tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: cb153b68ff91cbc434f3de70ac549e110543e1bb commit: c8b0507f40deea3d5014b5b4989b6a06ffedde70 [10184/11353] drm/amdkfd: judge get_atc_vmid_pasid_mapping_info before call config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220309/202203090313.LRIlHhjL-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=c8b0507f40deea3d5014b5b4989b6a06ffedde70 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout c8b0507f40deea3d5014b5b4989b6a06ffedde70 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/gpu/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device_queue_manager.c:508:6: warning: variable 'vmid' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] if (dev->kfd2kgd->get_atc_vmid_pasid_mapping_info) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device_queue_manager.c:521:6: note: uninitialized use occurs here if (vmid > last_vmid_to_scan) { ^~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device_queue_manager.c:508:2: note: remove the 'if' if its condition is always true if (dev->kfd2kgd->get_atc_vmid_pasid_mapping_info) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device_queue_manager.c:490:19: note: initialize the variable 'vmid' to silence this warning unsigned int vmid; ^ = 0 1 warning generated. vim +508 drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device_queue_manager.c 486 487 static int dbgdev_wave_reset_wavefronts(struct kfd_dev *dev, struct kfd_process *p) 488 { 489 int status = 0; 490 unsigned int vmid; 491 uint16_t queried_pasid; 492 union SQ_CMD_BITS reg_sq_cmd; 493 union GRBM_GFX_INDEX_BITS reg_gfx_index; 494 struct kfd_process_device *pdd; 495 int first_vmid_to_scan = dev->vm_info.first_vmid_kfd; 496 int last_vmid_to_scan = dev->vm_info.last_vmid_kfd; 497 498 reg_sq_cmd.u32All = 0; 499 reg_gfx_index.u32All = 0; 500 501 pr_debug("Killing all process wavefronts\n"); 502 503 /* Scan all registers in the range ATC_VMID8_PASID_MAPPING .. 504 * ATC_VMID15_PASID_MAPPING 505 * to check which VMID the current process is mapped to. 506 */ 507 > 508 if (dev->kfd2kgd->get_atc_vmid_pasid_mapping_info) { 509 for (vmid = first_vmid_to_scan; vmid <= last_vmid_to_scan; vmid++) { 510 status = dev->kfd2kgd->get_atc_vmid_pasid_mapping_info 511 (dev->adev, vmid, &queried_pasid); 512 513 if (status && queried_pasid == p->pasid) { 514 pr_debug("Killing wave fronts of vmid %d and pasid 0x%x\n", 515 vmid, p->pasid); 516 break; 517 } 518 } 519 } 520 521 if (vmid > last_vmid_to_scan) { 522 pr_err("Didn't find vmid for pasid 0x%x\n", p->pasid); 523 return -EFAULT; 524 } 525 526 /* taking the VMID for that process on the safe way using PDD */ 527 pdd = kfd_get_process_device_data(dev, p); 528 if (!pdd) 529 return -EFAULT; 530 531 reg_gfx_index.bits.sh_broadcast_writes = 1; 532 reg_gfx_index.bits.se_broadcast_writes = 1; 533 reg_gfx_index.bits.instance_broadcast_writes = 1; 534 reg_sq_cmd.bits.mode = SQ_IND_CMD_MODE_BROADCAST; 535 reg_sq_cmd.bits.cmd = SQ_IND_CMD_CMD_KILL; 536 reg_sq_cmd.bits.vm_id = vmid; 537 538 dev->kfd2kgd->wave_control_execute(dev->adev, 539 reg_gfx_index.u32All, 540 reg_sq_cmd.u32All); 541 542 return 0; 543 } 544 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
