at 7:36 PM Joe Perches <joe@...ches.com> wrote:
>
> Use a more generic form for __section that requires quotes to avoid
> complications with clang and gcc differences.
>
> Remove the quote operator # from compiler_attributes.h __section macro.
>
> Convert all unquoted __section(foo) uses to quoted __section("foo").
> Also convert __attribute__((section("foo"))) uses to __section("foo")
> even if the __attribute__ has multiple list entry forms.
>
> Conversion done using a script:
>
> Link: https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
>
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
>
> This conversion was previously submitted to -next last month
> https://lore.kernel.org/lkml/46f69161e60b802488ba8c8f3f8bbf922aa3b49b.camel@perches.com/
>
> Nick Desaulniers found a defect in the conversion of 2 boot files
> for powerpc, but no other defect was found for any other arch.

Untested, but:
Reviewed-by: Nick Desaulniers <ndesaulniers@...ogle.com>

Good job handling the trickier cases when the attribute was mixed with
others, and printing it in scripts/mod/modpost.c.

The only cases that *might* be similar to PPC are:
>  arch/s390/boot/startup.c              |  2 +-
>  arch/x86/boot/compressed/pgtable_64.c |  2 +-
>  arch/x86/purgatory/purgatory.c        |  4 ++--

So a quick test of x86_64 and s390 would be good.

Thanks for the patch.

>
> The script was corrected to avoid converting these 2 files.
>
> There is no difference between the script output when run on today's -next
> and Linus' tree through commit f804b3159482, so this should be reasonable to
> apply now.


-- 
Thanks,
~Nick Desaulniers