linux-kernel - drivers/infiniband/core/.tmp_gl_uverbs_main.o:undefined reference to `__user

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Message-ID: <201901112201.OeyuSAz3%fengguang.wu@intel.com>
Date:   Fri, 11 Jan 2019 22:52:43 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: drivers/infiniband/core/.tmp_gl_uverbs_main.o:undefined reference to
 `__user_bad'

Hi Masahiro,

It's probably a bug fix that unveils the link errors.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1bdbe227492075d058e37cb3d400e6468d0095b5
commit: 3bd6e94bec122a951d462c239b47954cf5f36e33 arch: restore generic-y += shmparam.h for some architectures
date:   5 days ago
config: microblaze-allyesconfig (attached as .config)
compiler: microblaze-linux-gcc (GCC) 8.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 3bd6e94bec122a951d462c239b47954cf5f36e33
        # save the attached .config to linux build tree
        GCC_VERSION=8.1.0 make.cross ARCH=microblaze 

All errors (new ones prefixed by >>):

   `.exit.data' referenced in section `.exit.text' of drivers/tty/n_hdlc.o: defined in discarded section `.exit.data' of drivers/tty/n_hdlc.o
   `.exit.data' referenced in section `.exit.text' of drivers/tty/n_hdlc.o: defined in discarded section `.exit.data' of drivers/tty/n_hdlc.o
   drivers/infiniband/core/uverbs_main.o: In function `ib_uverbs_write':
>> drivers/infiniband/core/.tmp_gl_uverbs_main.o:(.text+0x139c): undefined reference to `__user_bad'
   drivers/android/binder.o: In function `binder_thread_write':
>> drivers/android/.tmp_gl_binder.o:(.text+0xdbb8): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xdbe4): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xe05c): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xe5d8): undefined reference to `__user_bad'
   drivers/android/binder.o:drivers/android/.tmp_gl_binder.o:(.text+0xebb8): more undefined references to `__user_bad' follow

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