Re: [i915-ci-only NO-REVIEW 24/25] PREEMPT_RT injection

[kernel test robot <lkp@intel.com>]

Hi Maarten,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-i915/for-linux-next]
[also build test ERROR on next-20260225]
[cannot apply to drm-i915/for-linux-next-fixes drm-misc/drm-misc-next drm-xe/drm-xe-next linus/master v7.0-rc1]
[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-vblank_work-Add-methods-to-schedule-vblank_work-in-2-stages/20260226-012447
base:   https://gitlab.freedesktop.org/drm/i915/kernel.git for-linux-next
patch link:    https://lore.kernel.org/r/20260225131931.60724-25-dev%40lankhorst.se
patch subject: [i915-ci-only NO-REVIEW 24/25] PREEMPT_RT injection
config: arm64-randconfig-r123-20260226 (https://download.01.org/0day-ci/archive/20260226/202602261547.3bM6yVAS-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9a109fbb6e184ec9bcce10615949f598f4c974a9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260226/202602261547.3bM6yVAS-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/202602261547.3bM6yVAS-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/ttm/tests/ttm_bo_test.c:225:13: error: incompatible pointer types passing 'struct rt_mutex *' to parameter of type 'struct mutex *' [-Wincompatible-pointer-types]
     225 |         mutex_lock(&bo->base.resv->lock.base);
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/mutex.h:193:44: note: expanded from macro 'mutex_lock'
     193 | #define mutex_lock(lock) mutex_lock_nested(lock, 0)
         |                                            ^~~~
   include/linux/mutex.h:185:45: note: passing argument to parameter 'lock' here
     185 | extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass) __acquires(lock);
         |                                             ^
   drivers/gpu/drm/ttm/tests/ttm_bo_test.c:231:15: error: incompatible pointer types passing 'struct rt_mutex *' to parameter of type 'struct mutex *' [-Wincompatible-pointer-types]
     231 |         mutex_unlock(&bo->base.resv->lock.base);
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/mutex.h:249:40: note: passing argument to parameter 'lock' here
     249 | extern void mutex_unlock(struct mutex *lock) __releases(lock);
         |                                        ^
   2 errors generated.


vim +225 drivers/gpu/drm/ttm/tests/ttm_bo_test.c

995279d280d1ef Karolina Stolarek 2023-11-29  210  
995279d280d1ef Karolina Stolarek 2023-11-29  211  static void ttm_bo_reserve_interrupted(struct kunit *test)
995279d280d1ef Karolina Stolarek 2023-11-29  212  {
995279d280d1ef Karolina Stolarek 2023-11-29  213  	struct ttm_buffer_object *bo;
995279d280d1ef Karolina Stolarek 2023-11-29  214  	struct task_struct *task;
995279d280d1ef Karolina Stolarek 2023-11-29  215  	int err;
995279d280d1ef Karolina Stolarek 2023-11-29  216  
588c4c8d58c413 Karolina Stolarek 2024-06-12  217  	bo = ttm_bo_kunit_init(test, test->priv, BO_SIZE, NULL);
995279d280d1ef Karolina Stolarek 2023-11-29  218  
995279d280d1ef Karolina Stolarek 2023-11-29  219  	task = kthread_create(threaded_ttm_bo_reserve, bo, "ttm-bo-reserve");
995279d280d1ef Karolina Stolarek 2023-11-29  220  
995279d280d1ef Karolina Stolarek 2023-11-29  221  	if (IS_ERR(task))
995279d280d1ef Karolina Stolarek 2023-11-29  222  		KUNIT_FAIL(test, "Couldn't create ttm bo reserve task\n");
995279d280d1ef Karolina Stolarek 2023-11-29  223  
995279d280d1ef Karolina Stolarek 2023-11-29  224  	/* Take a lock so the threaded reserve has to wait */
995279d280d1ef Karolina Stolarek 2023-11-29 @225  	mutex_lock(&bo->base.resv->lock.base);
995279d280d1ef Karolina Stolarek 2023-11-29  226  
995279d280d1ef Karolina Stolarek 2023-11-29  227  	wake_up_process(task);
995279d280d1ef Karolina Stolarek 2023-11-29  228  	msleep(20);
995279d280d1ef Karolina Stolarek 2023-11-29  229  	err = kthread_stop(task);
995279d280d1ef Karolina Stolarek 2023-11-29  230  
995279d280d1ef Karolina Stolarek 2023-11-29  231  	mutex_unlock(&bo->base.resv->lock.base);
995279d280d1ef Karolina Stolarek 2023-11-29  232  
995279d280d1ef Karolina Stolarek 2023-11-29  233  	KUNIT_ASSERT_EQ(test, err, -ERESTARTSYS);
995279d280d1ef Karolina Stolarek 2023-11-29  234  }
995279d280d1ef Karolina Stolarek 2023-11-29  235  #endif /* IS_BUILTIN(CONFIG_DRM_TTM_KUNIT_TEST) */
995279d280d1ef Karolina Stolarek 2023-11-29  236  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki