linux-kernel - kernel/rcu/tasks.h:1031:6: warning: no previous prototype for 'show_rcu_tasks_gp

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Date:   Tue, 20 Apr 2021 14:56:30 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: kernel/rcu/tasks.h:1031:6: warning: no previous prototype for
 'show_rcu_tasks_gp_kthreads'

Hi Paul,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   7af08140979a6e7e12b78c93b8625c8d25b084e2
commit: e21408ceec2de5be418efa39feb1e2c00f824a72 rcu-tasks: Add RCU tasks to rcutorture writer stall output
date:   12 months ago
config: h8300-allnoconfig (attached as .config)
compiler: h8300-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/torvalds/linux.git/commit/?id=e21408ceec2de5be418efa39feb1e2c00f824a72
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e21408ceec2de5be418efa39feb1e2c00f824a72
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=h8300 

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

All warnings (new ones prefixed by >>):

   In file included from kernel/rcu/update.c:587:
>> kernel/rcu/tasks.h:1031:6: warning: no previous prototype for 'show_rcu_tasks_gp_kthreads' [-Wmissing-prototypes]
    1031 | void show_rcu_tasks_gp_kthreads(void) {}
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/show_rcu_tasks_gp_kthreads +1031 kernel/rcu/tasks.h

  1028	
  1029	#else /* #ifdef CONFIG_TASKS_RCU_GENERIC */
  1030	static inline void rcu_tasks_bootup_oddness(void) {}
> 1031	void show_rcu_tasks_gp_kthreads(void) {}

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

Download attachment ".config.gz" of type "application/gzip" (4771 bytes)