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

From: kernel test robot <lkp@intel.com>
To: "Łukasz Bartosik" <lb@semihalf.com>,
	"Jason Baron" <jbaron@akamai.com>,
	"Jim Cromie" <jim.cromie@gmail.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Kees Cook" <keescook@chromium.org>,
	"Douglas Anderson" <dianders@chromium.org>
Cc: oe-kbuild-all@lists.linux.dev,
	Linux Memory Management List <linux-mm@kvack.org>,
	Guenter Roeck <groeck@google.com>,
	Yaniv Tzoreff <yanivt@google.com>,
	Benson Leung <bleung@google.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Vincent Whitchurch <vincent.whitchurch@axis.com>,
	Pekka Paalanen <ppaalanen@gmail.com>,
	Sean Paul <seanpaul@chromium.org>,
	Daniel Vetter <daniel@ffwll.ch>,
	linux-kernel@vger.kernel.org, upstream@semihalf.com
Subject: Re: [PATCH v1 10/12] dyndbg: add processing of T(race) flag argument
Date: Sat, 4 Nov 2023 02:03:13 +0800	[thread overview]
Message-ID: <202311040120.oiJ1m9Pw-lkp@intel.com> (raw)
In-Reply-To: <20231103131011.1316396-11-lb@semihalf.com>

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@intel.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