Hi Felix,

Thank you for the 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/545d8003c8da8397f0fa9657f97ed67441dd1087
        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 545d8003c8da8397f0fa9657f97ed67441dd1087
        # 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@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:417:6: warning: no previous prototype for 'svm_range_add_child' [-Wmissing-prototypes]
     417 | void svm_range_add_child(struct svm_range *prange, struct mm_struct *mm,
         |      ^~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:511:19: warning: no previous prototype for 'svm_range_clone' [-Wmissing-prototypes]
     511 | struct svm_range *svm_range_clone(struct svm_range *old)
         |                   ^~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:766:1: warning: no previous prototype for 'svm_range_add_list_work' [-Wmissing-prototypes]
     766 | svm_range_add_list_work(struct svm_range_list *svms, struct svm_range *prange,
         | ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c:788:6: warning: no previous prototype for 'schedule_deferred_list_work' [-Wmissing-prototypes]
     788 | void schedule_deferred_list_work(struct svm_range_list *svms)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/svm_range_add_child +417 drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_svm.c

   416	
 > 417	void svm_range_add_child(struct svm_range *prange, struct mm_struct *mm,
   418				 struct svm_range *pchild, enum svm_work_list_ops op)
   419	{
   420		pr_debug("add child 0x%p [0x%lx 0x%lx] to prange 0x%p child list %d\n",
   421			 pchild, pchild->start, pchild->last, prange, op);
   422	
   423		pchild->work_item.mm = mm;
   424		pchild->work_item.op = op;
   425		list_add_tail(&pchild->child_list, &prange->child_list);
   426	}
   427	

---
0-DAY CI Kernel Test Service, Intel Corporation
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