Hi Greg, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/goldfish android-5.4 head: a11b4db23eaa21b5ff24d259cec09b1fdaaadb2a commit: 383156c695e0dae52a7c60bd3bdc8b42ecf1a54d [7458/9999] ANDROID: GKI: workqueue.h: add Android ABI padding to some structures config: powerpc-allyesconfig (attached as .config) compiler: powerpc64-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 git checkout 383156c695e0dae52a7c60bd3bdc8b42ecf1a54d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): arch/powerpc/platforms/ps3/device-init.c: In function 'ps3_register_devices': arch/powerpc/platforms/ps3/device-init.c:948:6: warning: variable 'result' set but not used [-Wunused-but-set-variable] 948 | int result; | ^~~~~~ arch/powerpc/platforms/ps3/device-init.c: In function 'ps3_probe_thread': 872 | } | ^ vim +872 arch/powerpc/platforms/ps3/device-init.c b4cb2941f85599 Geert Uytterhoeven 2008-01-19 761 ffbdd246478693 Geoff Levand 2007-06-16 762 /** ffbdd246478693 Geoff Levand 2007-06-16 763 * ps3_probe_thread - Background repository probing at system startup. ffbdd246478693 Geoff Levand 2007-06-16 764 * ffbdd246478693 Geoff Levand 2007-06-16 765 * This implementation only supports background probing on a single bus. b4cb2941f85599 Geert Uytterhoeven 2008-01-19 766 * It uses the hypervisor's storage device notification mechanism to wait until b4cb2941f85599 Geert Uytterhoeven 2008-01-19 767 * a storage device is ready. The device notification mechanism uses a b4cb2941f85599 Geert Uytterhoeven 2008-01-19 768 * pseudo device to asynchronously notify the guest when storage devices become b4cb2941f85599 Geert Uytterhoeven 2008-01-19 769 * ready. The notification device has a block size of 512 bytes. ffbdd246478693 Geoff Levand 2007-06-16 770 */ ffbdd246478693 Geoff Levand 2007-06-16 771 ffbdd246478693 Geoff Levand 2007-06-16 772 static int ps3_probe_thread(void *data) ffbdd246478693 Geoff Levand 2007-06-16 773 { b4cb2941f85599 Geert Uytterhoeven 2008-01-19 774 struct ps3_notification_device dev; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 775 int res; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 776 unsigned int irq; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 777 u64 lpar; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 778 void *buf; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 779 struct ps3_notify_cmd *notify_cmd; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 780 struct ps3_notify_event *notify_event; ffbdd246478693 Geoff Levand 2007-06-16 781 ffbdd246478693 Geoff Levand 2007-06-16 782 pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__); ffbdd246478693 Geoff Levand 2007-06-16 783 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 784 buf = kzalloc(512, GFP_KERNEL); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 785 if (!buf) b4cb2941f85599 Geert Uytterhoeven 2008-01-19 786 return -ENOMEM; ffbdd246478693 Geoff Levand 2007-06-16 787 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 788 lpar = ps3_mm_phys_to_lpar(__pa(buf)); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 789 notify_cmd = buf; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 790 notify_event = buf; ffbdd246478693 Geoff Levand 2007-06-16 791 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 792 /* dummy system bus device */ b4cb2941f85599 Geert Uytterhoeven 2008-01-19 793 dev.sbd.bus_id = (u64)data; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 794 dev.sbd.dev_id = PS3_NOTIFICATION_DEV_ID; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 795 dev.sbd.interrupt_id = PS3_NOTIFICATION_INTERRUPT_ID; ffbdd246478693 Geoff Levand 2007-06-16 796 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 797 res = lv1_open_device(dev.sbd.bus_id, dev.sbd.dev_id, 0); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 798 if (res) { b4cb2941f85599 Geert Uytterhoeven 2008-01-19 799 pr_err("%s:%u: lv1_open_device failed %s\n", __func__, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 800 __LINE__, ps3_result(res)); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 801 goto fail_free; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 802 } b4cb2941f85599 Geert Uytterhoeven 2008-01-19 803 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 804 res = ps3_sb_event_receive_port_setup(&dev.sbd, PS3_BINDING_CPU_ANY, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 805 &irq); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 806 if (res) { b4cb2941f85599 Geert Uytterhoeven 2008-01-19 807 pr_err("%s:%u: ps3_sb_event_receive_port_setup failed %d\n", b4cb2941f85599 Geert Uytterhoeven 2008-01-19 808 __func__, __LINE__, res); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 809 goto fail_close_device; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 810 } b4cb2941f85599 Geert Uytterhoeven 2008-01-19 811 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 812 spin_lock_init(&dev.lock); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 813 a3a9f3b47d12b5 Yong Zhang 2011-10-21 814 res = request_irq(irq, ps3_notification_interrupt, 0, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 815 "ps3_notification", &dev); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 816 if (res) { b4cb2941f85599 Geert Uytterhoeven 2008-01-19 817 pr_err("%s:%u: request_irq failed %d\n", __func__, __LINE__, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 818 res); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 819 goto fail_sb_event_receive_port_destroy; ffbdd246478693 Geoff Levand 2007-06-16 820 } ffbdd246478693 Geoff Levand 2007-06-16 821 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 822 /* Setup and write the request for device notification. */ b4cb2941f85599 Geert Uytterhoeven 2008-01-19 823 notify_cmd->operation_code = 0; /* must be zero */ b4cb2941f85599 Geert Uytterhoeven 2008-01-19 824 notify_cmd->event_mask = 1UL << notify_region_probe; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 825 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 826 res = ps3_notification_read_write(&dev, lpar, 1); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 827 if (res) b4cb2941f85599 Geert Uytterhoeven 2008-01-19 828 goto fail_free_irq; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 829 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 830 /* Loop here processing the requested notification events. */ b4cb2941f85599 Geert Uytterhoeven 2008-01-19 831 do { b4cb2941f85599 Geert Uytterhoeven 2008-01-19 832 try_to_freeze(); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 833 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 834 memset(notify_event, 0, sizeof(*notify_event)); ffbdd246478693 Geoff Levand 2007-06-16 835 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 836 res = ps3_notification_read_write(&dev, lpar, 0); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 837 if (res) ffbdd246478693 Geoff Levand 2007-06-16 838 break; ffbdd246478693 Geoff Levand 2007-06-16 839 5c949070c7a591 Stephen Rothwell 2009-01-13 840 pr_debug("%s:%u: notify event type 0x%llx bus id %llu dev id %llu" 5c949070c7a591 Stephen Rothwell 2009-01-13 841 " type %llu port %llu\n", __func__, __LINE__, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 842 notify_event->event_type, notify_event->bus_id, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 843 notify_event->dev_id, notify_event->dev_type, b4cb2941f85599 Geert Uytterhoeven 2008-01-19 844 notify_event->dev_port); ffbdd246478693 Geoff Levand 2007-06-16 845 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 846 if (notify_event->event_type != notify_region_probe || b4cb2941f85599 Geert Uytterhoeven 2008-01-19 847 notify_event->bus_id != dev.sbd.bus_id) { f2c2cbcc35d47f Joe Perches 2016-10-24 848 pr_warn("%s:%u: bad notify_event: event %llu, dev_id %llu, dev_type %llu\n", b4cb2941f85599 Geert Uytterhoeven 2008-01-19 849 __func__, __LINE__, notify_event->event_type, f2c2cbcc35d47f Joe Perches 2016-10-24 850 notify_event->dev_id, notify_event->dev_type); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 851 continue; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 852 } b4cb2941f85599 Geert Uytterhoeven 2008-01-19 853 972b1f040c8698 Geert Uytterhoeven 2008-01-19 854 ps3_find_and_add_device(dev.sbd.bus_id, notify_event->dev_id); ffbdd246478693 Geoff Levand 2007-06-16 855 ffbdd246478693 Geoff Levand 2007-06-16 856 } while (!kthread_should_stop()); ffbdd246478693 Geoff Levand 2007-06-16 857 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 858 fail_free_irq: b4cb2941f85599 Geert Uytterhoeven 2008-01-19 859 free_irq(irq, &dev); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 860 fail_sb_event_receive_port_destroy: b4cb2941f85599 Geert Uytterhoeven 2008-01-19 861 ps3_sb_event_receive_port_destroy(&dev.sbd, irq); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 862 fail_close_device: b4cb2941f85599 Geert Uytterhoeven 2008-01-19 863 lv1_close_device(dev.sbd.bus_id, dev.sbd.dev_id); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 864 fail_free: b4cb2941f85599 Geert Uytterhoeven 2008-01-19 865 kfree(buf); b4cb2941f85599 Geert Uytterhoeven 2008-01-19 866 b4cb2941f85599 Geert Uytterhoeven 2008-01-19 867 probe_task = NULL; b4cb2941f85599 Geert Uytterhoeven 2008-01-19 868 ffbdd246478693 Geoff Levand 2007-06-16 869 pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__); ffbdd246478693 Geoff Levand 2007-06-16 870 ffbdd246478693 Geoff Levand 2007-06-16 871 return 0; ffbdd246478693 Geoff Levand 2007-06-16 @872 } ffbdd246478693 Geoff Levand 2007-06-16 873 :::::: The code at line 872 was first introduced by commit :::::: ffbdd246478693673adcfe1c34b29714cf25dadd [POWERPC] PS3: Device registration routines. :::::: TO: Geoff Levand <geoffrey.levand(a)am.sony.com&gt; :::::: CC: Paul Mackerras <paulus(a)samba.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org