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Date: Mon, 13 Feb 2017 17:47:34 +0100
From: Oleg Nesterov <oleg@redhat.com>
To: kbuild test robot <lkp@intel.com>
Cc: kbuild-all@01.org, Andrew Morton <akpm@linux-foundation.org>,
        Aleksa Sarai <asarai@suse.com>, Andy Lutomirski <luto@amacapital.net>,
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        Michal Hocko <mhocko@kernel.org>,
        Ulrich Obergfell <uobergfe@redhat.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] exec: don't wait for zombie threads with
 cred_guard_mutex held
Message-ID: <20170213164734.GA5653@redhat.com>
References: <20170213141516.GA30233@redhat.com>
 <201702140051.SLx1Dusy%fengguang.wu@intel.com>
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On 02/14, kbuild test robot wrote:
>
> Hi Oleg,
>
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.10-rc8 next-20170213]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Oleg-Nesterov/fix-the-traced-mt-exec-deadlock/20170213-221943
> config: m68k-sun3_defconfig (attached as .config)
> compiler: m68k-linux-gcc (GCC) 4.9.0
> reproduce:
>         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=m68k 
>
> All errors (new ones prefixed by >>):
> 
> >> ERROR: "de_thread" [fs/binfmt_aout.ko] undefined!

Aaah thanks...

Of course, I forgot to add EXPORT_SYMBOL(de_thread), will send V2.

Thanks a lot!

Oleg.