tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4333a9b0b67bb4e8bcd91bdd80da80b0ec151162 commit: 08fef4fa947ba75cbf59d67c6be75223c6471a88 media: atomisp: get rid of memory_access.c date: 9 days ago config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 08fef4fa947ba75cbf59d67c6be75223c6471a88 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): -- In file included from include/linux/uuid.h:12, from include/linux/mod_devicetable.h:13, from include/linux/pci.h:27, from drivers/staging/media/atomisp/pci/atomisp_ioctl.c:21: In function 'strncpy', inlined from 'atomisp_enum_input' at drivers/staging/media/atomisp/pci/atomisp_ioctl.c:575:2: include/linux/string.h:282:9: warning: '__builtin_strncpy' output may be truncated copying 31 bytes from a string of length 31 [-Wstringop-truncation] 282 | return __builtin_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In function 'strncpy', inlined from 'atomisp_enum_input' at drivers/staging/media/atomisp/pci/atomisp_ioctl.c:595:4: include/linux/string.h:282:9: warning: '__builtin_strncpy' output may be truncated copying between 1 and 30 bytes from a string of length 31 [-Wstringop-truncation] 282 | return __builtin_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/staging/media/atomisp/pci/atomisp_v4l2.c:762:12: warning: 'atomisp_mrfld_power' defined but not used [-Wunused-function] 762 | static int atomisp_mrfld_power(struct atomisp_device *isp, bool enable) | ^~~~~~~~~~~~~~~~~~~ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org