linux-kernel - Re: [PATCH] sched/pelt: fix false running accounting in PELT

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Message-ID: <201707020029.6sB6WXhv%fengguang.wu@intel.com>
Date:   Sun, 2 Jul 2017 00:57:59 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     kbuild-all@...org, peterz@...radead.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org, dietmar.eggemann@....com,
        Morten.Rasmussen@....com,
        Vincent Guittot <vincent.guittot@...aro.org>
Subject: Re: [PATCH] sched/pelt: fix false running accounting in PELT

Hi Vincent,

[auto build test ERROR on tip/sched/core]
[also build test ERROR on v4.12-rc7 next-20170630]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Vincent-Guittot/sched-pelt-fix-false-running-accounting-in-PELT/20170702-002907
config: i386-randconfig-x078-07012120 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel/sched/fair.c: In function '___update_load_avg':
>> kernel/sched/fair.c:2986:10: error: implicit declaration of function 'scale_time' [-Werror=implicit-function-declaration]
     delta = scale_time(delta, cpu, sa, weight, running);
             ^~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/scale_time +2986 kernel/sched/fair.c

  2980			running = 1;
  2981	
  2982		/*
  2983		 * Scale time to reflect the amount a computation effectively done
  2984		 * during the time slot at current capacity
  2985		 */
> 2986		delta = scale_time(delta, cpu, sa, weight, running);
  2987	
  2988		/*
  2989		 * Now we know we crossed measurement unit boundaries. The *_avg

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