Hi Xia, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d434405aaab7d0ebc516b68a8fc4100922d7f5ef commit: 030a7b5c168d996e590cdd09fffd8ebaa8a5d571 media: platform: Rename jpeg dec file name date: 8 months ago config: mips-randconfig-s032-20210412 (attached as .config) compiler: mipsel-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-280-g2cd6d34e-dirty # 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=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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 >>): 15 | #define RST 0xd0 | In file included from arch/mips/include/asm/mach-rc32434/irq.h:8, from arch/mips/include/asm/irq.h:18, from include/linux/irq.h:23, from include/asm-generic/hardirq.h:13, from arch/mips/include/asm/hardirq.h:16, from include/linux/hardirq.h:10, from include/linux/interrupt.h:11, from drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h:11, from drivers/media/platform/mtk-jpeg/mtk_jpeg_dec_hw.h:13, from drivers/media/platform/mtk-jpeg/mtk_jpeg_dec_parse.h:11, from drivers/media/platform/mtk-jpeg/mtk_jpeg_dec_parse.c:11: arch/mips/include/asm/mach-rc32434/rb.h:15: note: this is the location of the previous definition 15 | #define RST (1 << 15) | Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for PHY_SAMSUNG_UFS Depends on OF && (ARCH_EXYNOS || COMPILE_TEST Selected by - SCSI_UFS_EXYNOS && SCSI_LOWLEVEL && SCSI && SCSI_UFSHCD_PLATFORM && (ARCH_EXYNOS || COMPILE_TEST vim +/RST +15 drivers/media/platform/mtk-jpeg/mtk_jpeg_dec_parse.c b2f0d2724ba477 drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 12 b2f0d2724ba477 drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 13 #define TEM 0x01 b2f0d2724ba477 drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 14 #define SOF0 0xc0 b2f0d2724ba477 drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 @15 #define RST 0xd0 b2f0d2724ba477 drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 16 #define SOI 0xd8 b2f0d2724ba477 drivers/media/platform/mtk-jpeg/mtk_jpeg_parse.c Rick Chang 2016-12-14 17 #define EOI 0xd9 b2f0d2724ba477 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