linux-kernel - Re: [PATCH v2] Add hard/soft lockup debugger entry points

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Message-ID: <201601270140.LJ0KF0Bm%fengguang.wu@intel.com>
Date:	Wed, 27 Jan 2016 01:45:52 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Jeff Merkey <linux.mdb@...il.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Don Zickus <dzickus@...hat.com>,
	Ulrich Obergfell <uobergfe@...hat.com>,
	Aaron Tomlin <atomlin@...hat.com>,
	Michal Hocko <mhocko@...e.cz>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Tejun Heo <tj@...nel.org>,
	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
	Chris Metcalf <cmetcalf@...hip.com>
Subject: Re: [PATCH v2] Add hard/soft lockup debugger entry points

Hi Jeff,

[auto build test ERROR on v4.5-rc1]
[also build test ERROR on next-20160125]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Jeff-Merkey/Add-hard-soft-lockup-debugger-entry-points/20160127-010930
config: xtensa-allyesconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=xtensa 

All errors (new ones prefixed by >>):

   kernel/watchdog.c: In function 'watchdog_timer_fn':
>> kernel/watchdog.c:489:4: error: implicit declaration of function 'arch_kgdb_breakpoint' [-Werror=implicit-function-declaration]
       arch_kgdb_breakpoint();
       ^
   cc1: some warnings being treated as errors

vim +/arch_kgdb_breakpoint +489 kernel/watchdog.c

   483			if (regs)
   484				show_regs(regs);
   485			else
   486				dump_stack();
   487	
   488			if (debug_watchdog_lockups)
 > 489				arch_kgdb_breakpoint();
   490	
   491			if (softlockup_all_cpu_backtrace) {
   492				/* Avoid generating two back traces for current

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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