linux-kernel - arch/powerpc/xmon/xmon.c:1379:12: error: 'find_free_data

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Message-ID: <202011211546.49ayj7T6-lkp@intel.com>
Date:   Sat, 21 Nov 2020 15:45:49 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>,
        Michael Neuling <mikey@...ling.org>
Subject: arch/powerpc/xmon/xmon.c:1379:12: error: 'find_free_data_bpt'
 defined but not used

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 <lkp@...el.com>

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/kbuild-all@lists.01.org

Download attachment ".config.gz" of type "application/gzip" (28884 bytes)