tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 1fe5501ba1abf2b7e78295df73675423bd6899a0 commit: b13812ddea615b6507beef24f76540c0c1143c5c MIPS: Loongson2ef: Disable Loongson MMI instructions date: 7 months ago config: mips-randconfig-r016-20210421 (attached as .config) compiler: mips64el-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b13812ddea615b6507beef24f76540c0c1143c5c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=mips 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 >>): In file included from arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c:24: arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c: In function 'mfgpt_timer_set_periodic': 29 | #define COMPARE ((MFGPT_TICK_RATE + HZ/2) / HZ) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c:54:7: note: in expansion of macro 'COMPARE' 54 | outw(COMPARE, MFGPT0_CMP2); /* set comparator2 */ | ^~~~~~~ arch/mips/loongson2ef/common/cs5536/cs5536_mfgpt.c: At top level: 195 | int __init init_mfgpt_clocksource(void) | ^~~~~~~~~~~~~~~~~~~~~~ vim +29 arch/mips/include/asm/mach-loongson2ef/cs5536/cs5536_mfgpt.h 71e2f4dd5a65bd Jiaxun Yang 2019-10-20 27 71e2f4dd5a65bd Jiaxun Yang 2019-10-20 28 #define MFGPT_TICK_RATE 14318000 71e2f4dd5a65bd Jiaxun Yang 2019-10-20 @29 #define COMPARE ((MFGPT_TICK_RATE + HZ/2) / HZ) 71e2f4dd5a65bd Jiaxun Yang 2019-10-20 30 :::::: The code at line 29 was first introduced by commit :::::: 71e2f4dd5a65bd8dbca0b77661e75eea471168f8 MIPS: Fork loongson2ef from loongson64 :::::: TO: Jiaxun Yang <jiaxun.yang(a)flygoat.com&gt; :::::: CC: Paul Burton <paulburton(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org