tree: https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git asym32 head: be20cb98fbdf590a335cb6dfa06090cc9ea8b661 commit: 97662cafd0d41ed3d4b69cf0ff71fe98243a08dd [14/21] freezer: Add frozen_or_skipped() helper function config: arm64-randconfig-r025-20210514 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 425781bce01f2f1d5f553d3b2bf9ebbd6e15068c) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/commit/?id... git remote add arm-perf https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git git fetch --no-tags arm-perf asym32 git checkout 97662cafd0d41ed3d4b69cf0ff71fe98243a08dd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 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 >>): if (unlikely(frozen_or_skipped(t))) ^ 1 error generated. vim +/frozen_or_skipped +95 kernel/hung_task.c 86 87 static void check_hung_task(struct task_struct *t, unsigned long timeout) 88 { 89 unsigned long switch_count = t->nvcsw + t->nivcsw; 90 91 /* 92 * Ensure the task is not frozen. 93 * Also, skip vfork and any other user process that freezer should skip. 94 */ 96 return; 97 98 /* 99 * When a freshly created task is scheduled once, changes its state to 100 * TASK_UNINTERRUPTIBLE without having ever been switched out once, it 101 * musn't be checked. 102 */ 103 if (unlikely(!switch_count)) 104 return; 105 106 if (switch_count != t->last_switch_count) { 107 t->last_switch_count = switch_count; 108 t->last_switch_time = jiffies; 109 return; 110 } 111 if (time_is_after_jiffies(t->last_switch_time + timeout * HZ)) 112 return; 113 114 trace_sched_process_hang(t); 115 116 if (sysctl_hung_task_panic) { 117 console_verbose(); 118 hung_task_show_lock = true; 119 hung_task_call_panic = true; 120 } 121 122 /* 123 * Ok, the task did not get scheduled for more than 2 minutes, 124 * complain: 125 */ 126 if (sysctl_hung_task_warnings) { 127 if (sysctl_hung_task_warnings > 0) 128 sysctl_hung_task_warnings--; 129 pr_err("INFO: task %s:%d blocked for more than %ld seconds.\n", 130 t->comm, t->pid, (jiffies - t->last_switch_time) / HZ); 131 pr_err(" %s %s %.*s\n", 132 print_tainted(), init_utsname()->release, 133 (int)strcspn(init_utsname()->version, " "), 134 init_utsname()->version); 135 pr_err("\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\"" 136 " disables this message.\n"); 137 sched_show_task(t); 138 hung_task_show_lock = true; 139 140 if (sysctl_hung_task_all_cpu_backtrace) 141 hung_task_show_all_bt = true; 142 } 143 144 touch_nmi_watchdog(); 145 } 146 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org