Hi "Christian, I love your patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [cannot apply to drm-exynos/exynos-drm-next drm-intel/for-linux-next tegra-drm/drm/tegra/for-next linus/master drm/drm-next v5.9 next-20201023] [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/Christian-K-nig/drm-ttm-nuke-ttm_tt_set_-un-populated-again/20201026-004114 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: arc-randconfig-r024-20201026 (attached as .config) compiler: arc-elf-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 # https://github.com/0day-ci/linux/commit/618def1bc3db379a76b7462ab38236bfeb3df3d3 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Christian-K-nig/drm-ttm-nuke-ttm_tt_set_-un-populated-again/20201026-004114 git checkout 618def1bc3db379a76b7462ab38236bfeb3df3d3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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/ttm/ttm_pool.c:154:5: warning: no previous prototype for 'ttm_pool_apply_caching' [-Wmissing-prototypes] 154 | int ttm_pool_apply_caching(struct page **first, struct page **last, | ^~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/list.h:9, from include/linux/module.h:12, from drivers/gpu/drm/ttm/ttm_pool.c:33: drivers/gpu/drm/ttm/ttm_pool.c: In function 'ttm_pool_alloc': include/linux/kernel.h:850:29: warning: comparison of distinct pointer types lacks a cast 850 | (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) | ^~ include/linux/kernel.h:864:4: note: in expansion of macro '__typecheck' 864 | (__typecheck(x, y) && __no_side_effects(x, y)) | ^~~~~~~~~~~ include/linux/kernel.h:874:24: note: in expansion of macro '__safe_cmp' 874 | __builtin_choose_expr(__safe_cmp(x, y), \ | ^~~~~~~~~~ include/linux/kernel.h:883:19: note: in expansion of macro '__careful_cmp' 883 | #define min(x, y) __careful_cmp(x, y, <) | ^~~~~~~~~~~~~ drivers/gpu/drm/ttm/ttm_pool.c:378:15: note: in expansion of macro 'min' 378 | for (order = min(MAX_ORDER - 1UL, __fls(num_pages)); num_pages; | ^~~ vim +/ttm_pool_apply_caching +154 drivers/gpu/drm/ttm/ttm_pool.c 152 153 /* Apply a new caching to an array of pages */ > 154 int ttm_pool_apply_caching(struct page **first, struct page **last, 155 enum ttm_caching caching) 156 { 157 #ifdef CONFIG_X86 158 unsigned int num_pages = last - first; 159 160 if (!num_pages) 161 return 0; 162 163 switch (caching) { 164 case ttm_cached: 165 break; 166 case ttm_write_combined: 167 return set_pages_array_wc(first, num_pages); 168 break; 169 case ttm_uncached: 170 return set_pages_array_uc(first, num_pages); 171 break; 172 } 173 #endif 174 return 0; 175 } 176 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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