Hi Li, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on asm-generic/master] [also build test ERROR on tip/sched/core tip/master linux/master linus/master v5.14-rc2 next-20210720] [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] url: https://github.com/0day-ci/linux/commits/Li-RongQing/sched-cpuacct-Fix-cp... base: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git master config: mips-allyesconfig (attached as .config) compiler: mips-linux-gcc (GCC) 10.3.0 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/0day-ci/linux/commit/b7cbc83d1da5b3b55713e72269c478683... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Li-RongQing/sched-cpuacct-Fix-cpuacct-charge/20210720-150427 git checkout b7cbc83d1da5b3b55713e72269c478683f02c4eb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/sched/cpuacct.c: In function 'cpuacct_charge': 344 | struct pt_regs *regs = get_irq_regs_cpu(cpu) ? : task_pt_regs(tsk); | ^~~~~~~~~~~~~~~~ | get_irq_regs kernel/sched/cpuacct.c:344:49: warning: pointer/integer type mismatch in conditional expression 344 | struct pt_regs *regs = get_irq_regs_cpu(cpu) ? : task_pt_regs(tsk); | ^ cc1: some warnings being treated as errors vim +344 kernel/sched/cpuacct.c 333 334 /* 335 * charge this task's execution time to its accounting group. 336 * 337 * called with rq->lock held. 338 */ 339 void cpuacct_charge(struct task_struct *tsk, u64 cputime) 340 { 341 struct cpuacct *ca; 342 int index = CPUACCT_STAT_SYSTEM; 343 int cpu = task_cpu(tsk); 345 346 if (regs && user_mode(regs)) 347 index = CPUACCT_STAT_USER; 348 349 rcu_read_lock(); 350 351 for (ca = task_ca(tsk); ca; ca = parent_ca(ca)) 352 __this_cpu_add(ca->cpuusage->usages[index], cputime); 353 354 rcu_read_unlock(); 355 } 356 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org