linux-kernel - Re: [PATCH 2/2] i2c: mux: annotate the nested rt

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Message-ID: <201805261654.iUNeyuTf%fengguang.wu@intel.com>
Date:   Sat, 26 May 2018 18:11:05 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Peter Rosin <peda@...ntia.se>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Peter Rosin <peda@...ntia.se>,
        Wolfram Sang <wsa@...-dreams.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Davidlohr Bueso <dave@...olabs.net>, linux-i2c@...r.kernel.org,
        Peter Chang <dpf@...gle.com>,
        Deepa Dinamani <deepadinamani@...gle.com>,
        John Sperbeck <jsperbeck@...gle.com>
Subject: Re: [PATCH 2/2] i2c: mux: annotate the nested rt_mutex usage

Hi Peter,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.17-rc6]
[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/Peter-Rosin/rtmutex-allow-specifying-a-subclass-for-nested-locking/20180526-140421
config: i386-randconfig-s0-201820 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   WARNING: vmlinux: 'mutex_lock_nested' exported twice. Previous export was in vmlinux
>> ERROR: "rt_mutex_lock_nested" [drivers/i2c/i2c-mux.ko] undefined!
>> ERROR: "rt_mutex_lock_nested" [drivers/i2c/i2c-core.ko] undefined!

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