[peterz-queue:sched/wip-freezer 5/5] kernel/freezer.c:170:6: warning: no previous prototype for function '__thaw_special'

[peterz-queue:sched/wip-freezer 5/5] kernel/freezer.c:170:6: warning: no previous prototype for function '__thaw_special'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wip-freezer
head:   80cc35f267a017695070962e80478c20a69f0243
commit: 80cc35f267a017695070962e80478c20a69f0243 [5/5] freezer: Fix special_state races
config: x86_64-randconfig-a015-20210617 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=80cc35f267a017695070962e80478c20a69f0243
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/wip-freezer
        git checkout 80cc35f267a017695070962e80478c20a69f0243
        # 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 warnings (new ones prefixed by >>):

>> kernel/freezer.c:170:6: warning: no previous prototype for function '__thaw_special' [-Wmissing-prototypes]
   void __thaw_special(struct task_struct *p)
        ^
   kernel/freezer.c:170:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __thaw_special(struct task_struct *p)
   ^
   static 
   1 warning generated.


vim +/__thaw_special +170 kernel/freezer.c

   169	
 > 170	void __thaw_special(struct task_struct *p)
   171	{
   172		spin_lock(&p->sighand->siglock);
   173	
   174		if (current->ptrace) {
   175			unsigned int state = __TASK_TRACED;
   176	
   177			if (!(p->ptrace & PT_STOPPED))
   178				goto unlock;
   179	
   180			if (p->ptrace & PT_STOPPED_FATAL) {
   181				state |= TASK_WAKEKILL;
   182				if (__fatal_signal_pending(p))
   183					goto unlock;
   184			}
   185	
   186			set_special_state(state);
   187	
   188		} else if ((p->jobctl & JOBCTL_STOP_PENDING) &&
   189			   !__fatal_signal_pending(p)) {
   190	
   191			set_special_state(TASK_STOPPED);
   192		}
   193	
   194	unlock:
   195		spin_unlock(&p->sighand->siglock);
   196	}
   197	

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

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