linux-kernel - Re: [PATCH 3/3] tracing: Histogram for missed timer offsets

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Date:   Mon, 22 Aug 2016 14:41:11 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Binoy Jayan <binoy.jayan@...aro.org>
Cc:     kbuild-all@...org, Arnd Bergmann <arnd@...db.de>,
        linaro-kernel@...ts.linaro.org,
        Daniel Wagner <daniel.wagner@...-carit.de>,
        Carsten Emde <C.Emde@...dl.org>, linux-kernel@...r.kernel.org,
        "Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
        Binoy Jayan <binoy.jayan@...aro.org>
Subject: Re: [PATCH 3/3] tracing: Histogram for missed timer offsets

Hi Binoy,

[auto build test ERROR on tip/perf/core]
[also build test ERROR on v4.8-rc3 next-20160819]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Binoy-Jayan/tracing-Deference-pointers-without-RCU-checks/20160818-151235
config: powerpc-c2k_defconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 5.4.0-6) 5.4.0 20160609
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 errors (new ones prefixed by >>):

   kernel/built-in.o: In function `atomic_read':
>> arch/powerpc/include/asm/atomic.h:37: undefined reference to `__tracepoint_latency_hrtimer_interrupt'
>> arch/powerpc/include/asm/atomic.h:37: undefined reference to `__tracepoint_latency_hrtimer_interrupt'
   kernel/built-in.o: In function `__hrtimer_run_queues':
   kernel/time/hrtimer.c:1298: undefined reference to `__tracepoint_latency_hrtimer_interrupt'
   kernel/built-in.o: In function `trace_missed_hrtimer':
   kernel/time/hrtimer.c:1283: undefined reference to `__tracepoint_latency_hrtimer_interrupt'

vim +37 arch/powerpc/include/asm/atomic.h

dc53617c arch/powerpc/include/asm/atomic.h Boqun Feng         2016-01-06  31  })
dc53617c arch/powerpc/include/asm/atomic.h Boqun Feng         2016-01-06  32  
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  33  static __inline__ int atomic_read(const atomic_t *v)
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  34  {
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  35  	int t;
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  36  
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11 @37  	__asm__ __volatile__("lwz%U1%X1 %0,%1" : "=r"(t) : "m"(v->counter));
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  38  
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  39  	return t;
9f0cbea0 include/asm-powerpc/atomic.h      Segher Boessenkool 2007-08-11  40  }

:::::: The code at line 37 was first introduced by commit
:::::: 9f0cbea0d8cc47801b853d3c61d0e17475b0cc89 [POWERPC] Implement atomic{, 64}_{read, write}() without volatile

:::::: TO: Segher Boessenkool <segher@...nel.crashing.org>
:::::: CC: Paul Mackerras <paulus@...ba.org>

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