linux-kernel - Re: [PATCH] perf: Add support for creating offline events

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Date:   Tue, 13 Feb 2018 03:11:22 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Raghavendra Rao Ananta <rananta@...eaurora.org>
Cc:     kbuild-all@...org, peterz@...radead.org, mingo@...hat.com,
        acme@...nel.org, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, psodagud@...eaurora.org,
        tsoni@...eaurora.org, rananta@...eaurora.org
Subject: Re: [PATCH] perf: Add support for creating offline events

Hi Raghavendra,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.15]
[also build test ERROR on next-20180212]
[cannot apply to tip/perf/core]
[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/Raghavendra-Rao-Ananta/perf-Add-support-for-creating-offline-events/20180213-023250
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   kernel//events/core.c: In function 'perf_event_init_cpu':
>> kernel//events/core.c:11152:2: error: implicit declaration of function 'perf_deferred_install_in_context'; did you mean 'perf_install_in_context'? [-Werror=implicit-function-declaration]
     perf_deferred_install_in_context(cpu);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     perf_install_in_context
   cc1: some warnings being treated as errors

vim +11152 kernel//events/core.c

 11131	
 11132	int perf_event_init_cpu(unsigned int cpu)
 11133	{
 11134		struct perf_cpu_context *cpuctx;
 11135		struct perf_event_context *ctx;
 11136		struct pmu *pmu;
 11137	
 11138		perf_swevent_init_cpu(cpu);
 11139	
 11140		mutex_lock(&pmus_lock);
 11141		cpumask_set_cpu(cpu, perf_online_mask);
 11142		list_for_each_entry(pmu, &pmus, entry) {
 11143			cpuctx = per_cpu_ptr(pmu->pmu_cpu_context, cpu);
 11144			ctx = &cpuctx->ctx;
 11145	
 11146			mutex_lock(&ctx->mutex);
 11147			cpuctx->online = 1;
 11148			mutex_unlock(&ctx->mutex);
 11149		}
 11150		mutex_unlock(&pmus_lock);
 11151	
 11152		perf_deferred_install_in_context(cpu);
 11153	
 11154		return 0;
 11155	}
 11156	

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

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