linux-kernel - Re: [PATCH 3/4] sched: introduce synchronized idle injection

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Date:	Sat, 14 Nov 2015 04:23:10 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Cc:	kbuild-all@...org, Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Len Brown <len.brown@...el.com>,
	Rafael Wysocki <rafael.j.wysocki@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	Paul Turner <pjt@...gle.com>,
	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: Re: [PATCH 3/4] sched: introduce synchronized idle injection

Hi Jacob,

[auto build test WARNING on: tip/sched/core]
[also build test WARNING on: v4.3 next-20151113]

url:    https://github.com/0day-ci/linux/commits/Jacob-Pan/CFS-idle-injection/20151114-035732
config: i386-randconfig-s1-201545 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

>> kernel/sysctl.c:127:12: warning: 'fifty' defined but not used [-Wunused-variable]
    static int fifty = 50;
               ^

vim +/fifty +127 kernel/sysctl.c

   111	#ifndef CONFIG_MMU
   112	extern int sysctl_nr_trim_pages;
   113	#endif
   114	
   115	/* Constants used for minimum and  maximum */
   116	#ifdef CONFIG_LOCKUP_DETECTOR
   117	static int sixty = 60;
   118	#endif
   119	
   120	static int __maybe_unused neg_one = -1;
   121	
   122	static int zero;
   123	static int __maybe_unused one = 1;
   124	static int __maybe_unused two = 2;
   125	static int __maybe_unused four = 4;
   126	static unsigned long one_ul = 1;
 > 127	static int fifty = 50;
   128	static int one_hundred = 100;
   129	#ifdef CONFIG_PRINTK
   130	static int ten_thousand = 10000;
   131	#endif
   132	
   133	/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
   134	static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
   135	

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

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