tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.9
head:   4148278970e6bb725edb3fd5cc91c3d83cc16a97
commit: 6e0398880e744cdd7e8ea21c830d010dd62e8582 [47/79] coresight: tmc-etf: Do not call smp_processor_id from preemptible
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 6e0398880e744cdd7e8ea21c830d010dd62e8582
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=arm64 

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

All errors (new ones prefixed by >>):

   drivers//hwtracing/coresight/coresight-tmc-etf.c: In function 'tmc_alloc_etf_buffer':
>> drivers//hwtracing/coresight/coresight-tmc-etf.c:295:10: error: 'event' undeclared (first use in this function); did you mean 'io_event'?
     node = (event->cpu == -1) ? NUMA_NO_NODE : cpu_to_node(event->cpu);
             ^~~~~
             io_event
   drivers//hwtracing/coresight/coresight-tmc-etf.c:295:10: note: each undeclared identifier is reported only once for each function it appears in

vim +295 drivers//hwtracing/coresight/coresight-tmc-etf.c

   288	
   289	static void *tmc_alloc_etf_buffer(struct coresight_device *csdev, int cpu,
   290					  void **pages, int nr_pages, bool overwrite)
   291	{
   292		int node;
   293		struct cs_buffers *buf;
   294	
 > 295		node = (event->cpu == -1) ? NUMA_NO_NODE : cpu_to_node(event->cpu);
   296	
   297		/* Allocate memory structure for interaction with Perf */
   298		buf = kzalloc_node(sizeof(struct cs_buffers), GFP_KERNEL, node);
   299		if (!buf)
   300			return NULL;
   301	
   302		buf->snapshot = overwrite;
   303		buf->nr_pages = nr_pages;
   304		buf->data_pages = pages;
   305	
   306		return buf;
   307	}
   308	

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0-DAY kernel test infrastructure                 Open Source Technology Center
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