linux-kernel - Re: [PATCHv7 25/33] x86/vdso: Zap vvar pages on switch a time namspace

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Message-ID: <201910141118.ZVXedTq6%lkp@intel.com>
Date:   Mon, 14 Oct 2019 11:11:52 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Dmitry Safonov <dima@...sta.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Dmitry Safonov <dima@...sta.com>,
        Adrian Reber <adrian@...as.de>,
        Andrei Vagin <avagin@...nvz.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        Jann Horn <jannh@...gle.com>, Jeff Dike <jdike@...toit.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        containers@...ts.linux-foundation.org, criu@...nvz.org,
        linux-api@...r.kernel.org, x86@...nel.org,
        Andrei Vagin <avagin@...il.com>
Subject: Re: [PATCHv7 25/33] x86/vdso: Zap vvar pages on switch a time
 namspace

Hi Dmitry,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[cannot apply to v5.4-rc2 next-20191011]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Dmitry-Safonov/kernel-Introduce-Time-Namespace/20191014-075119
config: riscv-defconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   kernel/time/namespace.o: In function `.L0 ':
   namespace.c:(.text+0xfc): undefined reference to `arch_get_vdso_data'
   kernel/time/namespace.o: In function `timens_install':
>> namespace.c:(.text+0x41c): undefined reference to `vdso_join_timens'
   namespace.c:(.text+0x4ce): undefined reference to `vdso_join_timens'

---
0-DAY kernel test infrastructure                Open Source Technology Center
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