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From: kbuild test robot <lkp@intel.com>
To: Daniel Xu <dxu@dxuuu.xyz>
Cc: kbuild-all@01.org, bpf@vger.kernel.org, songliubraving@fb.com,
	yhs@fb.com, andriin@fb.com, peterz@infradead.org,
	mingo@redhat.com, acme@kernel.org, Daniel Xu <dxu@dxuuu.xyz>,
	ast@fb.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com,
	namhyung@kernel.org, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH bpf-next 1/5] perf/core: Add PERF_FORMAT_LOST read_format
Date: Tue, 17 Sep 2019 22:32:34 +0800
Message-ID: <201909172200.sXLlokCN%lkp@intel.com> (raw)
In-Reply-To: <20190917133056.5545-2-dxu@dxuuu.xyz>

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Hi Daniel,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/0day-ci/linux/commits/Daniel-Xu/perf-core-Add-PERF_FORMAT_LOST-read_format/20190917-213515
base:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: i386-tinyconfig (attached as .config)
compiler: gcc-7 (Debian 7.4.0-11) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   kernel/events/core.c: In function 'perf_event_lost':
>> kernel/events/core.c:4753:11: error: implicit declaration of function 'perf_kprobe_missed'; did you mean 'perf_release'? [-Werror=implicit-function-declaration]
      lost += perf_kprobe_missed(event);
              ^~~~~~~~~~~~~~~~~~
              perf_release
   cc1: some warnings being treated as errors

vim +4753 kernel/events/core.c

  4739	
  4740	static struct pmu perf_kprobe;
  4741	static u64 perf_event_lost(struct perf_event *event)
  4742	{
  4743		struct ring_buffer *rb;
  4744		u64 lost = 0;
  4745	
  4746		rcu_read_lock();
  4747		rb = rcu_dereference(event->rb);
  4748		if (likely(!!rb))
  4749			lost += local_read(&rb->lost);
  4750		rcu_read_unlock();
  4751	
  4752		if (event->attr.type == perf_kprobe.type)
> 4753			lost += perf_kprobe_missed(event);
  4754	
  4755		return lost;
  4756	}
  4757	

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

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  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-17 13:30 [PATCH bpf-next 0/5] " Daniel Xu
2019-09-17 13:30 ` [PATCH bpf-next 1/5] perf/core: " Daniel Xu
2019-09-17 14:32   ` kbuild test robot [this message]
2019-09-17 15:22   ` kbuild test robot
2019-09-24  8:33   ` Jiri Olsa
2019-09-27 21:28     ` Daniel Xu
2019-10-25 18:19       ` Daniel Xu
2019-10-28  9:12     ` Peter Zijlstra
2019-09-17 13:30 ` [PATCH bpf-next 2/5] perf/core: Sync perf_event.h to tools Daniel Xu
2019-09-17 13:30 ` [PATCH bpf-next 3/5] libbpf: Add helpers to extract perf fd from bpf_link Daniel Xu
2019-09-17 13:30 ` [PATCH bpf-next 4/5] libbpf: Set read_format PERF_FORMAT_LOST on kprobe perf fds Daniel Xu
2019-09-17 13:30 ` [PATCH bpf-next 5/5] libbpf: Add selftest for PERF_FORMAT_LOST perf read_format Daniel Xu
2019-09-17 15:14 [PATCH bpf-next 1/5] perf/core: Add PERF_FORMAT_LOST read_format Daniel Xu

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