linux-kernel - [ammarfaizi2-block:google/android/kernel/common/android-4.19-stable 204/9999] kernel/sched/stubs.c:8:5: warning: no previous prototype for 'sched_isolate

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Date:   Sat, 22 Jan 2022 07:58:54 +0800
From:   kernel test robot <lkp@...el.com>
To:     Quentin Perret <qperret@...gle.com>
Cc:     kbuild-all@...ts.01.org, GNU/Weeb Mailing List <gwml@...weeb.org>,
        linux-kernel@...r.kernel.org,
        Saravana Kannan <saravanak@...gle.com>
Subject: [ammarfaizi2-block:google/android/kernel/common/android-4.19-stable
 204/9999] kernel/sched/stubs.c:8:5: warning: no previous prototype for
 'sched_isolate_cpu'

Hi Quentin,

FYI, the error/warning still remains.

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-4.19-stable
head:   90a691fca4c2525068d9908ac203e9f09e4e33c0
commit: eead51495c8760858c32d9ad0332ffc94397aa82 [204/9999] ANDROID: GKI: sched: stub sched_isolate symbols
config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220122/202201220740.3itLwKmy-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/ammarfaizi2/linux-block/commit/eead51495c8760858c32d9ad0332ffc94397aa82
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-4.19-stable
        git checkout eead51495c8760858c32d9ad0332ffc94397aa82
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/nvmem/ kernel/sched/

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 >>):

>> kernel/sched/stubs.c:8:5: warning: no previous prototype for 'sched_isolate_cpu' [-Wmissing-prototypes]
       8 | int sched_isolate_cpu(int cpu)
         |     ^~~~~~~~~~~~~~~~~
>> kernel/sched/stubs.c:14:5: warning: no previous prototype for 'sched_unisolate_cpu_unlocked' [-Wmissing-prototypes]
      14 | int sched_unisolate_cpu_unlocked(int cpu)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/sched/stubs.c:20:5: warning: no previous prototype for 'sched_unisolate_cpu' [-Wmissing-prototypes]
      20 | int sched_unisolate_cpu(int cpu)
         |     ^~~~~~~~~~~~~~~~~~~
>> kernel/sched/stubs.c:26:5: warning: no previous prototype for 'set_task_boost' [-Wmissing-prototypes]
      26 | int set_task_boost(int boost, u64 period)
         |     ^~~~~~~~~~~~~~


vim +/sched_isolate_cpu +8 kernel/sched/stubs.c

     7	
   > 8	int sched_isolate_cpu(int cpu)
     9	{
    10		return -EINVAL;
    11	}
    12	EXPORT_SYMBOL_GPL(sched_isolate_cpu);
    13	
  > 14	int sched_unisolate_cpu_unlocked(int cpu)
    15	{
    16		return -EINVAL;
    17	}
    18	EXPORT_SYMBOL_GPL(sched_unisolate_cpu_unlocked);
    19	
  > 20	int sched_unisolate_cpu(int cpu)
    21	{
    22		return -EINVAL;
    23	}
    24	EXPORT_SYMBOL_GPL(sched_unisolate_cpu);
    25	
  > 26	int set_task_boost(int boost, u64 period)

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