Hi Maarten, kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-i915/for-linux-next] [also build test WARNING on drm-i915/for-linux-next-fixes drm-tip/drm-tip drm/drm-next drm-misc/drm-misc-next daeinki-drm-exynos/exynos-drm-next linus/master v7.2-rc5 next-20260731] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Maarten-Lankhorst/drm-i915-Disable-busy-pmu-event-on-CONFIG_PREEMPT_RT/20260731-223850 base: https://gitlab.freedesktop.org/drm/i915/kernel.git for-linux-next patch link: https://lore.kernel.org/r/20260623132734.227322-1-dev%40lankhorst.se patch subject: [PATCH v9.6] drm/i915: Disable "busy" pmu event on CONFIG_PREEMPT_RT config: i386-randconfig-141-20260801 (https://download.01.org/0day-ci/archive/20260801/[email protected]/config) compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project e9846648fd6183ee6d8cbdb4502213fcf902a211) smatch: v0.5.0-9187-g5189e3fb reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260801/[email protected]/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/i915/i915_pmu.c:560:2: warning: unannotated fall-through >> between switch labels [-Wimplicit-fallthrough] 560 | case I915_SAMPLE_WAIT: | ^ drivers/gpu/drm/i915/i915_pmu.c:560:2: note: insert 'break;' to avoid fall-through 560 | case I915_SAMPLE_WAIT: | ^ | break; 1 warning generated. vim +560 drivers/gpu/drm/i915/i915_pmu.c b46a33e271ed81b Tvrtko Ursulin 2017-11-21 550 109ec558370f781 Tvrtko Ursulin 2018-01-11 551 static int 109ec558370f781 Tvrtko Ursulin 2018-01-11 552 engine_event_status(struct intel_engine_cs *engine, 109ec558370f781 Tvrtko Ursulin 2018-01-11 553 enum drm_i915_pmu_engine_sample sample) b46a33e271ed81b Tvrtko Ursulin 2017-11-21 554 { 109ec558370f781 Tvrtko Ursulin 2018-01-11 555 switch (sample) { b46a33e271ed81b Tvrtko Ursulin 2017-11-21 556 case I915_SAMPLE_BUSY: ae7243df39c4099 Maarten Lankhorst 2026-06-23 557 /* The guc submission engine->busyness() callback has issues with CONFIG_PREEMPT_RT */ ae7243df39c4099 Maarten Lankhorst 2026-06-23 558 if (IS_ENABLED(CONFIG_PREEMPT_RT) && intel_uc_uses_guc_submission(&engine->gt->uc)) ae7243df39c4099 Maarten Lankhorst 2026-06-23 559 return -ENODEV; b46a33e271ed81b Tvrtko Ursulin 2017-11-21 @560 case I915_SAMPLE_WAIT: b46a33e271ed81b Tvrtko Ursulin 2017-11-21 561 break; b46a33e271ed81b Tvrtko Ursulin 2017-11-21 562 case I915_SAMPLE_SEMA: 651e7d48577ae28 Lucas De Marchi 2021-06-05 563 if (GRAPHICS_VER(engine->i915) < 6) 109ec558370f781 Tvrtko Ursulin 2018-01-11 564 return -ENODEV; 109ec558370f781 Tvrtko Ursulin 2018-01-11 565 break; 109ec558370f781 Tvrtko Ursulin 2018-01-11 566 default: 109ec558370f781 Tvrtko Ursulin 2018-01-11 567 return -ENOENT; 109ec558370f781 Tvrtko Ursulin 2018-01-11 568 } 109ec558370f781 Tvrtko Ursulin 2018-01-11 569 109ec558370f781 Tvrtko Ursulin 2018-01-11 570 return 0; 109ec558370f781 Tvrtko Ursulin 2018-01-11 571 } 109ec558370f781 Tvrtko Ursulin 2018-01-11 572 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
