[rcu:rcu/next 10/11] kernel/rcu/tasks.h:594:20: error: static declaration of 'exit_tasks_rcu_start' follows non-static declaration

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   2ec296bd21c79b080bd6b3fb143122f18440d930
commit: 8c8942d72e9bf1e19b6af0a8df4c7f44d2d384c0 [10/11] rcu-tasks: Prevent complaints of unused show_rcu_tasks_classic_gp_kthread()
config: x86_64-randconfig-a014-20200827 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 71f3169e1baeff262583b35ef88f8fb6df7be85e)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 8c8942d72e9bf1e19b6af0a8df4c7f44d2d384c0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from kernel/rcu/update.c:578:
>> kernel/rcu/tasks.h:594:20: error: static declaration of 'exit_tasks_rcu_start' follows non-static declaration
   static inline void exit_tasks_rcu_start(void) { }
                      ^
   include/linux/rcupdate.h:181:6: note: previous declaration is here
   void exit_tasks_rcu_start(void);
        ^
   In file included from kernel/rcu/update.c:578:
>> kernel/rcu/tasks.h:595:20: error: static declaration of 'exit_tasks_rcu_finish' follows non-static declaration
   static inline void exit_tasks_rcu_finish(void) { exit_tasks_rcu_finish_trace(current); }
                      ^
   include/linux/rcupdate.h:182:6: note: previous declaration is here
   void exit_tasks_rcu_finish(void);
        ^
   2 errors generated.

# https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=8c8942d72e9bf1e19b6af0a8df4c7f44d2d384c0
git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
git fetch --no-tags rcu rcu/next
git checkout 8c8942d72e9bf1e19b6af0a8df4c7f44d2d384c0
vim +/exit_tasks_rcu_start +594 kernel/rcu/tasks.h

   591	
   592	#else /* #ifdef CONFIG_TASKS_RCU */
   593	static inline void show_rcu_tasks_classic_gp_kthread(void) { }
 > 594	static inline void exit_tasks_rcu_start(void) { }
 > 595	static inline void exit_tasks_rcu_finish(void) { exit_tasks_rcu_finish_trace(current); }
   596	#endif /* #else #ifdef CONFIG_TASKS_RCU */
   597	

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

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