Re: [PATCH v1 2/4] powerpc/64s/perf: add power_pmu_running to query whether perf is being used

Hi Nicholas,

I love your patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.14-rc6 next-20210816]
[cannot apply to scottwood/next]
[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/Nicholas-Piggin/powerpc-64s-interrupt-speedups/20210816-153424
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-wii_defconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
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/98b8a35aa718c93ace9df66df6274fe392633f80
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Nicholas-Piggin/powerpc-64s-interrupt-speedups/20210816-153424
        git checkout 98b8a35aa718c93ace9df66df6274fe392633f80
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

arch/powerpc/perf/core-book3s.c:2392:6: error: no previous prototype for 'power_pmu_running' [-Werror=missing-prototypes]

    2392 | bool power_pmu_running(void)
         |      ^~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors


vim +/power_pmu_running +2392 arch/powerpc/perf/core-book3s.c

  2391	

2392	bool power_pmu_running(void)

  2393	{
  2394		struct cpu_hw_events *cpuhw;
  2395	
  2396		/* Could this simply test local_paca->pmcregs_in_use? */
  2397	
  2398		if (!ppmu)
  2399			return false;
  2400	
  2401		cpuhw = this_cpu_ptr(&cpu_hw_events);
  2402		return cpuhw->n_events;
  2403	}
  2404	

---
0-DAY CI Kernel Test Service, Intel Corporation
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