[PATCH v2 2/2] cpufreq: powernv: Redesign the presentation of throttle notification

[kbuild test robot]

Hi Shilpasri,

[auto build test WARNING on tip/perf/core]
[also build test WARNING on v4.4-rc7 next-20151231]
[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/Shilpasri-G-Bhat/cpufreq-powernv-tracing-Add-powernv_throttle-tracepoint/20160102-062606
config: powerpc-defconfig (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=powerpc 

All warnings (new ones prefixed by >>):

   drivers/cpufreq/powernv-cpufreq.c: In function 'occ_reset_show':
>> drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);       \
     ^
   drivers/cpufreq/powernv-cpufreq.c:625:1: note: in expansion of macro 'define_throttle_reason_attr'
    define_throttle_reason_attr(occ_reset, OCC_RESET_THROTTLE);
    ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'over_current_show':
>> drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);       \
     ^
   drivers/cpufreq/powernv-cpufreq.c:624:1: note: in expansion of macro 'define_throttle_reason_attr'
    define_throttle_reason_attr(over_current, OVERCURRENT);
    ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'power_supply_failure_show':
>> drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);       \
     ^
   drivers/cpufreq/powernv-cpufreq.c:623:1: note: in expansion of macro 'define_throttle_reason_attr'
    define_throttle_reason_attr(power_supply_failure, POWER_SUPPLY_FAILURE);
    ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'cpu_over_temperature_show':
>> drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);       \
     ^
   drivers/cpufreq/powernv-cpufreq.c:622:1: note: in expansion of macro 'define_throttle_reason_attr'
    define_throttle_reason_attr(cpu_over_temperature, CPU_OVERTEMP);
    ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'power_cap_show':
>> drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);       \
     ^
   drivers/cpufreq/powernv-cpufreq.c:621:1: note: in expansion of macro 'define_throttle_reason_attr'
    define_throttle_reason_attr(power_cap, POWERCAP);
    ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'throttle_reset_show':
>> drivers/cpufreq/powernv-cpufreq.c:609:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);       \
     ^
   drivers/cpufreq/powernv-cpufreq.c:620:1: note: in expansion of macro 'define_throttle_reason_attr'
    define_throttle_reason_attr(throttle_reset, NO_THROTTLE);
    ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'throttle_stat_show':
   drivers/cpufreq/powernv-cpufreq.c:589:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);
     ^
   drivers/cpufreq/powernv-cpufreq.c: In function 'throttle_freq_show':
   drivers/cpufreq/powernv-cpufreq.c:568:2: warning: ignoring return value of 'kstrtoint', declared with attribute warn_unused_result [-Wunused-result]
     kstrtoint(kobj->name + 4, 0, &id);
     ^

vim +/kstrtoint +609 drivers/cpufreq/powernv-cpufreq.c

   593	
   594		count += sprintf(&buf[count], "turbo %d\n", chips[i].throt_turbo);
   595		count += sprintf(&buf[count], "sub-turbo %d\n", chips[i].throt_nominal);
   596	
   597		return count;
   598	}
   599	
   600	static struct kobj_attribute attr_throttle_stat =
   601	__ATTR(throttle_stat, 0444, throttle_stat_show, NULL);
   602	
   603	#define define_throttle_reason_attr(attr_name, val)			   \
   604	static ssize_t attr_name##_show(struct kobject *kobj,			   \
   605					   struct kobj_attribute *attr, char *buf) \
   606	{									   \
   607		int i, id;							   \
   608										   \
 > 609		kstrtoint(kobj->name + 4, 0, &id);				   \
   610		for (i = 0; i < nr_chips; i++)					   \
   611			if (chips[i].id == id)					   \
   612				break;						   \
   613										   \
   614		return sprintf(buf, "%d\n", chips[i].reason[val]);		   \
   615	}									   \
   616										   \
   617	static struct kobj_attribute attr_##attr_name =				   \

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