On Wed, May 20, 2020 at 10:05 AM Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Tue, 19 May 2020 16:44:22 +0800 kbuild test robot <lkp@xxxxxxxxx> wrote: > > > Hi Andrew, > > > > First bad commit (maybe != root cause): > > > > tree: https://github.com/hnaz/linux-mm master > > head: 2bbf0589bfeb27800c730b76eacf34528eee5418 > > commit: 91cd0b1b65c463042fdeb4ab5ffcb64ae43179cf [380/523] linux-next-rejects > > config: riscv-allyesconfig (attached as .config) > > compiler: riscv64-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 > > git checkout 91cd0b1b65c463042fdeb4ab5ffcb64ae43179cf > > # 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: kbuild test robot <lkp@xxxxxxxxx> > > > > All warnings (new ones prefixed by >>, old ones prefixed by <<): > > > > >> arch/riscv/kernel/kgdb.c:47:5: warning: no previous prototype for 'decode_register_index' [-Wmissing-prototypes] > > 47 | int decode_register_index(unsigned long opcode, int offset) > > | ^~~~~~~~~~~~~~~~~~~~~ > > >> arch/riscv/kernel/kgdb.c:52:5: warning: no previous prototype for 'decode_register_index_short' [-Wmissing-prototypes] > > 52 | int decode_register_index_short(unsigned long opcode, int offset) > > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ > > >> arch/riscv/kernel/kgdb.c:58:5: warning: no previous prototype for 'get_step_address' [-Wmissing-prototypes] > > 58 | int get_step_address(struct pt_regs *regs, unsigned long *next_addr) > > | ^~~~~~~~~~~~~~~~ > > >> arch/riscv/kernel/kgdb.c:139:5: warning: no previous prototype for 'do_single_step' [-Wmissing-prototypes] > > 139 | int do_single_step(struct pt_regs *regs) > > | ^~~~~~~~~~~~~~ > > >> arch/riscv/kernel/kgdb.c:276:6: warning: no previous prototype for 'kgdb_arch_handle_qxfer_pkt' [-Wmissing-prototypes] > > 276 | void kgdb_arch_handle_qxfer_pkt(char *remcom_in_buffer, > > | ^~~~~~~~~~~~~~~~~~~~~~~~~~ > > >> arch/riscv/kernel/kgdb.c:323:5: warning: no previous prototype for 'kgdb_riscv_kgdbbreak' [-Wmissing-prototypes] > > 323 | int kgdb_riscv_kgdbbreak(unsigned long addr) > > | ^~~~~~~~~~~~~~~~~~~~ > > In file included from arch/riscv/include/asm/kgdb.h:109, > > from include/linux/kgdb.h:20, > > from arch/riscv/kernel/kgdb.c:9: > > arch/riscv/include/asm/gdb_xml.h:7:19: warning: 'riscv_gdb_stub_feature' defined but not used [-Wunused-const-variable=] > > 7 | static const char riscv_gdb_stub_feature[64] = > > | ^~~~~~~~~~~~~~~~~~~~~~ > > I doubt if linux-next-rejects caused this error - all that patch does > is fix up a reject between linux-next patches and > https://ozlabs.org/~akpm/mmotm/broken-out/riscv-support-debug_wx.patch > > I'm more suspecting that this error is due Vincent's e4f2aa5808fc9 > ("riscv: Add KGDB support") or 899dc734805df ("riscv: Use the XML > target descriptions to report 3 system registers"). > > I tried to use the following commands to reproduce the above warning messages, but I failed. 1. git clone https://github.com/hnaz/linux-mm 2. wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross 3. chmod +x ~/bin/make.cross 4. cd linux-mm 5. git checkout 91cd0b1b65c463042fdeb4ab5ffcb64ae43179cf 6. make ARCH=riscv allyesconfig 7. COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv Could you help me correct the reproduce steps? Thank you.
