linux-kernel - [peterz-queue:sched/core 29/29] kernel/sched/fair.c:230:2: error: implicit declaration of function 'sched_cfs_bandwidth_sysctl

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Date:   Wed, 9 Feb 2022 21:26:38 +0800
From:   kernel test robot <lkp@...el.com>
To:     Zhen Ni <nizhen@...ontech.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>
Subject: [peterz-queue:sched/core 29/29] kernel/sched/fair.c:230:2: error:
 implicit declaration of function 'sched_cfs_bandwidth_sysctl_init'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core
head:   bf8d9ef490e0600b3b30ac2244858ecd327123ab
commit: bf8d9ef490e0600b3b30ac2244858ecd327123ab [29/29] sched: Move cfs_bandwidth_slice sysctls to fair.c
config: hexagon-randconfig-r045-20220209 (https://download.01.org/0day-ci/archive/20220209/202202092107.WdTEsmSF-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project e8bff9ae54a55b4dbfeb6ba55f723abbd81bf494)
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/peterz/queue.git/commit/?id=bf8d9ef490e0600b3b30ac2244858ecd327123ab
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/core
        git checkout bf8d9ef490e0600b3b30ac2244858ecd327123ab
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/sched/

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 >>):

>> kernel/sched/fair.c:230:2: error: implicit declaration of function 'sched_cfs_bandwidth_sysctl_init' [-Werror,-Wimplicit-function-declaration]
           sched_cfs_bandwidth_sysctl_init();
           ^
   kernel/sched/fair.c:652:5: warning: no previous prototype for function 'sched_update_scaling' [-Wmissing-prototypes]
   int sched_update_scaling(void)
       ^
   kernel/sched/fair.c:652:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_update_scaling(void)
   ^
   static 
   kernel/sched/fair.c:5469:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes]
   void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
        ^
   kernel/sched/fair.c:5469:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
   ^
   static 
   kernel/sched/fair.c:11694:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes]
   void free_fair_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/fair.c:11694:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void free_fair_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/fair.c:11696:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes]
   int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
       ^
   kernel/sched/fair.c:11696:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
   ^
   static 
   kernel/sched/fair.c:11701:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes]
   void online_fair_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/fair.c:11701:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void online_fair_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/fair.c:11703:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes]
   void unregister_fair_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/fair.c:11703:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void unregister_fair_sched_group(struct task_group *tg) { }
   ^
   static 
   6 warnings and 1 error generated.


vim +/sched_cfs_bandwidth_sysctl_init +230 kernel/sched/fair.c

   226	
   227	void __init sched_init_granularity(void)
   228	{
   229		update_sysctl();
 > 230		sched_cfs_bandwidth_sysctl_init();
   231	}
   232	

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