Hi tip-bot2, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [cannot apply to v5.3-rc6 next-20190827] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/tip-bot2-for-Thomas-Gleixner/posix-cpu-timers-Use-common-permission-check-in-posix_cpu_clock_get/20190829-181227 config: nds32-defconfig (attached as .config) compiler: nds32le-linux-gcc (GCC) 8.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=8.1.0 make.cross ARCH=nds32 If you fix the issue, kindly add following tag Reported-by: kbuild test robot All warnings (new ones prefixed by >>): kernel/time/posix-cpu-timers.c: In function 'posix_cpu_clock_get': kernel/time/posix-cpu-timers.c:275:8: error: implicit declaration of function 'get_task_for_clock'; did you mean 'get_task_struct'? [-Werror=implicit-function-declaration] tsk = get_task_for_clock(clock); ^~~~~~~~~~~~~~~~~~ get_task_struct >> kernel/time/posix-cpu-timers.c:275:6: warning: assignment to 'struct task_struct *' from 'int' makes pointer from integer without a cast [-Wint-conversion] tsk = get_task_for_clock(clock); ^ cc1: some warnings being treated as errors vim +275 kernel/time/posix-cpu-timers.c 268 269 static int posix_cpu_clock_get(const clockid_t clock, struct timespec64 *tp) 270 { 271 const clockid_t clkid = CPUCLOCK_WHICH(clock); 272 struct task_struct *tsk; 273 u64 t; 274 > 275 tsk = get_task_for_clock(clock); 276 if (!tsk) 277 return -EINVAL; 278 279 if (CPUCLOCK_PERTHREAD(clock)) 280 cpu_clock_sample(clkid, tsk, &t); 281 else 282 cpu_clock_sample_group(clkid, tsk, &t); 283 put_task_struct(tsk); 284 285 *tp = ns_to_timespec64(t); 286 return 0; 287 } 288 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation