Hi Brendan, I love your patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Brendan-Jackman/bpf-x86-Factor-out-emission-of-ModR-M-for-reg-off/20210113-004228 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: riscv-randconfig-p001-20210112 (attached as .config) compiler: riscv32-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 # https://github.com/0day-ci/linux/commit/29323517f0749d2ec9d023d97443d8d18e2e916b git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Brendan-Jackman/bpf-x86-Factor-out-emission-of-ModR-M-for-reg-off/20210113-004228 git checkout 29323517f0749d2ec9d023d97443d8d18e2e916b # 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@xxxxxxxxx> All errors (new ones prefixed by >>): arch/riscv/net/bpf_jit_comp32.c: In function 'emit_store_r64': >> arch/riscv/net/bpf_jit_comp32.c:884:46: error: 'imm' undeclared (first use in this function) 884 | if (mode == BPF_ATOMIC && (size != BPF_W || imm != BPF_ADD)) | ^~~ arch/riscv/net/bpf_jit_comp32.c:884:46: note: each undeclared identifier is reported only once for each function it appears in vim +/imm +884 arch/riscv/net/bpf_jit_comp32.c 874 875 static int emit_store_r64(const s8 *dst, const s8 *src, s16 off, 876 struct rv_jit_context *ctx, const u8 size, 877 const u8 mode) 878 { 879 const s8 *tmp1 = bpf2rv32[TMP_REG_1]; 880 const s8 *tmp2 = bpf2rv32[TMP_REG_2]; 881 const s8 *rd = bpf_get_reg64(dst, tmp1, ctx); 882 const s8 *rs = bpf_get_reg64(src, tmp2, ctx); 883 > 884 if (mode == BPF_ATOMIC && (size != BPF_W || imm != BPF_ADD)) 885 return -1; 886 887 emit_imm(RV_REG_T0, off, ctx); 888 emit(rv_add(RV_REG_T0, RV_REG_T0, lo(rd)), ctx); 889 890 switch (size) { 891 case BPF_B: 892 emit(rv_sb(RV_REG_T0, 0, lo(rs)), ctx); 893 break; 894 case BPF_H: 895 emit(rv_sh(RV_REG_T0, 0, lo(rs)), ctx); 896 break; 897 case BPF_W: 898 switch (mode) { 899 case BPF_MEM: 900 emit(rv_sw(RV_REG_T0, 0, lo(rs)), ctx); 901 break; 902 case BPF_ATOMIC: /* .imm checked above - only BPF_ADD allowed */ 903 emit(rv_amoadd_w(RV_REG_ZERO, lo(rs), RV_REG_T0, 0, 0), 904 ctx); 905 break; 906 } 907 break; 908 case BPF_DW: 909 emit(rv_sw(RV_REG_T0, 0, lo(rs)), ctx); 910 emit(rv_sw(RV_REG_T0, 4, hi(rs)), ctx); 911 break; 912 } 913 914 return 0; 915 } 916 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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