tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git char-misc-testing head: c248e6b8a8fe4cfe382f49324d776a04cc89c061 commit: 10f6fcd31b177c9b8efca992ec47ec30cf9ec9ed [43/50] binder: add transaction latency tracer config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 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 git checkout 10f6fcd31b177c9b8efca992ec47ec30cf9ec9ed # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): 25 | void probe_binder_txn_latency_free(void *ignore, struct binder_transaction *t, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rtc.h:38, from drivers/android/binder_internal.h:19, from drivers/android/binder_latency_tracer.c:8: drivers/android/binder_internal.h:125:23: warning: 'binder_transaction_log_fops' defined but not used [-Wunused-const-variable=] 125 | DEFINE_SHOW_ATTRIBUTE(binder_transaction_log); | ^~~~~~~~~~~~~~~~~~~~~~ include/linux/seq_file.h:173:37: note: in definition of macro 'DEFINE_SHOW_ATTRIBUTE' 173 | static const struct file_operations __name ## _fops = { \ | ^~~~~~ drivers/android/binder_internal.h:122:23: warning: 'binder_transactions_fops' defined but not used [-Wunused-const-variable=] 122 | DEFINE_SHOW_ATTRIBUTE(binder_transactions); | ^~~~~~~~~~~~~~~~~~~ include/linux/seq_file.h:173:37: note: in definition of macro 'DEFINE_SHOW_ATTRIBUTE' 173 | static const struct file_operations __name ## _fops = { \ | ^~~~~~ drivers/android/binder_internal.h:119:23: warning: 'binder_state_fops' defined but not used [-Wunused-const-variable=] 119 | DEFINE_SHOW_ATTRIBUTE(binder_state); | ^~~~~~~~~~~~ include/linux/seq_file.h:173:37: note: in definition of macro 'DEFINE_SHOW_ATTRIBUTE' 173 | static const struct file_operations __name ## _fops = { \ | ^~~~~~ drivers/android/binder_internal.h:116:23: warning: 'binder_stats_fops' defined but not used [-Wunused-const-variable=] 116 | DEFINE_SHOW_ATTRIBUTE(binder_stats); | ^~~~~~~~~~~~ include/linux/seq_file.h:173:37: note: in definition of macro 'DEFINE_SHOW_ATTRIBUTE' 173 | static const struct file_operations __name ## _fops = { \ | ^~~~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git/comm... git remote add char-misc https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git git fetch --no-tags char-misc char-misc-testing git checkout 10f6fcd31b177c9b8efca992ec47ec30cf9ec9ed vim +/probe_binder_txn_latency_free +25 drivers/android/binder_latency_tracer.c 10 11 /** 12 * The reason setting the binder_txn_latency_threshold to 2 sec 13 * is that most of timeout abort is greater or equal to 2 sec. 14 * Making it configurable to let all users determine which 15 * threshold is more suitable. 16 */ 17 static uint32_t binder_txn_latency_threshold = 2; 18 module_param_named(threshold, binder_txn_latency_threshold, 19 uint, 0644); 20 21 /* 22 * probe_binder_txn_latency_free - Output info of a delay transaction 23 * @t: pointer to the over-time transaction 24 */ 26 int from_proc, int from_thread, 27 int to_proc, int to_thread) 28 { 29 struct rtc_time tm; 30 struct timespec64 *startime; 31 struct timespec64 cur, sub_t; 32 33 ktime_get_ts64(&cur); 34 startime = &t->ts; 35 sub_t = timespec64_sub(cur, *startime); 36 37 /* if transaction time is over than binder_txn_latency_threshold (sec), 38 * show timeout warning log. 39 */ 40 if (sub_t.tv_sec < binder_txn_latency_threshold) 41 return; 42 43 rtc_time64_to_tm(t->real_ts.tv_sec, &tm); 44 45 pr_info_ratelimited("%d: from %d:%d to %d:%d", 46 t->debug_id, from_proc, from_thread, 47 to_proc, to_thread); 48 49 pr_info_ratelimited(" total %u.%03ld s code %u start %lu.%03ld android %d-%02d-%02d %02d:%02d:%02d.%03lu\n", 50 (unsigned int)sub_t.tv_sec, 51 (sub_t.tv_nsec / NSEC_PER_MSEC), 52 t->code, 53 (unsigned long)startime->tv_sec, 54 (startime->tv_nsec / NSEC_PER_MSEC), 55 (tm.tm_year + 1900), (tm.tm_mon + 1), tm.tm_mday, 56 tm.tm_hour, tm.tm_min, tm.tm_sec, 57 (unsigned long)(t->real_ts.tv_nsec / NSEC_PER_MSEC)); 58 } 59 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org