Hi, kernel test robot noticed the following build errors: [auto build test ERROR on 33cc938e65a98f1d29d0a18403dbbee050dcad9a] url: https://github.com/intel-lab-lkp/linux/commits/tanzirh-google-com/lib-string-shrink-lib-string-i-via-IWYU/20231206-050121 base: 33cc938e65a98f1d29d0a18403dbbee050dcad9a patch link: https://lore.kernel.org/r/20231205-libstringheader-v1-1-7f9c573053a7%40gmail.com patch subject: [PATCH] lib/string: shrink lib/string.i via IWYU config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20231206/202312061429.BJ7GrHnt-lkp@xxxxxxxxx/config) compiler: sh4-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231206/202312061429.BJ7GrHnt-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202312061429.BJ7GrHnt-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from lib/string.c:29: lib/string.c: In function 'strscpy': >> arch/sh/include/asm/word-at-a-time.h:15:36: error: implicit declaration of function 'REPEAT_BYTE' [-Werror=implicit-function-declaration] 15 | #define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x01), REPEAT_BYTE(0x80) } | ^~~~~~~~~~~ lib/string.c:124:49: note: in expansion of macro 'WORD_AT_A_TIME_CONSTANTS' 124 | const struct word_at_a_time constants = WORD_AT_A_TIME_CONSTANTS; | ^~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/REPEAT_BYTE +15 arch/sh/include/asm/word-at-a-time.h cba8df4be3bdf1 Paul Mundt 2012-06-04 14 cba8df4be3bdf1 Paul Mundt 2012-06-04 @15 #define WORD_AT_A_TIME_CONSTANTS { REPEAT_BYTE(0x01), REPEAT_BYTE(0x80) } cba8df4be3bdf1 Paul Mundt 2012-06-04 16 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki