tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: e47eb90a0a9ae20b82635b9b99a8d0979b757ad8 commit: 40baf1f238b4ff9a8f9556bfae9edef7cf41e34f [4372/4736] zsmalloc: zs_object_copy: replace email link to doc reproduce: # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=40baf1f238b4ff9a8f9556bfae9edef7cf41e34f git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 40baf1f238b4ff9a8f9556bfae9edef7cf41e34f make menuconfig # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS make htmldocs If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> Warning: mm/zsmalloc.c references a file that doesn't exist: Documentation/mm/highmem -- 0-DAY CI Kernel Test Service https://01.org/lkp