tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   27bba9c532a8d21050b94224ffd310ad0058c353
commit: 30df74d67d48949da87e3a5b57c381763e8fd526 powerpc/watchpoint/xmon: 
Support 2nd DAWR
date:   6 months ago
config: powerpc-randconfig-m031-20201121 (attached as .config)
compiler: powerpc-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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=30df74d67d48949da87e3a5b57c381763e8fd526
        git remote add linus 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 30df74d67d48949da87e3a5b57c381763e8fd526
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross 
ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

All errors (new ones prefixed by >>):

>> arch/powerpc/xmon/xmon.c:1379:12: error: 'find_free_data_bpt' defined but 
>> not used [-Werror=unused-function]
    1379 | static int find_free_data_bpt(void)
         |            ^~~~~~~~~~~~~~~~~~
   arch/powerpc/xmon/xmon.c: In function 'xmon_print_symbol':
   arch/powerpc/xmon/xmon.c:3633:14: error: variable 'name' might be clobbered 
by 'longjmp' or 'vfork' [-Werror=clobbered]
    3633 |  const char *name = NULL;
         |              ^~~~
   arch/powerpc/xmon/xmon.c: In function 'show_tasks':
   arch/powerpc/xmon/xmon.c:3310:22: error: variable 'tsk' might be clobbered 
by 'longjmp' or 'vfork' [-Werror=clobbered]
    3310 |  struct task_struct *tsk = NULL;
         |                      ^~~
   arch/powerpc/xmon/xmon.c: In function 'xmon_core.constprop':
   arch/powerpc/xmon/xmon.c:487:6: error: variable 'cmd' might be clobbered by 
'longjmp' or 'vfork' [-Werror=clobbered]
     487 |  int cmd = 0;
         |      ^~~
   cc1: all warnings being treated as errors

vim +/find_free_data_bpt +1379 arch/powerpc/xmon/xmon.c

  1378  
> 1379  static int find_free_data_bpt(void)
  1380  {
  1381          int i;
  1382  
  1383          for (i = 0; i < nr_wp_slots(); i++) {
  1384                  if (!dabr[i].enabled)
  1385                          return i;
  1386          }
  1387          printf("Couldn't find free breakpoint register\n");
  1388          return -1;
  1389  }
  1390  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

Attachment: .config.gz
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