linux-kernel - [rcu:dev.2020.04.01a 120/122] ftrace.c:undefined reference to `synchronize_rcu_tasks

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Date:   Sat, 4 Apr 2020 13:50:06 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [rcu:dev.2020.04.01a 120/122] ftrace.c:undefined reference to
 `synchronize_rcu_tasks_rude'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.04.01a
head:   ffebabde5e80e76612fd06a934cd2a147128054c
commit: ca232c9d7331168ed8495f07253cb18cb9af2053 [120/122] ftrace: Use synchronize_rcu_tasks_rude() instead of ftrace_sync()
config: arm-pxa_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout ca232c9d7331168ed8495f07253cb18cb9af2053
        # save the attached .config to linux build tree
        GCC_VERSION=9.3.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: kernel/trace/ftrace.o: in function `ftrace_shutdown':
>> ftrace.c:(.text+0x3ccc): undefined reference to `synchronize_rcu_tasks_rude'
   arm-linux-gnueabi-ld: kernel/trace/ftrace.o: in function `ftrace_graph_release':
   ftrace.c:(.text+0x56d4): undefined reference to `synchronize_rcu_tasks_rude'

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

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