Messages in this thread Patch in this message | | | Date | Sun, 7 Jun 2020 12:00:57 -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 Fri, Jun 05, 2020 at 05:19:14PM -0700, Paul E. McKenney wrote: > 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?
Like this, perhaps?
Thanx, Paul
diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c index 962869d..dc7483a 100644 --- a/kernel/rcu/rcuperf.c +++ b/kernel/rcu/rcuperf.c @@ -724,7 +724,7 @@ kfree_perf_init(void) schedule_timeout_uninterruptible(1); } - pr_alert("kfree object size=%zu\n", kfree_mult * sizeof(struct kfree_obj)); + pr_alert("kfree object size=%zu\n", (size_t)kfree_mult * sizeof(struct kfree_obj)); kfree_reader_tasks = kcalloc(kfree_nrealthreads, sizeof(kfree_reader_tasks[0]), GFP_KERNEL); > > 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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