Hi Matteo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linux/master] [also build test WARNING on hch-configfs/for-next linus/master v5.13-rc7 next-20210624] [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/Matteo-Croce/lib-string-optimized-mem-functions/20210625-090352 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 0c18f29aae7ce3dadd26d8ee3505d07cc982df75 config: powerpc64-randconfig-p001-20210622 (attached as .config) compiler: powerpc64-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 # https://github.com/0day-ci/linux/commit/e9af69e22b4b9fe629d72f5c8b022aca3244cc01 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Matteo-Croce/lib-string-optimized-mem-functions/20210625-090352 git checkout e9af69e22b4b9fe629d72f5c8b022aca3244cc01 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): lib/string.c:901: warning: Function parameter or member 'h' not described in 'MERGE_UL' lib/string.c:901: warning: Function parameter or member 'l' not described in 'MERGE_UL' lib/string.c:901: warning: Function parameter or member 'd' not described in 'MERGE_UL' >> lib/string.c:901: warning: expecting prototype for memcpy(). Prototype was for MERGE_UL() instead vim +901 lib/string.c 888 889 #ifndef __HAVE_ARCH_MEMCPY 890 /** 891 * memcpy - Copy one area of memory to another 892 * @dest: Where to copy to 893 * @src: Where to copy from 894 * @count: The size of the area. 895 * 896 * You should not use this function to access IO space, use memcpy_toio() 897 * or memcpy_fromio() instead. 898 */ 899 900 #ifdef __BIG_ENDIAN > 901 #define MERGE_UL(h, l, d) ((h) << ((d) * 8) | (l) >> ((bytes_long - (d)) * 8)) 902 #else 903 #define MERGE_UL(h, l, d) ((h) >> ((d) * 8) | (l) << ((bytes_long - (d)) * 8)) 904 #endif 905 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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