Hi Guo, First bad commit (maybe != root cause): tree: https://github.com/c-sky/csky-linux linux-next-riscv-optprobe head: db7e958a1860da6c865994602526cedf0368e4e5 commit: 332f9b6ac7dc75c6eb21e5b01f0b0ba0a9950fe1 [5/8] riscv: Add uprobes supported config: riscv-randconfig-s032-20200731 (attached as .config) compiler: riscv32-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: v0.6.2-115-g5fc204f2-dirty git checkout 332f9b6ac7dc75c6eb21e5b01f0b0ba0a9950fe1 # 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=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) >> arch/riscv/kernel/probes/decode-insn.c:19:31: sparse: sparse: cast to restricted __le32 vim +19 arch/riscv/kernel/probes/decode-insn.c 6c46ab88f7a6c29 Guo Ren 2020-06-30 11 6c46ab88f7a6c29 Guo Ren 2020-06-30 12 /* Return: 6c46ab88f7a6c29 Guo Ren 2020-06-30 13 * INSN_REJECTED If instruction is one not allowed to kprobe, 6c46ab88f7a6c29 Guo Ren 2020-06-30 14 * INSN_GOOD_NO_SLOT If instruction is supported but doesn't use its slot. 6c46ab88f7a6c29 Guo Ren 2020-06-30 15 */ 6c46ab88f7a6c29 Guo Ren 2020-06-30 16 enum probe_insn __kprobes 6c46ab88f7a6c29 Guo Ren 2020-06-30 17 riscv_probe_decode_insn(probe_opcode_t *addr, struct arch_probe_insn *api) 6c46ab88f7a6c29 Guo Ren 2020-06-30 18 { 6c46ab88f7a6c29 Guo Ren 2020-06-30 @19 probe_opcode_t insn = le32_to_cpu(*addr); :::::: The code at line 19 was first introduced by commit :::::: 6c46ab88f7a6c29fa61fa951ee8392fd9e857307 riscv: Add kprobes supported :::::: TO: Guo Ren :::::: CC: Guo Ren --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org