Re: [PATCH 2/2] sched/isolation: Add cpu_is_isolated() API

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

Hi Frederic,

I love your patch! Yet something to improve:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on horms-ipvs-next/master horms-ipvs/master linus/master v6.2-rc6 next-20230203]
[cannot apply to paulmck-rcu/dev]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Frederic-Weisbecker/sched-isolation-Merge-individual-nohz_full-features-into-a-common-housekeeping-flag/20230204-072510
patch link:    https://lore.kernel.org/r/20230203232409.163847-3-frederic%40kernel.org
patch subject: [PATCH 2/2] sched/isolation: Add cpu_is_isolated() API
config: x86_64-randconfig-a001 (https://download.01.org/0day-ci/archive/20230205/202302051316.1kdX7ylk-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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://github.com/intel-lab-lkp/linux/commit/89596a035dc10e00cb66d4e75e49d69b75413807
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Frederic-Weisbecker/sched-isolation-Merge-individual-nohz_full-features-into-a-common-housekeeping-flag/20230204-072510
        git checkout 89596a035dc10e00cb66d4e75e49d69b75413807
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   In file included from drivers/pci/pci-driver.c:15:
>> include/linux/sched/isolation.h:58:10: error: implicit declaration of function 'housekeeping_test_cpu' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) ||
                   ^
   include/linux/sched/isolation.h:58:10: note: did you mean 'housekeeping_any_cpu'?
   include/linux/sched/isolation.h:27:19: note: 'housekeeping_any_cpu' declared here
   static inline int housekeeping_any_cpu(enum hk_type type)
                     ^
   1 error generated.
--
   In file included from kernel/sched/fair.c:38:
>> include/linux/sched/isolation.h:58:10: error: implicit declaration of function 'housekeeping_test_cpu' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) ||
                   ^
   include/linux/sched/isolation.h:58:10: note: did you mean 'housekeeping_any_cpu'?
   include/linux/sched/isolation.h:27:19: note: 'housekeeping_any_cpu' declared here
   static inline int housekeeping_any_cpu(enum hk_type type)
                     ^
   kernel/sched/fair.c:688:5: warning: no previous prototype for function 'sched_update_scaling' [-Wmissing-prototypes]
   int sched_update_scaling(void)
       ^
   kernel/sched/fair.c:688:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int sched_update_scaling(void)
   ^
   static 
   1 warning and 1 error generated.


vim +/housekeeping_test_cpu +58 include/linux/sched/isolation.h

    55	
    56	static inline bool cpu_is_isolated(int cpu)
    57	{
  > 58		return !housekeeping_test_cpu(cpu, HK_TYPE_DOMAIN) ||
    59			 !housekeeping_test_cpu(cpu, HK_TYPE_KERNEL_NOISE);
    60	}
    61	

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