Hi Michael, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on drm/drm-next] [cannot apply to drm-intel/for-linux-next v5.17-rc5 next-20220222] [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/Michael-Cheng/Use-drm_clflush-instead-of-clflush/20220223-140110 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: h8300-randconfig-r014-20220221 (https://download.01.org/0day-ci/archive/20220223/202202231707.Syvm9oFu-lkp@xxxxxxxxx/config) compiler: h8300-linux-gcc (GCC) 11.2.0 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/f4c92ba1f52db578a26ac9944e2cbe52c548e8e9 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Michael-Cheng/Use-drm_clflush-instead-of-clflush/20220223-140110 git checkout f4c92ba1f52db578a26ac9944e2cbe52c548e8e9 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=h8300 SHELL=/bin/bash drivers/gpu/drm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/drm_cache.c:31: >> include/linux/cacheflush.h:12:46: warning: 'struct folio' declared inside parameter list will not be visible outside of this definition or declaration 12 | static inline void flush_dcache_folio(struct folio *folio) | ^~~~~ vim +12 include/linux/cacheflush.h 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 6) 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 7) #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 8) #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 9) void flush_dcache_folio(struct folio *folio); 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 10) #endif 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 11) #else 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 @12) static inline void flush_dcache_folio(struct folio *folio) 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 13) { 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 14) } 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 15) #define ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO 0 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 16) #endif /* ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE */ 522a0032af00550 Matthew Wilcox (Oracle 2021-11-06 17) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx