[linux-next:master 7890/9793] kernel/rcu/rcuscale.c:301:20: error: use of undeclared identifier 'get_rcu_tasks_gp_kthread'; did you mean 'get_rcu_tasks_trace_gp_kthread'?

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   b16049b21162bb649cdd8519642a35972b7910fe
commit: df8fa2f1fc4c20cd300855a11b31ba5565f45ac6 [7890/9793] rcuscale: Measure RCU Tasks Trace grace-period kthread CPU time
config: arm-randconfig-r046-20230614 (https://download.01.org/0day-ci/archive/20230614/202306141920.TTvpsXwJ-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=df8fa2f1fc4c20cd300855a11b31ba5565f45ac6
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout df8fa2f1fc4c20cd300855a11b31ba5565f45ac6
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash kernel/

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306141920.TTvpsXwJ-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

>> kernel/rcu/rcuscale.c:301:20: error: use of undeclared identifier 'get_rcu_tasks_gp_kthread'; did you mean 'get_rcu_tasks_trace_gp_kthread'?
     301 |         .rso_gp_kthread = get_rcu_tasks_gp_kthread,
         |                           ^~~~~~~~~~~~~~~~~~~~~~~~
         |                           get_rcu_tasks_trace_gp_kthread
   include/linux/rcupdate_trace.h:90:21: note: 'get_rcu_tasks_trace_gp_kthread' declared here
      90 | struct task_struct *get_rcu_tasks_trace_gp_kthread(void);
         |                     ^
   1 error generated.
--
   In file included from kernel/rcu/update.c:649:
>> kernel/rcu/tasks.h:1113:21: warning: no previous prototype for function 'get_rcu_tasks_gp_kthread' [-Wmissing-prototypes]
    1113 | struct task_struct *get_rcu_tasks_gp_kthread(void)
         |                     ^
   kernel/rcu/tasks.h:1113:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1113 | struct task_struct *get_rcu_tasks_gp_kthread(void)
         | ^
         | static 
   1 warning generated.


vim +301 kernel/rcu/rcuscale.c

   289	
   290	static struct rcu_scale_ops tasks_ops = {
   291		.ptype		= RCU_TASKS_FLAVOR,
   292		.init		= rcu_sync_scale_init,
   293		.readlock	= tasks_scale_read_lock,
   294		.readunlock	= tasks_scale_read_unlock,
   295		.get_gp_seq	= rcu_no_completed,
   296		.gp_diff	= rcu_seq_diff,
   297		.async		= call_rcu_tasks,
   298		.gp_barrier	= rcu_barrier_tasks,
   299		.sync		= synchronize_rcu_tasks,
   300		.exp_sync	= synchronize_rcu_tasks,
 > 301		.rso_gp_kthread	= get_rcu_tasks_gp_kthread,
   302		.name		= "tasks"
   303	};
   304	

-- 
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https://github.com/intel/lkp-tests/wiki