Hi,

[auto build test WARNING on pm/linux-next]
[also build test WARNING on v4.7-rc2 next-20160608]
[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/dbasehore-chromium-org/Add-suspend-to-idle-validation-for-Intel-SoCs/20160609-111421
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-s3-06091046 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> drivers/cpuidle/cpuidle.c:37:12: warning: 'cpuidle_freeze_error' defined but not used [-Wunused-variable]
    static int cpuidle_freeze_error;
               ^~~~~~~~~~~~~~~~~~~~

vim +/cpuidle_freeze_error +37 drivers/cpuidle/cpuidle.c

    21	#include <linux/module.h>
    22	#include <linux/suspend.h>
    23	#include <linux/tick.h>
    24	#include <trace/events/power.h>
    25	
    26	#include "cpuidle.h"
    27	
    28	DEFINE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
    29	DEFINE_PER_CPU(struct cpuidle_device, cpuidle_dev);
    30	
    31	DEFINE_MUTEX(cpuidle_lock);
    32	LIST_HEAD(cpuidle_detected_devices);
    33	
    34	static int enabled_devices;
    35	static int off __read_mostly;
    36	static int initialized __read_mostly;
  > 37	static int cpuidle_freeze_error;
    38	
    39	int cpuidle_disabled(void)
    40	{
    41		return off;
    42	}
    43	void disable_cpuidle(void)
    44	{
    45		off = 1;

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