Hi Greentime, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on linus/master] [also build test ERROR on v5.9-rc4 next-20200910] [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/Greentime-Hu/riscv-Add-vector-IS... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7fe10096c1508c7f033d34d0741809f8eecc1ed4 config: riscv-allmodconfig (attached as .config) compiler: riscv64-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): arch/riscv/kernel/process.c:42:6: warning: no previous prototype for 'show_regs' [-Wmissing-prototypes] 42 | void show_regs(struct pt_regs *regs) | ^~~~~~~~~ arch/riscv/kernel/process.c:118:5: warning: no previous prototype for 'arch_dup_task_struct' [-Wmissing-prototypes] 118 | int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src) | ^~~~~~~~~~~~~~~~~~~~ 143 | void arch_release_task_struct(struct task_struct *tsk) | ^~~~~~~~~~~~~~~~~~~~~~~~ -- arch/riscv/kernel/vector.S: Assembler messages: arch/riscv/kernel/vector.S:42: Error: unrecognized opcode `vsetvli t4,t5,e8,m8' arch/riscv/kernel/vector.S:65: Error: unrecognized opcode `vsetvli t4,t5,e8,m8' # https://github.com/0day-ci/linux/commit/606b544e14a96142b4f5ede48937fc564... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Greentime-Hu/riscv-Add-vector-ISA-support/20200910-163426 git checkout 606b544e14a96142b4f5ede48937fc5643b12725 vim +43 arch/riscv/kernel/vector.S 32 33 ENTRY(__vstate_save) 34 li status, SR_VS 35 csrs sstatus, status 36 37 csrr x_vstart, CSR_VSTART 38 csrr x_vtype, CSR_VTYPE 39 csrr x_vl, CSR_VL 40 csrr x_vcsr, CSR_VCSR 41 li m_one, -1 42 vsetvli incr, m_one, e8, m8 44 add datap, datap, incr 46 add datap, datap, incr 48 add datap, datap, incr 50 51 REG_S x_vstart, RISCV_V_STATE_VSTART(vstatep) 52 REG_S x_vtype, RISCV_V_STATE_VTYPE(vstatep) 53 REG_S x_vl, RISCV_V_STATE_VL(vstatep) 54 REG_S x_vcsr, RISCV_V_STATE_VCSR(vstatep) 55 56 csrc sstatus, status 57 ret 58 ENDPROC(__vstate_save) 59 60 ENTRY(__vstate_restore) 61 li status, SR_VS 62 csrs sstatus, status 63 64 li m_one, -1 65 vsetvli incr, m_one, e8, m8 67 add datap, datap, incr 69 add datap, datap, incr 71 add datap, datap, incr 73 74 REG_L x_vstart, RISCV_V_STATE_VSTART(vstatep) 75 REG_L x_vtype, RISCV_V_STATE_VTYPE(vstatep) 76 REG_L x_vl, RISCV_V_STATE_VL(vstatep) 77 REG_L x_vcsr, RISCV_V_STATE_VCSR(vstatep) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org