Hi, I love your patch! Yet something to improve: [auto build test ERROR on tip/core/rcu] url: https://github.com/0day-ci/linux/commits/paulmck-kernel-org/torture-Remov... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git cb3cb6733fbd8fd8d2c716095fdca42dadba2063 config: nios2-allyesconfig (attached as .config) compiler: nios2-linux-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2

If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from include/linux/kernel.h:15, from kernel/rcu/rcutorture.c:16: kernel/rcu/rcutorture.c: In function 'rcu_torture_stats_print': >> kernel/rcu/rcutorture.c:1538:3: error: implicit declaration of function 'data_race' [-Werror=implicit-function-declaration] 1538 | data_race(n_barrier_successes), | ^~~~~~~~~ include/linux/printk.h:312:26: note: in definition of macro 'pr_cont' 312 | printk(KERN_CONT fmt, ##__VA_ARGS__) | ^~~~~~~~~~~ In file included from include/linux/printk.h:7, from include/linux/kernel.h:15, from kernel/rcu/rcutorture.c:16: >> include/linux/kern_levels.h:5:18: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:24:19: note: in expansion of macro 'KERN_SOH' 24 | #define KERN_CONT KERN_SOH "c" | ^~~~~~~~ include/linux/printk.h:312:9: note: in expansion of macro 'KERN_CONT' 312 | printk(KERN_CONT fmt, ##__VA_ARGS__) | ^~~~~~~~~ >> kernel/rcu/rcutorture.c:1537:2: note: in expansion of macro 'pr_cont' 1537 | pr_cont("barrier: %ld/%ld:%ld ", | ^~~~~~~ kernel/rcu/rcutorture.c:1537:22: note: format string is defined here 1537 | pr_cont("barrier: %ld/%ld:%ld ", | ~~^ | | | long int | %d In file included from include/linux/printk.h:7, from include/linux/kernel.h:15, from kernel/rcu/rcutorture.c:16: include/linux/kern_levels.h:5:18: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:24:19: note: in expansion of macro 'KERN_SOH' 24 | #define KERN_CONT KERN_SOH "c" | ^~~~~~~~ include/linux/printk.h:312:9: note: in expansion of macro 'KERN_CONT' 312 | printk(KERN_CONT fmt, ##__VA_ARGS__) | ^~~~~~~~~ >> kernel/rcu/rcutorture.c:1537:2: note: in expansion of macro 'pr_cont' 1537 | pr_cont("barrier: %ld/%ld:%ld ", | ^~~~~~~ kernel/rcu/rcutorture.c:1537:26: note: format string is defined here 1537 | pr_cont("barrier: %ld/%ld:%ld ", | ~~^ | | | long int | %d In file included from include/linux/printk.h:7, from include/linux/kernel.h:15, from kernel/rcu/rcutorture.c:16: include/linux/kern_levels.h:5:18: warning: format '%ld' expects argument of type 'long int', but argument 4 has type 'int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:24:19: note: in expansion of macro 'KERN_SOH' 24 | #define KERN_CONT KERN_SOH "c" | ^~~~~~~~ include/linux/printk.h:312:9: note: in expansion of macro 'KERN_CONT' 312 | printk(KERN_CONT fmt, ##__VA_ARGS__) | ^~~~~~~~~ >> kernel/rcu/rcutorture.c:1537:2: note: in expansion of macro 'pr_cont' 1537 | pr_cont("barrier: %ld/%ld:%ld ", | ^~~~~~~ kernel/rcu/rcutorture.c:1537:30: note: format string is defined here 1537 | pr_cont("barrier: %ld/%ld:%ld ", | ~~^ | | | long int | %d In file included from include/linux/printk.h:7, from include/linux/kernel.h:15, from kernel/rcu/rcutorture.c:16: >> include/linux/kern_levels.h:5:18: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:24:19: note: in expansion of macro 'KERN_SOH' 24 | #define KERN_CONT KERN_SOH "c" | ^~~~~~~~ include/linux/printk.h:312:9: note: in expansion of macro 'KERN_CONT' 312 | printk(KERN_CONT fmt, ##__VA_ARGS__) | ^~~~~~~~~ kernel/rcu/rcutorture.c:1541:2: note: in expansion of macro 'pr_cont' 1541 | pr_cont("read-exits: %ld\n", data_race(n_read_exits)); | ^~~~~~~ kernel/rcu/rcutorture.c:1541:25: note: format string is defined here 1541 | pr_cont("read-exits: %ld\n", data_race(n_read_exits)); | ~~^ | | | long int | %d cc1: some warnings being treated as errors vim +/data_race +1538 kernel/rcu/rcutorture.c a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1485 a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1486 /* eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1487 * Print torture statistics. Caller must ensure that there is only eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1488 * one call to this function at a given time!!! This is normally eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1489 * accomplished by relying on the module system to only have one copy eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1490 * of the module loaded, and then by giving the rcu_torture_stats eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1491 * kthread full control (or the init/cleanup functions when rcu_torture_stats eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1492 * thread is not running). a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1493 */ d10089508613f4 kernel/rcu/torture.c Chen Gang 2013-11-07 1494 static void eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1495 rcu_torture_stats_print(void) a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1496 { a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1497 int cpu; a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1498 int i; a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1499 long pipesummary[RCU_TORTURE_PIPE_LEN + 1] = { 0 }; a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1500 long batchsummary[RCU_TORTURE_PIPE_LEN + 1] = { 0 }; 5396d31d3a3960 kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-08 1501 struct rcu_torture *rtcp; ad0dc7f94dbf41 kernel/rcu/rcutorture.c Paul E. McKenney 2014-02-19 1502 static unsigned long rtcv_snap = ULONG_MAX; 0032f4e889764d kernel/rcu/rcutorture.c Paul E. McKenney 2017-08-30 1503 static bool splatted; 4ffa66992476c9 kernel/rcu/rcutorture.c Paul E. McKenney 2016-06-30 1504 struct task_struct *wtp; a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1505 0a945022778f10 kernel/rcutorture.c KAMEZAWA Hiroyuki 2006-03-28 1506 for_each_possible_cpu(cpu) { a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1507 for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) { f042a436c8dc9f kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-03 1508 pipesummary[i] += READ_ONCE(per_cpu(rcu_torture_count, cpu)[i]); f042a436c8dc9f kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-03 1509 batchsummary[i] += READ_ONCE(per_cpu(rcu_torture_batch, cpu)[i]); a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1510 } a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1511 } a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1512 for (i = RCU_TORTURE_PIPE_LEN - 1; i >= 0; i--) { a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1513 if (pipesummary[i] != 0) a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1514 break; a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1515 } eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1516 eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1517 pr_alert("%s%s ", torture_type, TORTURE_FLAG); 5396d31d3a3960 kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-08 1518 rtcp = rcu_access_pointer(rcu_torture_current); 354ea05d027638 kernel/rcu/rcutorture.c Paul E. McKenney 2019-05-25 1519 pr_cont("rtc: %p %s: %lu tfle: %d rta: %d rtaf: %d rtf: %d ", 5396d31d3a3960 kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-08 1520 rtcp, 5396d31d3a3960 kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-08 1521 rtcp && !rcu_stall_is_suppressed_at_boot() ? "ver" : "VER", a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1522 rcu_torture_current_version, a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1523 list_empty(&rcu_torture_freelist), a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1524 atomic_read(&n_rcu_torture_alloc), a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1525 atomic_read(&n_rcu_torture_alloc_fail), 5cf05ad758c30d kernel/rcutorture.c Paul E. McKenney 2012-05-17 1526 atomic_read(&n_rcu_torture_free)); 472213a675e211 kernel/rcu/rcutorture.c SeongJae Park 2016-08-13 1527 pr_cont("rtmbe: %d rtbe: %ld rtbke: %ld rtbre: %ld ", 0729fbf3bc7087 kernel/rcutorture.c Paul E. McKenney 2008-06-25 1528 atomic_read(&n_rcu_torture_mberror), 472213a675e211 kernel/rcu/rcutorture.c SeongJae Park 2016-08-13 1529 n_rcu_torture_barrier_error, 8e8be45e8e55da kernel/rcutorture.c Paul E. McKenney 2010-09-02 1530 n_rcu_torture_boost_ktrerror, 5cf05ad758c30d kernel/rcutorture.c Paul E. McKenney 2012-05-17 1531 n_rcu_torture_boost_rterror); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1532 pr_cont("rtbf: %ld rtb: %ld nt: %ld ", 8e8be45e8e55da kernel/rcutorture.c Paul E. McKenney 2010-09-02 1533 n_rcu_torture_boost_failure, 8e8be45e8e55da kernel/rcutorture.c Paul E. McKenney 2010-09-02 1534 n_rcu_torture_boosts, 8da9a59523b660 kernel/rcu/rcutorture.c Paul E. McKenney 2018-05-22 1535 atomic_long_read(&n_rcu_torture_timers)); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1536 torture_onoff_stats(); d038b6ee14fb01 kernel/rcu/rcutorture.c Paul E. McKenney 2020-06-22 @1537 pr_cont("barrier: %ld/%ld:%ld ", c9527bebb017b8 kernel/rcu/rcutorture.c Paul E. McKenney 2020-02-18 @1538 data_race(n_barrier_successes), c9527bebb017b8 kernel/rcu/rcutorture.c Paul E. McKenney 2020-02-18 1539 data_race(n_barrier_attempts), c9527bebb017b8 kernel/rcu/rcutorture.c Paul E. McKenney 2020-02-18 1540 data_race(n_rcu_torture_barrier_error)); d038b6ee14fb01 kernel/rcu/rcutorture.c Paul E. McKenney 2020-06-22 1541 pr_cont("read-exits: %ld\n", data_race(n_read_exits)); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1542 eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1543 pr_alert("%s%s ", torture_type, TORTURE_FLAG); 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1544 if (atomic_read(&n_rcu_torture_mberror) || 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1545 n_rcu_torture_barrier_error || n_rcu_torture_boost_ktrerror || 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1546 n_rcu_torture_boost_rterror || n_rcu_torture_boost_failure || fae4b54f28f034 kernel/rcutorture.c Paul E. McKenney 2012-02-20 1547 i > 1) { eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1548 pr_cont("%s", "!!! "); 996417d2c4eb58 kernel/rcutorture.c Paul E. McKenney 2005-11-18 1549 atomic_inc(&n_rcu_torture_error); 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1550 WARN_ON_ONCE(atomic_read(&n_rcu_torture_mberror)); 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1551 WARN_ON_ONCE(n_rcu_torture_barrier_error); // rcu_barrier() 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1552 WARN_ON_ONCE(n_rcu_torture_boost_ktrerror); // no boost kthread 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1553 WARN_ON_ONCE(n_rcu_torture_boost_rterror); // can't set RT prio 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1554 WARN_ON_ONCE(n_rcu_torture_boost_failure); // RCU boost failed 8b5ddf8b99dc42 kernel/rcu/rcutorture.c Paul E. McKenney 2019-08-14 1555 WARN_ON_ONCE(i > 1); // Too-short grace period 996417d2c4eb58 kernel/rcutorture.c Paul E. McKenney 2005-11-18 1556 } eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1557 pr_cont("Reader Pipe: "); a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1558 for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1559 pr_cont(" %ld", pipesummary[i]); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1560 pr_cont("\n"); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1561 eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1562 pr_alert("%s%s ", torture_type, TORTURE_FLAG); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1563 pr_cont("Reader Batch: "); 72e9bb549280b3 kernel/rcutorture.c Paul E. McKenney 2006-06-27 1564 for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1565 pr_cont(" %ld", batchsummary[i]); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1566 pr_cont("\n"); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1567 eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1568 pr_alert("%s%s ", torture_type, TORTURE_FLAG); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1569 pr_cont("Free-Block Circulation: "); a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1570 for (i = 0; i < RCU_TORTURE_PIPE_LEN + 1; i++) { eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1571 pr_cont(" %d", atomic_read(&rcu_torture_wcount[i])); a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1572 } eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1573 pr_cont("\n"); eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1574 c8e5b163101c5d kernel/rcutorture.c Josh Triplett 2007-05-08 1575 if (cur_ops->stats) eea203fea34845 kernel/rcu/rcutorture.c Joe Perches 2014-07-14 1576 cur_ops->stats(); ad0dc7f94dbf41 kernel/rcu/rcutorture.c Paul E. McKenney 2014-02-19 1577 if (rtcv_snap == rcu_torture_current_version && 5396d31d3a3960 kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-08 1578 rcu_access_pointer(rcu_torture_current) && 5396d31d3a3960 kernel/rcu/rcutorture.c Paul E. McKenney 2020-01-08 1579 !rcu_stall_is_suppressed()) { 7f6733c3c648dd kernel/rcu/rcutorture.c Paul E. McKenney 2017-04-18 1580 int __maybe_unused flags = 0; aebc82644b2c8e kernel/rcu/rcutorture.c Paul E. McKenney 2018-05-01 1581 unsigned long __maybe_unused gp_seq = 0; ad0dc7f94dbf41 kernel/rcu/rcutorture.c Paul E. McKenney 2014-02-19 1582 ad0dc7f94dbf41 kernel/rcu/rcutorture.c Paul E. McKenney 2014-02-19 1583 rcutorture_get_gp_data(cur_ops->ttype, aebc82644b2c8e kernel/rcu/rcutorture.c Paul E. McKenney 2018-05-01 1584 &flags, &gp_seq); 7f6733c3c648dd kernel/rcu/rcutorture.c Paul E. McKenney 2017-04-18 1585 srcutorture_get_gp_data(cur_ops->ttype, srcu_ctlp, aebc82644b2c8e kernel/rcu/rcutorture.c Paul E. McKenney 2018-05-01 1586 &flags, &gp_seq); 4ffa66992476c9 kernel/rcu/rcutorture.c Paul E. McKenney 2016-06-30 1587 wtp = READ_ONCE(writer_task); aebc82644b2c8e kernel/rcu/rcutorture.c Paul E. McKenney 2018-05-01 1588 pr_alert("??? Writer stall state %s(%d) g%lu f%#x ->state %#lx cpu %d\n", 18aff33e731425 kernel/rcu/rcutorture.c Paul E. McKenney 2015-11-17 1589 rcu_torture_writer_state_getname(), aebc82644b2c8e kernel/rcu/rcutorture.c Paul E. McKenney 2018-05-01 1590 rcu_torture_writer_state, gp_seq, flags, 808de39cf422aa kernel/rcu/rcutorture.c Paul E. McKenney 2017-06-19 1591 wtp == NULL ? ~0UL : wtp->state, 808de39cf422aa kernel/rcu/rcutorture.c Paul E. McKenney 2017-06-19 1592 wtp == NULL ? -1 : (int)task_cpu(wtp)); 0032f4e889764d kernel/rcu/rcutorture.c Paul E. McKenney 2017-08-30 1593 if (!splatted && wtp) { 0032f4e889764d kernel/rcu/rcutorture.c Paul E. McKenney 2017-08-30 1594 sched_show_task(wtp); 0032f4e889764d kernel/rcu/rcutorture.c Paul E. McKenney 2017-08-30 1595 splatted = true; 0032f4e889764d kernel/rcu/rcutorture.c Paul E. McKenney 2017-08-30 1596 } afea227fd4acf4 kernel/rcu/rcutorture.c Paul E. McKenney 2014-03-12 1597 show_rcu_gp_kthreads(); 274529ba9bda86 kernel/rcu/rcutorture.c Paul E. McKenney 2016-03-21 1598 rcu_ftrace_dump(DUMP_ALL); ad0dc7f94dbf41 kernel/rcu/rcutorture.c Paul E. McKenney 2014-02-19 1599 } ad0dc7f94dbf41 kernel/rcu/rcutorture.c Paul E. McKenney 2014-02-19 1600 rtcv_snap = rcu_torture_current_version; a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1601 } a241ec65aeac3d kernel/rcutorture.c Paul E. McKenney 2005-10-30 1602 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org