linux-kernel - Re: [rcu:rcu/test 138/143] rcutorture.c:(.text.rcu_torture_reader_do_mbchk+0x30): undefined reference to `torture_num_online

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Date:   Wed, 23 Dec 2020 07:15:19 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: [rcu:rcu/test 138/143]
 rcutorture.c:(.text.rcu_torture_reader_do_mbchk+0x30): undefined reference
 to `torture_num_online_cpus'

On Wed, Dec 23, 2020 at 10:14:02PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/test
> head:   4c4c8e04a7f8522de634aa062f4cd6b8b80c151b
> commit: cf516f4063cae6b69de6dd734d6c57901d24f112 [138/143] torture: Maintain torture-specific set of CPUs-online books
> config: mips-randconfig-r024-20201221 (attached as .config)
> compiler: mipsel-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=cf516f4063cae6b69de6dd734d6c57901d24f112
>         git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
>         git fetch --no-tags rcu rcu/test
>         git checkout cf516f4063cae6b69de6dd734d6c57901d24f112
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    mipsel-linux-ld: kernel/rcu/rcutorture.o: in function `rcu_torture_reader_do_mbchk':
> >> rcutorture.c:(.text.rcu_torture_reader_do_mbchk+0x30): undefined reference to `torture_num_online_cpus'
>    mipsel-linux-ld: kernel/rcu/rcutorture.o: in function `rcu_torture_reader':
> >> rcutorture.c:(.text.rcu_torture_reader+0x118): undefined reference to `torture_num_online_cpus'

Good catch, fix applied with attribution, thank you!

							Thanx, Paul