* Re: [PATCH v9.6] drm/i915: Disable "busy" pmu event on CONFIG_PREEMPT_RT
[not found] <20260623132734.227322-1-dev@lankhorst.se>
@ 2026-08-01 1:01 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-08-01 1:01 UTC (permalink / raw)
To: Maarten Lankhorst, intel-gfx, intel-xe
Cc: oe-kbuild-all, dri-devel, Maarten Lankhorst
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/20260801/202608010845.CPpXaIeD-lkp@intel.com/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/20260801/202608010845.CPpXaIeD-lkp@intel.com/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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608010845.CPpXaIeD-lkp@intel.com/
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
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