Hi Felix, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20210331] [cannot apply to drm-intel/for-linux-next drm-tip/drm-tip drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master drm/drm-next v5.12-rc5 v5.12-rc4 v5.12-rc3 v5.12-rc5] [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] url: https://github.com/0day-ci/linux/commits/Felix-Kuehling/Add-HMM-based-SVM-memory-manager-to-KFD-v3/20210401-122712 base: 7a43c78d0573e0bbbb0456b033e2b9a895b89464 config: x86_64-randconfig-a011-20210401 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/07dfb6a9dad338dae38a3a840ce14f77e7498b1f git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Felix-Kuehling/Add-HMM-based-SVM-memory-manager-to-KFD-v3/20210401-122712 git checkout 07dfb6a9dad338dae38a3a840ce14f77e7498b1f # save the attached .config to linux build tree make W=1 ARCH=x86_64 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_svm.c:170:6: warning: no previous prototype for 'svm_range_dma_unmap' [-Wmissing-prototypes] 170 | void svm_range_dma_unmap(struct device *dev, dma_addr_t *dma_addr, | ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:603:6: warning: no previous prototype for 'svm_range_add_child' [-Wmissing-prototypes] 603 | void svm_range_add_child(struct svm_range *prange, struct mm_struct *mm, | ^~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:799:5: warning: no previous prototype for 'svm_range_reserve_bos' [-Wmissing-prototypes] 799 | int svm_range_reserve_bos(struct svm_validate_context *ctx) | ^~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:853:6: warning: no previous prototype for 'svm_range_unreserve_bos' [-Wmissing-prototypes] 853 | void svm_range_unreserve_bos(struct svm_validate_context *ctx) | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c: In function 'svm_range_evict': >> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:1071:6: warning: variable 'invalid' set but not used [-Wunused-but-set-variable] 1071 | int invalid, evicted_ranges; | ^~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c: At top level: drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:1094:19: warning: no previous prototype for 'svm_range_clone' [-Wmissing-prototypes] 1094 | struct svm_range *svm_range_clone(struct svm_range *old) | ^~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:1349:1: warning: no previous prototype for 'svm_range_add_list_work' [-Wmissing-prototypes] 1349 | svm_range_add_list_work(struct svm_range_list *svms, struct svm_range *prange, | ^~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:1371:6: warning: no previous prototype for 'schedule_deferred_list_work' [-Wmissing-prototypes] 1371 | void schedule_deferred_list_work(struct svm_range_list *svms) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/invalid +1071 drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c 1054 1055 /** 1056 * svm_range_evict - evict svm range 1057 * 1058 * Stop all queues of the process to ensure GPU doesn't access the memory, then 1059 * return to let CPU evict the buffer and proceed CPU pagetable update. 1060 * 1061 * Don't need use lock to sync cpu pagetable invalidation with GPU execution. 1062 * If invalidation happens while restore work is running, restore work will 1063 * restart to ensure to get the latest CPU pages mapping to GPU, then start 1064 * the queues. 1065 */ 1066 static int 1067 svm_range_evict(struct svm_range *prange, struct mm_struct *mm, 1068 unsigned long start, unsigned long last) 1069 { 1070 struct svm_range_list *svms = prange->svms; > 1071 int invalid, evicted_ranges; 1072 int r = 0; 1073 1074 invalid = atomic_inc_return(&prange->invalid); 1075 evicted_ranges = atomic_inc_return(&svms->evicted_ranges); 1076 if (evicted_ranges != 1) 1077 return r; 1078 1079 pr_debug("evicting svms 0x%p range [0x%lx 0x%lx]\n", 1080 prange->svms, prange->start, prange->last); 1081 1082 /* First eviction, stop the queues */ 1083 r = kgd2kfd_quiesce_mm(mm); 1084 if (r) 1085 pr_debug("failed to quiesce KFD\n"); 1086 1087 pr_debug("schedule to restore svm %p ranges\n", svms); 1088 schedule_delayed_work(&svms->restore_work, 1089 msecs_to_jiffies(AMDGPU_SVM_RANGE_RESTORE_DELAY_MS)); 1090 1091 return r; 1092 } 1093 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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