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/?... 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(a)intel.com&gt; All warnings (new ones prefixed by >>): 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 169 171 { 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@lists.01.org