tree: git://linuxtv.org/hverkuil/media_tree.git for-v5.9g head: b89aa206069e38a992a4c995322116dbfe6c2116 commit: 935ac8622c84a06b5f53e8ddeb2b1c605062c7ec [19/23] media: allegro: add config blob for channel config: xtensa-allyesconfig (attached as .config) compiler: xtensa-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 git checkout 935ac8622c84a06b5f53e8ddeb2b1c605062c7ec # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/staging/media/allegro-dvt/allegro-mail.c: In function 'allegro_enc_create_channel': 165 | memcpy(&dst[i], msg->blob, msg->blob_size); | ^~~~~~ drivers/staging/media/allegro-dvt/allegro-mail.c:15:1: note: 'memcpy' is defined in header '<string.h>'; did you forget to '#include <string.h>'? 14 | #include "allegro-mail.h" +++ |+#include <string.h> 15 | cc1: some warnings being treated as errors vim +/memcpy +165 drivers/staging/media/allegro-dvt/allegro-mail.c 157 158 static ssize_t 159 allegro_enc_create_channel(u32 *dst, struct mcu_msg_create_channel *msg) 160 { 161 unsigned int i = 0; 162 163 dst[i++] = msg->user_id; 164 166 i += msg->blob_size / sizeof(*dst); 167 168 return i * sizeof(*dst); 169 } 170 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org