Hi Xia, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 7c60610d476766e128cc4284bb6349732cbd6606 commit: 030a7b5c168d996e590cdd09fffd8ebaa8a5d571 media: platform: Rename jpeg dec file name date: 12 months ago config: mips-randconfig-c004-20210816 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 44d0a99a12ec7ead4d2f5ef649ba05b40f6d463d) 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 # install mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # 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 030a7b5c168d996e590cdd09fffd8ebaa8a5d571 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 >>): #define RST 0xd0 ^ arch/mips/include/asm/mach-rc32434/rb.h:15:9: note: previous definition is here #define RST (1 << 15) ^ 1 warning generated. vim +/RST +15 drivers/media/platform/mtk-jpeg/mtk_jpeg_dec_parse.c b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 12 b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 13 #define TEM 0x01 b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 14 #define SOF0 0xc0 b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 @15 #define RST 0xd0 b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 16 #define SOI 0xd8 b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 17 #define EOI 0xd9 b2f0d2724ba477d drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 18 :::::: The code at line 15 was first introduced by commit :::::: b2f0d2724ba477d326e9d654d4db1c93e98f8b93 [media] vcodec: mediatek: Add Mediatek JPEG Decoder Driver :::::: TO: Rick Chang <rick.chang(a)mediatek.com&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)s-opensource.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org