tree: https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20210910-sysfs-generic-deadlock-fix head: 13abd44a9d3bec85045cb6410d2bb1c56d169c5c commit: ef91c4485e77ae1fdb9dcadfbd2be17c80407ec3 [3/10] selftests: add tests_sysfs module config: x86_64-randconfig-c003-20210911 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/com... git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git git fetch --no-tags mcgrof-next 20210910-sysfs-generic-deadlock-fix git checkout ef91c4485e77ae1fdb9dcadfbd2be17c80407ec3 # save the attached .config to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: lib/test_sysfs.o: in function `unregister_test_dev_sysfs_block': ld: lib/test_sysfs.o: in function `sysfs_test_dev_alloc_blockdev': ld: lib/test_sysfs.c:706: undefined reference to `blk_queue_flag_set' ld: lib/test_sysfs.o: in function `register_test_dev_sysfs_block': vim +839 lib/test_sysfs.c 683 684 static int sysfs_test_dev_alloc_blockdev(struct sysfs_test_device *test_dev) 685 { 686 int ret = -ENOMEM; 687 689 if (!test_dev->disk) { 690 pr_err("Error allocating disk structure for device %d\n", 691 test_dev->dev_idx); 692 goto out; 693 } 694 695 test_dev->disk->major = sysfs_test_major; 696 test_dev->disk->first_minor = test_dev->dev_idx + 1; 697 test_dev->disk->fops = &sysfs_testdev_ops; 698 test_dev->disk->private_data = test_dev; 699 snprintf(test_dev->disk->disk_name, 16, "test_sysfs%d", 700 test_dev->dev_idx); 706 blk_queue_flag_set(QUEUE_FLAG_DISCARD, test_dev->disk->queue); 707 708 return 0; 709 out: 710 return ret; 711 } 712 713 static struct sysfs_test_device *alloc_test_dev_sysfs(int idx) 714 { 715 struct sysfs_test_device *test_dev; 716 int ret; 717 718 switch (test_devtype) { 719 case TESTDEV_TYPE_MISC: 720 fallthrough; 721 case TESTDEV_TYPE_BLOCK: 722 break; 723 default: 724 return NULL; 725 } 726 727 test_dev = kzalloc(sizeof(struct sysfs_test_device), GFP_KERNEL); 728 if (!test_dev) 729 goto err_out; 730 731 mutex_init(&test_dev->config_mutex); 732 test_dev->dev_idx = idx; 733 test_dev->devtype = test_devtype; 734 735 if (test_dev->devtype == TESTDEV_TYPE_MISC) { 736 ret = sysfs_test_dev_alloc_miscdev(test_dev); 737 if (ret) 738 goto err_out_free; 739 } else if (test_dev->devtype == TESTDEV_TYPE_BLOCK) { 740 ret = sysfs_test_dev_alloc_blockdev(test_dev); 741 if (ret) 742 goto err_out_free; 743 } 744 return test_dev; 745 746 err_out_free: 747 kfree(test_dev); 748 test_dev = NULL; 749 err_out: 750 return NULL; 751 } 752 753 static int register_test_dev_sysfs_misc(struct sysfs_test_device *test_dev) 754 { 755 int ret; 756 757 ret = misc_register(&test_dev->misc_dev); 758 if (ret) 759 return ret; 760 761 test_dev->dev = test_dev->misc_dev.this_device; 762 763 return 0; 764 } 765 766 static int register_test_dev_sysfs_block(struct sysfs_test_device *test_dev) 767 { 769 test_dev->dev = disk_to_dev(test_dev->disk); 770 771 return 0; 772 } 773 774 static struct sysfs_test_device *register_test_dev_sysfs(void) 775 { 776 struct sysfs_test_device *test_dev = NULL; 777 int ret; 778 779 test_dev = alloc_test_dev_sysfs(0); 780 if (!test_dev) 781 goto out; 782 783 if (test_dev->devtype == TESTDEV_TYPE_MISC) { 784 ret = register_test_dev_sysfs_misc(test_dev); 785 if (ret) { 786 pr_err("could not register misc device: %d\n", ret); 787 goto out_free_dev; 788 } 789 } else if (test_dev->devtype == TESTDEV_TYPE_BLOCK) { 790 ret = register_test_dev_sysfs_block(test_dev); 791 if (ret) { 792 pr_err("could not register block device: %d\n", ret); 793 goto out_free_dev; 794 } 795 } 796 797 dev_info(test_dev->dev, "interface ready\n"); 798 799 out: 800 return test_dev; 801 out_free_dev: 802 free_test_dev_sysfs(test_dev); 803 return NULL; 804 } 805 806 static struct sysfs_test_device *register_test_dev_set_config(void) 807 { 808 struct sysfs_test_device *test_dev; 809 struct test_config *config; 810 811 test_dev = register_test_dev_sysfs(); 812 if (!test_dev) 813 return NULL; 814 815 config = &test_dev->config; 816 817 if (enable_lock) 818 config->enable_lock = true; 819 if (enable_lock_on_rmmod) 820 config->enable_lock_on_rmmod = true; 821 if (use_rtnl_lock) 822 config->use_rtnl_lock = true; 823 if (enable_busy_alloc) 824 config->enable_busy_alloc = true; 825 826 config->write_delay_msec_y = write_delay_msec_y; 827 test_sysfs_reset_vals(test_dev); 828 829 return test_dev; 830 } 831 832 static void unregister_test_dev_sysfs_misc(struct sysfs_test_device *test_dev) 833 { 834 misc_deregister(&test_dev->misc_dev); 835 } 836 837 static void unregister_test_dev_sysfs_block(struct sysfs_test_device *test_dev) 838 { 841 } 842 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org