linux-kernel - Re: [PATCH v1 10/12] dyndbg: add processing of T(race) flag argument

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Message-ID: <202311040120.oiJ1m9Pw-lkp@intel.com>
Date:   Sat, 4 Nov 2023 02:03:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Łukasz Bartosik <lb@...ihalf.com>,
        Jason Baron <jbaron@...mai.com>,
        Jim Cromie <jim.cromie@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Kees Cook <keescook@...omium.org>,
        Douglas Anderson <dianders@...omium.org>
Cc:     oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        Guenter Roeck <groeck@...gle.com>,
        Yaniv Tzoreff <yanivt@...gle.com>,
        Benson Leung <bleung@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vincent Whitchurch <vincent.whitchurch@...s.com>,
        Pekka Paalanen <ppaalanen@...il.com>,
        Sean Paul <seanpaul@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
        upstream@...ihalf.com
Subject: Re: [PATCH v1 10/12] dyndbg: add processing of T(race) flag argument

Hi Łukasz,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master v6.6 next-20231103]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/ukasz-Bartosik/dyndbg-add-_DPRINTK_FLAGS_ENABLED/20231103-212105
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20231103131011.1316396-11-lb%40semihalf.com
patch subject: [PATCH v1 10/12] dyndbg: add processing of T(race) flag argument
config: loongarch-randconfig-002-20231103 (https://download.01.org/0day-ci/archive/20231104/202311040120.oiJ1m9Pw-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311040120.oiJ1m9Pw-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311040120.oiJ1m9Pw-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> lib/dynamic_debug.c:157:7: warning: no previous prototype for 'show_T_args' [-Wmissing-prototypes]
     157 | char *show_T_args(struct dd_ctrl *ctrl, char *p)
         |       ^~~~~~~~~~~


vim +/show_T_args +157 lib/dynamic_debug.c

   156	
 > 157	char *show_T_args(struct dd_ctrl *ctrl, char *p)
   158	{
   159		int n;
   160	
   161		n = snprintf(p, FLAG_T_ARGS_LEN, ":%u", ctrl->trace_dst);
   162		WARN_ONCE(n < 0, "printing T flag args value failed\n");
   163	
   164		return n < 0 ? p : p + n;
   165	}
   166	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki