Hi "Joel, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.19-rc3 next-20220622] [cannot apply to paulmck-rcu/dev] [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/intel-lab-lkp/linux/commits/Joel-Fernandes-Google/Implement-call_rcu_lazy-and-miscellaneous-fixes/20220623-065447 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git de5c208d533a46a074eb46ea17f672cc005a7269 config: s390-randconfig-r044-20220622 (https://download.01.org/0day-ci/archive/20220623/202206231028.gVHd7wR5-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 46be5faaf03466c3751f8a2882bef5a217e15926) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/6c59cb940f39b882c20e6858c41df7c1470b930a git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Joel-Fernandes-Google/Implement-call_rcu_lazy-and-miscellaneous-fixes/20220623-065447 git checkout 6c59cb940f39b882c20e6858c41df7c1470b930a # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: kernel/rcu/rcuscale.o: in function `kfree_scale_init': >> kernel/rcu/rcuscale.c:810: undefined reference to `rcu_scale_get_jiffies_till_flush' >> /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: kernel/rcu/rcuscale.c:813: undefined reference to `rcu_scale_set_jiffies_till_flush' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: kernel/rcu/rcuscale.c:822: undefined reference to `rcu_scale_set_jiffies_till_flush' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: certs/system_keyring.o: in function `load_system_certificate_list': certs/system_keyring.c:207: undefined reference to `x509_load_certificate_list' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: drivers/dma/fsl-edma.o: in function `fsl_edma_probe': drivers/dma/fsl-edma.c:302: undefined reference to `devm_ioremap_resource' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: drivers/dma/fsl-edma.c:327: undefined reference to `devm_ioremap_resource' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: drivers/dma/idma64.o: in function `idma64_platform_probe': drivers/dma/idma64.c:644: undefined reference to `devm_ioremap_resource' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_init': drivers/clocksource/timer-of.c:151: undefined reference to `iounmap' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_base_init': drivers/clocksource/timer-of.c:159: undefined reference to `of_iomap' /opt/cross/gcc-11.3.0-nolibc/s390x-linux/bin/s390x-linux-ld: drivers/clocksource/timer-of.o: in function `timer_of_cleanup': drivers/clocksource/timer-of.c:151: undefined reference to `iounmap' vim +810 kernel/rcu/rcuscale.c 794 795 static int __init 796 kfree_scale_init(void) 797 { 798 long i; 799 int firsterr = 0; 800 unsigned long orig_jif, jif_start; 801 802 // Force all call_rcu() to call_rcu_lazy() so that non-lazy CBs 803 // do not remove laziness of the lazy ones (since the test tries 804 // to stress call_rcu_lazy() for OOM). 805 // 806 // Also, do a quick self-test to ensure laziness is as much as 807 // expected. 808 if (kfree_rcu_by_lazy) { 809 /* do a test to check the timeout. */ > 810 orig_jif = rcu_scale_get_jiffies_till_flush(); 811 812 rcu_force_call_rcu_to_lazy(true); > 813 rcu_scale_set_jiffies_till_flush(2 * HZ); 814 rcu_barrier(); 815 816 jif_start = jiffies; 817 jiffies_at_lazy_cb = 0; 818 call_rcu_lazy(&lazy_test1_rh, call_rcu_lazy_test1); 819 820 smp_cond_load_relaxed(&rcu_lazy_test1_cb_called, VAL == 1); 821 822 rcu_scale_set_jiffies_till_flush(orig_jif); 823 824 if (WARN_ON_ONCE(jiffies_at_lazy_cb - jif_start < 2 * HZ)) { 825 pr_alert("Lazy CBs are not being lazy as expected!\n"); 826 return -1; 827 } 828 829 if (WARN_ON_ONCE(jiffies_at_lazy_cb - jif_start > 3 * HZ)) { 830 pr_alert("Lazy CBs are being too lazy!\n"); 831 return -1; 832 } 833 } 834 835 kfree_nrealthreads = compute_real(kfree_nthreads); 836 /* Start up the kthreads. */ 837 if (shutdown) { 838 init_waitqueue_head(&shutdown_wq); 839 firsterr = torture_create_kthread(kfree_scale_shutdown, NULL, 840 shutdown_task); 841 if (torture_init_error(firsterr)) 842 goto unwind; 843 schedule_timeout_uninterruptible(1); 844 } 845 846 pr_alert("kfree object size=%zu, kfree_rcu_by_lazy=%d\n", 847 kfree_mult * sizeof(struct kfree_obj), 848 kfree_rcu_by_lazy); 849 850 kfree_reader_tasks = kcalloc(kfree_nrealthreads, sizeof(kfree_reader_tasks[0]), 851 GFP_KERNEL); 852 if (kfree_reader_tasks == NULL) { 853 firsterr = -ENOMEM; 854 goto unwind; 855 } 856 857 for (i = 0; i < kfree_nrealthreads; i++) { 858 firsterr = torture_create_kthread(kfree_scale_thread, (void *)i, 859 kfree_reader_tasks[i]); 860 if (torture_init_error(firsterr)) 861 goto unwind; 862 } 863 864 while (atomic_read(&n_kfree_scale_thread_started) < kfree_nrealthreads) 865 schedule_timeout_uninterruptible(1); 866 867 torture_init_end(); 868 return 0; 869 870 unwind: 871 torture_init_end(); 872 kfree_scale_cleanup(); 873 return firsterr; 874 } 875 -- 0-DAY CI Kernel Test Service https://01.org/lkp
