Hi Huang, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.16-rc1 next-20211118] [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/Huang-Pei/MIPS-rework-local_t-op... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 42eb8fdac2fc5d62392dcfcf0253753e821a97b0 config: mips-buildonly-randconfig-r003-20211118 (attached as .config) compiler: mips64-linux-gcc (GCC) 11.2.0 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/e556d474e72525ee2464e97dd372f526a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Huang-Pei/MIPS-rework-local_t-operation-on-MIPS64/20211118-173509 git checkout e556d474e72525ee2464e97dd372f526ae18cb40 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash drivers/net/ 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 drivers/net/slip/slip.c:88: 44 | #define END 0300 /* indicates end of frame */ | In file included from arch/mips/include/asm/local.h:10, from include/asm-generic/local64.h:22, from ./arch/mips/include/generated/asm/local64.h:1, from include/linux/u64_stats_sync.h:75, from include/net/snmp.h:47, from include/net/netns/mib.h:5, from include/net/net_namespace.h:17, from include/linux/netdevice.h:37, from drivers/net/slip/slip.c:78: arch/mips/include/asm/asm.h:69: note: this is the location of the previous definition 69 | #define END(function) \ | vim +/END +44 drivers/net/slip/slip.h ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 42 ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 43 /* SLIP protocol characters. */ ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 @44 #define END 0300 /* indicates end of frame */ ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 45 #define ESC 0333 /* indicates byte stuffing */ ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 46 #define ESC_END 0334 /* ESC ESC_END means END 'data' */ ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 47 #define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */ ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 48 ^1da177e4c3f41 drivers/net/slip.h Linus Torvalds 2005-04-16 49 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org