[kbuild-all] [linux-next:master 3194/4408] arch/riscv/kernel/traps.c:130:17: error: implicit declaration of function 'get_break_insn_length'

Hi Vincent, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 8ada228ac7ed08a2c5ce035089e858b103af09c4 commit: 727a399b7476d1c509c4526594ad514e47a7e069 [3194/4408] riscv: remove the switch statement in do_trap_break() config: riscv-allnoconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 727a399b7476d1c509c4526594ad514e47a7e069 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/riscv/kernel/traps.c: In function 'do_trap_break': regs->sepc += get_break_insn_length(regs->sepc); ^~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/get_break_insn_length +130 arch/riscv/kernel/traps.c ee72e0e70cf7c8 Vincent Chen 2019-03-05 124 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 125 asmlinkage void do_trap_break(struct pt_regs *regs) 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 126 { 727a399b7476d1 Vincent Chen 2019-09-23 127 if (user_mode(regs)) 727a399b7476d1 Vincent Chen 2019-09-23 128 force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->sepc); 727a399b7476d1 Vincent Chen 2019-09-23 129 else if (report_bug(regs->sepc, regs) == BUG_TRAP_TYPE_WARN) ee72e0e70cf7c8 Vincent Chen 2019-03-05 @130 regs->sepc += get_break_insn_length(regs->sepc); 727a399b7476d1 Vincent Chen 2019-09-23 131 else 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 132 die(regs, "Kernel BUG"); 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 133 } 76d2a0493a17d4 Palmer Dabbelt 2017-07-10 134 :::::: The code at line 130 was first introduced by commit :::::: ee72e0e70cf7c846a4e0b6160f771da8f68571dc riscv: Add the support for c.ebreak check in is_valid_bugaddr() :::::: TO: Vincent Chen <vincentc(a)andestech.com&gt; :::::: CC: Palmer Dabbelt <palmer(a)sifive.com&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation