Hi Daniel,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on tip/perf/core]
[also build test ERROR on linux/master linus/master v5.12-rc6]
[cannot apply to trace/for-next next-20210408]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daniel-Bristot-de-Oliveira/hwlat-improvements-and-osnoise-tracer/20210408-221655
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git cface0326a6c2ae5c8f47bd466f07624b3e348a7
config: s390-randconfig-c023-20210408 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/8fc23c7171dc536d3ce8c17fb66cfe6fcdbc5fb6
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daniel-Bristot-de-Oliveira/hwlat-improvements-and-osnoise-tracer/20210408-221655
        git checkout 8fc23c7171dc536d3ce8c17fb66cfe6fcdbc5fb6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 

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

All errors (new ones prefixed by >>):

   s390-linux-ld: arch/s390/appldata/appldata_base.o: in function `appldata_generic_handler':
   appldata_base.c:(.text+0x1d0): undefined reference to `sysctl_vals'
   s390-linux-ld: kernel/trace/trace.o: in function `__update_max_tr':
   trace.c:(.text+0x6c0e): undefined reference to `latency_fsnotify'
   s390-linux-ld: kernel/trace/trace_hwlat.o: in function `kthread_fn':
>> trace_hwlat.c:(.text+0xc26): undefined reference to `latency_fsnotify'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org