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References: <202104071815.lq85YO6c-lkp@intel.com>
In-Reply-To: <202104071815.lq85YO6c-lkp@intel.com>
From:   Nick Desaulniers <ndesaulniers@google.com>
Date:   Wed, 7 Apr 2021 11:07:26 -0700
Message-ID: <CAKwvOdnrSorkpCCshZAav=1rczSTWa5Ji_Nhcd=vzmywAiCoNQ@mail.gmail.com>
Subject: Re: arm-linux-gnueabi-ld: warning: orphan section `__cpuidle_method_of_table'
 from `arch/arm/mach-omap2/pm33xx-core.o' being placed in section `__cpuidle_method_of_table'
To:     Kees Cook <keescook@chromium.org>,
        Masahiro Yamada <masahiroy@kernel.org>
Cc:     kbuild-all@lists.01.org, LKML <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        kernel test robot <lkp@intel.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>
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On Wed, Apr 7, 2021 at 3:52 AM kernel test robot <lkp@intel.com> wrote:
>
> Hi Kees,
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   2d743660786ec51f5c1fefd5782bbdee7b227db0
> commit: 5a17850e251a55bba6d65aefbfeacfa9888cd2cd arm/build: Warn on orphan section placement
> date:   7 months ago
> config: arm-randconfig-r033-20210407 (attached as .config)
> compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5a17850e251a55bba6d65aefbfeacfa9888cd2cd
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 5a17850e251a55bba6d65aefbfeacfa9888cd2cd
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> arm-linux-gnueabi-ld: warning: orphan section `__cpuidle_method_of_table' from `arch/arm/mach-omap2/pm33xx-core.o' being placed in section `__cpuidle_method_of_table'
> >> arm-linux-gnueabi-ld: warning: orphan section `__cpuidle_method_of_table' from `arch/arm/mach-omap2/pm33xx-core.o' being placed in section `__cpuidle_method_of_table'
> >> arm-linux-gnueabi-ld: warning: orphan section `__cpuidle_method_of_table' from `arch/arm/mach-omap2/pm33xx-core.o' being placed in section `__cpuidle_method_of_table'

Looks like arch/arm/include/asm/cpuidle.h defines
`CPUIDLE_METHOD_OF_DECLARE` to create a static struct in such a
section.  Only arch/arm/mach-omap2/pm33xx-core.c uses that macro.

>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org


-- 
Thanks,
~Nick Desaulniers