tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.10 head: 6f05b7df65b16790649cf27705e2eef41cf4af4a commit: 6f05b7df65b16790649cf27705e2eef41cf4af4a [201/201] xen/events: don't unmask an event channel when an eoi is pending config: i386-randconfig-a005-20210314 (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/sashal/linux-stable.git/c... git remote add sashal-linux-stable https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git git fetch --no-tags sashal-linux-stable queue-5.10 git checkout 6f05b7df65b16790649cf27705e2eef41cf4af4a # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): drivers/xen/events/events_base.c: In function 'eoi_pirq': 781 | int masked = test_and_set_mask(evtchn); | ^~~~~~~~~~~~~~~~~ | test_and_set_bit cc1: some warnings being treated as errors vim +781 drivers/xen/events/events_base.c d46a78b05c0e37 drivers/xen/events.c Jeremy Fitzhardinge 2010-10-01 769 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 770 static void eoi_pirq(struct irq_data *data) 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 771 { 0102e4efda76d0 drivers/xen/events/events_base.c Yan Yankovskyi 2020-03-23 772 evtchn_port_t evtchn = evtchn_from_irq(data->irq); 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 773 struct physdev_eoi eoi = { .irq = pirq_from_irq(data->irq) }; 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 774 int rc = 0; 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 775 ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 776 if (!VALID_EVTCHN(evtchn)) ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 777 return; 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 778 f0f393877c71ad drivers/xen/events/events_base.c Ross Lagerwall 2016-05-10 779 if (unlikely(irqd_is_setaffinity_pending(data)) && f0f393877c71ad drivers/xen/events/events_base.c Ross Lagerwall 2016-05-10 780 likely(!irqd_irq_disabled(data))) { ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 @781 int masked = test_and_set_mask(evtchn); ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 782 ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 783 clear_evtchn(evtchn); ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 784 ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 785 irq_move_masked_irq(data); ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 786 ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 787 if (!masked) ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 788 unmask_evtchn(evtchn); ff1e22e7a638a0 drivers/xen/events/events_base.c Boris Ostrovsky 2016-03-18 789 } else 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 790 clear_evtchn(evtchn); 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 791 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 792 if (pirq_needs_eoi(data->irq)) { 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 793 rc = HYPERVISOR_physdev_op(PHYSDEVOP_eoi, &eoi); 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 794 WARN_ON(rc); 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 795 } 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 796 } 7e186bdd0098b3 drivers/xen/events.c Stefano Stabellini 2011-05-06 797 :::::: The code at line 781 was first introduced by commit :::::: ff1e22e7a638a0782f54f81a6c9cb139aca2da35 xen/events: Mask a moving irq :::::: TO: Boris Ostrovsky <boris.ostrovsky(a)oracle.com&gt; :::::: CC: David Vrabel <david.vrabel(a)citrix.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org