Messages in this thread | | | Date | Wed, 22 Dec 2021 01:15:10 +0800 | From | kernel test robot <> | Subject | [linuxppc:next-test 126/140] arch/powerpc/perf/core-book3s.c:2455:6: warning: no previous prototype for 'power_pmu_wants_prompt_pmi' |
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tree: https://github.com/linuxppc/linux next-test head: 9c4c79c450672b18889a42e6b16a0254ed9721e0 commit: 5a7745b96f43c69f9b4875bcf516a0341acbc3fb [126/140] powerpc/64s/perf: add power_pmu_wants_prompt_pmi to say whether perf wants PMIs to be soft-NMI config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20211222/202112220137.X16y07Dp-lkp@intel.com/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/linuxppc/linux/commit/5a7745b96f43c69f9b4875bcf516a0341acbc3fb git remote add linuxppc https://github.com/linuxppc/linux git fetch --no-tags linuxppc next-test git checkout 5a7745b96f43c69f9b4875bcf516a0341acbc3fb # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/perf/
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> arch/powerpc/perf/core-book3s.c:2455:6: warning: no previous prototype for 'power_pmu_wants_prompt_pmi' [-Wmissing-prototypes] 2455 | bool power_pmu_wants_prompt_pmi(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/power_pmu_wants_prompt_pmi +2455 arch/powerpc/perf/core-book3s.c
2440 2441 /* 2442 * If the perf subsystem wants performance monitor interrupts as soon as 2443 * possible (e.g., to sample the instruction address and stack chain), 2444 * this should return true. The IRQ masking code can then enable MSR[EE] 2445 * in some places (e.g., interrupt handlers) that allows PMI interrupts 2446 * though to improve accuracy of profiles, at the cost of some performance. 2447 * 2448 * The PMU counters can be enabled by other means (e.g., sysfs raw SPR 2449 * access), but in that case there is no need for prompt PMI handling. 2450 * 2451 * This currently returns true if any perf counter is being used. It 2452 * could possibly return false if only events are being counted rather than 2453 * samples being taken, but for now this is good enough. 2454 */ > 2455 bool power_pmu_wants_prompt_pmi(void) 2456 { 2457 struct cpu_hw_events *cpuhw; 2458 2459 /* 2460 * This could simply test local_paca->pmcregs_in_use if that were not 2461 * under ifdef KVM. 2462 */ 2463 2464 if (!ppmu) 2465 return false; 2466 2467 cpuhw = this_cpu_ptr(&cpu_hw_events); 2468 return cpuhw->n_events; 2469 } 2470
--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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