linux-kernel - [rcu:dev.2020.03.03b 43/45] kernel/rcu/update.c:583:2: error: implicit declaration of function 'rcu_tasks_bootup

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Message-ID: <202003040915.QC7nV6ZR%lkp@intel.com>
Date:   Wed, 4 Mar 2020 09:33:05 +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.2020.03.03b 43/45] kernel/rcu/update.c:583:2: error:
 implicit declaration of function 'rcu_tasks_bootup_oddness'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.03.03b
head:   647c0bb2da5c14b25d27661fa93de7fca9042daf
commit: d060bd985c4d160df31659a80cf5fabe1cd508b4 [43/45] rcu-tasks: Refactor RCU-tasks to allow variants to be added
config: openrisc-simple_smp_defconfig (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout d060bd985c4d160df31659a80cf5fabe1cd508b4
        # save the attached .config to linux build tree
        GCC_VERSION=9.2.0 make.cross ARCH=openrisc 

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

All errors (new ones prefixed by >>):

   kernel/rcu/update.c: In function 'rcupdate_announce_bootup_oddness':
>> kernel/rcu/update.c:583:2: error: implicit declaration of function 'rcu_tasks_bootup_oddness' [-Werror=implicit-function-declaration]
     583 |  rcu_tasks_bootup_oddness();
         |  ^~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/rcu_tasks_bootup_oddness +583 kernel/rcu/update.c

59d80fd8351b7b Paul E. McKenney 2017-04-28  567  
59d80fd8351b7b Paul E. McKenney 2017-04-28  568  /*
59d80fd8351b7b Paul E. McKenney 2017-04-28  569   * Print any significant non-default boot-time settings.
59d80fd8351b7b Paul E. McKenney 2017-04-28  570   */
59d80fd8351b7b Paul E. McKenney 2017-04-28  571  void __init rcupdate_announce_bootup_oddness(void)
59d80fd8351b7b Paul E. McKenney 2017-04-28  572  {
59d80fd8351b7b Paul E. McKenney 2017-04-28  573  	if (rcu_normal)
59d80fd8351b7b Paul E. McKenney 2017-04-28  574  		pr_info("\tNo expedited grace period (rcu_normal).\n");
59d80fd8351b7b Paul E. McKenney 2017-04-28  575  	else if (rcu_normal_after_boot)
59d80fd8351b7b Paul E. McKenney 2017-04-28  576  		pr_info("\tNo expedited grace period (rcu_normal_after_boot).\n");
59d80fd8351b7b Paul E. McKenney 2017-04-28  577  	else if (rcu_expedited)
59d80fd8351b7b Paul E. McKenney 2017-04-28  578  		pr_info("\tAll grace periods are expedited (rcu_expedited).\n");
59d80fd8351b7b Paul E. McKenney 2017-04-28  579  	if (rcu_cpu_stall_suppress)
59d80fd8351b7b Paul E. McKenney 2017-04-28  580  		pr_info("\tRCU CPU stall warnings suppressed (rcu_cpu_stall_suppress).\n");
59d80fd8351b7b Paul E. McKenney 2017-04-28  581  	if (rcu_cpu_stall_timeout != CONFIG_RCU_CPU_STALL_TIMEOUT)
59d80fd8351b7b Paul E. McKenney 2017-04-28  582  		pr_info("\tRCU CPU stall warnings timeout set to %d (rcu_cpu_stall_timeout).\n", rcu_cpu_stall_timeout);
59d80fd8351b7b Paul E. McKenney 2017-04-28 @583  	rcu_tasks_bootup_oddness();
59d80fd8351b7b Paul E. McKenney 2017-04-28  584  }
59d80fd8351b7b Paul E. McKenney 2017-04-28  585  

:::::: The code at line 583 was first introduced by commit
:::::: 59d80fd8351b7b9a5dc7bbfa8bc4ca19f6ff3dad rcu: Print out rcupdate.c non-default boot-time settings

:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

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