tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: 4bd8020d6c753ab56df4d7bd75833fd880e1995a commit: 45102484256d341921bf68bdbee0a16141afd9a9 [42/120] drm/sched: Use completion to wait for sched->thread idle v2. config: powerpc64-randconfig-r006-20210320 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 436c6c9c20cc522c92a923440a5fc509c342a7db) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # 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-5.4 git checkout 45102484256d341921bf68bdbee0a16141afd9a9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c:29: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:31: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ctx.h:26: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ring.h:28: struct completion entity_idle; ^ include/linux/kernel.h:200:8: note: forward declaration of 'struct completion' struct completion; ^ In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c:40: In file included from include/linux/pci.h:1794: In file included from arch/powerpc/include/asm/pci.h:12: include/linux/dma-mapping.h:742:9: warning: implicit conversion from 'unsigned long long' to 'unsigned long' changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion] return DMA_BIT_MASK(32); ~~~~~~ ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:142:40: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^~~~~ 1 warning and 1 error generated. -- In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c:28: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:31: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ctx.h:26: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ring.h:28: struct completion entity_idle; ^ include/linux/kernel.h:200:8: note: forward declaration of 'struct completion' struct completion; ^ 1 error generated. -- In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:34: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:31: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ctx.h:26: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ring.h:28: struct completion entity_idle; ^ include/linux/kernel.h:200:8: note: forward declaration of 'struct completion' struct completion; ^ In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:38: In file included from include/linux/dma-buf.h:20: include/linux/dma-mapping.h:742:9: warning: implicit conversion from 'unsigned long long' to 'unsigned long' changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion] return DMA_BIT_MASK(32); ~~~~~~ ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:142:40: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:49:18: warning: no previous prototype for function 'amdgpu_gem_prime_get_sg_table' [-Wmissing-prototypes] struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:49:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct sg_table *amdgpu_gem_prime_get_sg_table(struct drm_gem_object *obj) ^ static drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:66:7: warning: no previous prototype for function 'amdgpu_gem_prime_vmap' [-Wmissing-prototypes] void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:66:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void *amdgpu_gem_prime_vmap(struct drm_gem_object *obj) ^ static drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:86:6: warning: no previous prototype for function 'amdgpu_gem_prime_vunmap' [-Wmissing-prototypes] void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:86:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr) ^ static drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:104:5: warning: no previous prototype for function 'amdgpu_gem_prime_mmap' [-Wmissing-prototypes] int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:104:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, ^ static drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:333:17: warning: no previous prototype for function 'amdgpu_gem_prime_export' [-Wmissing-prototypes] struct dma_buf *amdgpu_gem_prime_export(struct drm_gem_object *gobj, ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:333:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct dma_buf *amdgpu_gem_prime_export(struct drm_gem_object *gobj, ^ static drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:366:1: warning: no previous prototype for function 'amdgpu_gem_prime_import_sg_table' [-Wmissing-prototypes] amdgpu_gem_prime_import_sg_table(struct drm_device *dev, ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:365:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct drm_gem_object * ^ static drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:414:24: warning: no previous prototype for function 'amdgpu_gem_prime_import' [-Wmissing-prototypes] struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, ^ drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c:414:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct drm_gem_object *amdgpu_gem_prime_import(struct drm_device *dev, ^ static 8 warnings and 1 error generated. -- In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c:25: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:31: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ctx.h:26: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ring.h:28: struct completion entity_idle; ^ include/linux/kernel.h:200:8: note: forward declaration of 'struct completion' struct completion; ^ drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c:38:7: warning: no previous prototype for function 'amdgpu_xgmi_hive_try_lock' [-Wmissing-prototypes] void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive) ^ drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c:38:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void *amdgpu_xgmi_hive_try_lock(struct amdgpu_hive_info *hive) ^ static 1 warning and 1 error generated. -- In file included from drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c:23: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:31: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ctx.h:26: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_ring.h:28: struct completion entity_idle; ^ include/linux/kernel.h:200:8: note: forward declaration of 'struct completion' struct completion; ^ drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c:56:6: warning: no previous prototype for function 'mmhub_v9_4_setup_vm_pt_regs' [-Wmissing-prototypes] void mmhub_v9_4_setup_vm_pt_regs(struct amdgpu_device *adev, int hubid, ^ drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c:56:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mmhub_v9_4_setup_vm_pt_regs(struct amdgpu_device *adev, int hubid, ^ static 1 warning and 1 error generated. vim +98 include/drm/gpu_scheduler.h 46 47 /** 48 * struct drm_sched_entity - A wrapper around a job queue (typically 49 * attached to the DRM file_priv). 50 * 51 * @list: used to append this struct to the list of entities in the 52 * runqueue. 53 * @rq: runqueue on which this entity is currently scheduled. 54 * @rq_list: a list of run queues on which jobs from this entity can 55 * be scheduled 56 * @num_rq_list: number of run queues in the rq_list 57 * @rq_lock: lock to modify the runqueue to which this entity belongs. 58 * @job_queue: the list of jobs of this entity. 59 * @fence_seq: a linearly increasing seqno incremented with each 60 * new &drm_sched_fence which is part of the entity. 61 * @fence_context: a unique context for all the fences which belong 62 * to this entity. 63 * The &drm_sched_fence.scheduled uses the 64 * fence_context but &drm_sched_fence.finished uses 65 * fence_context + 1. 66 * @dependency: the dependency fence of the job which is on the top 67 * of the job queue. 68 * @cb: callback for the dependency fence above. 69 * @guilty: points to ctx's guilty. 70 * @fini_status: contains the exit status in case the process was signalled. 71 * @last_scheduled: points to the finished fence of the last scheduled job. 72 * @last_user: last group leader pushing a job into the entity. 73 * @stopped: Marks the enity as removed from rq and destined for termination. 74 * @entity_idle: Signals when enityt is not in use 75 * 76 * Entities will emit jobs in order to their corresponding hardware 77 * ring, and the scheduler will alternate between entities based on 78 * scheduling policy. 79 */ 80 struct drm_sched_entity { 81 struct list_head list; 82 struct drm_sched_rq *rq; 83 struct drm_sched_rq **rq_list; 84 unsigned int num_rq_list; 85 spinlock_t rq_lock; 86 87 struct spsc_queue job_queue; 88 89 atomic_t fence_seq; 90 uint64_t fence_context; 91 92 struct dma_fence *dependency; 93 struct dma_fence_cb cb; 94 atomic_t *guilty; 95 struct dma_fence *last_scheduled; 96 struct task_struct *last_user; 97 bool stopped; 99 }; 100 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org