tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.5 head: e521173455782d018f11f576e1ade8847a4e9e09 commit: 3af2c3b2a10b8d4287918dcbe7d6163468443192 [253/257] perf/core: Fix event cgroup tracking config: i386-tinyconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout 3af2c3b2a10b8d4287918dcbe7d6163468443192 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; Note: the sashal-linux-stable/queue-5.5 HEAD e521173455782d018f11f576e1ade8847a4e9e09 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): kernel/events/core.c: In function 'merge_sched_in': perf_cgroup_event_disable(event, ctx); ^~~ kernel/events/core.c:3465:37: note: each undeclared identifier is reported only once for each function it appears in vim +/ctx +3465 kernel/events/core.c 3445 3446 static int merge_sched_in(struct perf_event *event, void *data) 3447 { 3448 struct sched_in_data *sid = data; 3449 3450 WARN_ON_ONCE(event->ctx != sid->ctx); 3451 3452 if (event->state <= PERF_EVENT_STATE_OFF) 3453 return 0; 3454 3455 if (!event_filter_match(event)) 3456 return 0; 3457 3458 if (group_can_go_on(event, sid->cpuctx, sid->can_add_hw)) { 3459 if (!group_sched_in(event, sid->cpuctx, sid->ctx)) 3460 list_add_tail(&event->active_list, get_event_list(event)); 3461 } 3462 3463 if (event->state == PERF_EVENT_STATE_INACTIVE) { 3464 if (event->attr.pinned) { 3466 perf_event_set_state(event, PERF_EVENT_STATE_ERROR); 3467 } 3468 3469 sid->can_add_hw = 0; 3470 sid->ctx->rotate_necessary = 1; 3471 } 3472 3473 return 0; 3474 } 3475 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org