Messages in this thread | | | Date | Fri, 5 Jun 2020 17:19:14 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [rcu:dev.2020.06.02a 67/90] kernel/rcu/rcuperf.c:727:38: warning: format specifies type 'size_t' (aka 'unsigned int') but the argument has type 'unsigned long' |
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On Sat, Jun 06, 2020 at 07:07:10AM +0800, kernel test robot wrote: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.06.02a > head: 5216948905dd07a84cef8a7dc72c2ec076802efd > commit: 7d16add62717136b1839f0b3d7ea4cbb98f38c2a [67/90] rcuperf: Fix kfree_mult to match printk() format > config: arm-randconfig-r004-20200605 (attached as .config) > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 6dd738e2f0609f7d3313b574a1d471263d2d3ba1) > 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 arm cross compiling tool for clang build > # apt-get install binutils-arm-linux-gnueabi > git checkout 7d16add62717136b1839f0b3d7ea4cbb98f38c2a > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@intel.com>
Adding Kefeng on CC. Kefeng, thoughts?
Thanx, Paul
> All warnings (new ones prefixed by >>, old ones prefixed by <<): > > >> kernel/rcu/rcuperf.c:727:38: warning: format specifies type 'size_t' (aka 'unsigned int') but the argument has type 'unsigned long' [-Wformat] > pr_alert("kfree object size=%zun", kfree_mult * sizeof(struct kfree_obj)); > ~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > %lu > include/linux/printk.h:295:35: note: expanded from macro 'pr_alert' > printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) > ~~~ ^~~~~~~~~~~ > 1 warning generated. > > vim +727 kernel/rcu/rcuperf.c > > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 709) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 710) static int __init > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 711) kfree_perf_init(void) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 712) { > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 713) long i; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 714) int firsterr = 0; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 715) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 716) kfree_nrealthreads = compute_real(kfree_nthreads); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 717) /* Start up the kthreads. */ > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 718) if (shutdown) { > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 719) init_waitqueue_head(&shutdown_wq); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 720) firsterr = torture_create_kthread(kfree_perf_shutdown, NULL, > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 721) shutdown_task); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 722) if (firsterr) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 723) goto unwind; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 724) schedule_timeout_uninterruptible(1); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 725) } > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 726) > b3e2d20973db3e Kefeng Wang 2020-04-17 @727 pr_alert("kfree object size=%zu\n", kfree_mult * sizeof(struct kfree_obj)); > f87dc808009ac8 Joel Fernandes (Google 2020-03-16 728) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 729) kfree_reader_tasks = kcalloc(kfree_nrealthreads, sizeof(kfree_reader_tasks[0]), > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 730) GFP_KERNEL); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 731) if (kfree_reader_tasks == NULL) { > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 732) firsterr = -ENOMEM; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 733) goto unwind; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 734) } > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 735) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 736) for (i = 0; i < kfree_nrealthreads; i++) { > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 737) firsterr = torture_create_kthread(kfree_perf_thread, (void *)i, > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 738) kfree_reader_tasks[i]); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 739) if (firsterr) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 740) goto unwind; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 741) } > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 742) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 743) while (atomic_read(&n_kfree_perf_thread_started) < kfree_nrealthreads) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 744) schedule_timeout_uninterruptible(1); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 745) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 746) torture_init_end(); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 747) return 0; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 748) > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 749) unwind: > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 750) torture_init_end(); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 751) kfree_perf_cleanup(); > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 752) return firsterr; > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 753) } > e6e78b004fa7e0 Joel Fernandes (Google 2019-08-30 754) > > :::::: The code at line 727 was first introduced by commit > :::::: b3e2d20973db3ec87a6dd2fee0c88d3c2e7c2f61 rcuperf: Fix printk format warning > > :::::: TO: Kefeng Wang <wangkefeng.wang@huawei.com> > :::::: CC: Paul E. McKenney <paulmck@kernel.org> > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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