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/31c45957000fde18a71d7e93c0d6be26bc45a239
        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 31c45957000fde18a71d7e93c0d6be26bc45a239
        # 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_migrate.c:194:1: warning: no previous prototype for 'svm_migrate_copy_done' [-Wmissing-prototypes]
     194 | svm_migrate_copy_done(struct amdgpu_device *adev, struct dma_fence *mfence)
         | ^~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_migrate.c:283:6: warning: no previous prototype for 'svm_migrate_put_sys_page' [-Wmissing-prototypes]
     283 | void svm_migrate_put_sys_page(unsigned long addr)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_migrate.c: In function 'svm_migrate_fini':
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_migrate.c:875:2: error: implicit declaration of function 'memunmap_pages'; did you mean 'memcmp_pages'? [-Werror=implicit-function-declaration]
     875 |  memunmap_pages(&adev->kfd.dev->pgmap);
         |  ^~~~~~~~~~~~~~
         |  memcmp_pages
   cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for DEVICE_PRIVATE
   Depends on ZONE_DEVICE
   Selected by
   - HSA_AMD && HAS_IOMEM && DRM_AMDGPU && (X86_64 || ARM64 || PPC64)


vim +/svm_migrate_put_sys_page +283 drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_migrate.c

   282	
 > 283	void svm_migrate_put_sys_page(unsigned long addr)
   284	{
   285		struct page *page;
   286	
   287		page = pfn_to_page(addr >> PAGE_SHIFT);
   288		unlock_page(page);
   289		put_page(page);
   290	}
   291	

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