Hi Marek, I love your patch! Perhaps something to improve: [auto build test WARNING on next-20200618] [also build test WARNING on v5.8-rc1] [cannot apply to linuxtv-media/master staging/staging-testing drm-exynos/exynos-drm-next drm-intel/for-linux-next linus/master v5.8-rc1 v5.7 v5.7-rc7] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Marek-Szyprowski/DRM-fix-struct-sg_table-nents-vs-orig_nents-misuse/20200619-000417 base: ce2cc8efd7a40cbd17841add878cb691d0ce0bba config: alpha-allyesconfig (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/kernel.h:11, from include/linux/delay.h:22, from drivers/gpu/drm/v3d/v3d_drv.h:4, from drivers/gpu/drm/v3d/v3d_mmu.c:21: drivers/gpu/drm/v3d/v3d_mmu.c: In function 'v3d_mmu_insert_ptes': include/linux/compiler.h:339:38: error: call to '__compiletime_assert_254' declared with attribute error: BUILD_BUG_ON failed: V3D_MMU_PAGE_SHIFT != PAGE_SIZE 339 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ include/linux/compiler.h:320:4: note: in definition of macro '__compiletime_assert' 320 | prefix ## suffix(); | ^~~~~~ include/linux/compiler.h:339:2: note: in expansion of macro '_compiletime_assert' 339 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' 50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) | ^~~~~~~~~~~~~~~~ >> drivers/gpu/drm/v3d/v3d_mmu.c:100:3: note: in expansion of macro 'BUILD_BUG_ON' 100 | BUILD_BUG_ON(V3D_MMU_PAGE_SHIFT != PAGE_SIZE); | ^~~~~~~~~~~~ vim +/BUILD_BUG_ON +100 drivers/gpu/drm/v3d/v3d_mmu.c 86 87 void v3d_mmu_insert_ptes(struct v3d_bo *bo) 88 { 89 struct drm_gem_shmem_object *shmem_obj = &bo->base; 90 struct v3d_dev *v3d = to_v3d_dev(shmem_obj->base.dev); 91 u32 page = bo->node.start; 92 u32 page_prot = V3D_PTE_WRITEABLE | V3D_PTE_VALID; 93 struct sg_dma_page_iter dma_iter; 94 95 for_each_sgtable_dma_page(shmem_obj->sgt, &dma_iter, 0) { 96 dma_addr_t dma_addr = sg_page_iter_dma_address(&dma_iter); 97 u32 page_address = dma_addr >> V3D_MMU_PAGE_SHIFT; 98 u32 pte = page_prot | page_address; 99 > 100 BUILD_BUG_ON(V3D_MMU_PAGE_SHIFT != PAGE_SIZE); 101 BUG_ON(page_address + 1 >= BIT(24)); 102 v3d->pt[page++] = pte; 103 } 104 105 WARN_ON_ONCE(page - bo->node.start != 106 shmem_obj->base.size >> V3D_MMU_PAGE_SHIFT); 107 108 if (v3d_mmu_flush_all(v3d)) 109 dev_err(v3d->drm.dev, "MMU flush timeout\n"); 110 } 111 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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