On 5/20/20 5:00 PM, Vincent Chen wrote:
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?
Hi Vincent,
Sorry for the inconvenience, it's a W=1 build, please download the new
make.cross
and it could be reproduce.
Best Regards,
Rong Chen
