[kbuild-all] Re: [arm-platforms:hack/m1-pmu 8/8] drivers/perf/apple_m1_cpu_pmu.c:100:32: warning: initializer overrides prior initialization of this subobject

On 2021-11-14 08:25, kernel test robot wrote: > tree: > https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git > hack/m1-pmu > head: a905c66ae0b391425e9ad7f261ad7b4c33af2c07 > commit: a905c66ae0b391425e9ad7f261ad7b4c33af2c07 [8/8] drivers/perf: > Add Apple icestorm/firestorm CPU PMU driver > config: arm64-randconfig-r036-20211114 (attached as .config) > compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project > c3dddeeafb529e769cde87bd29ef6271ac6bfa5c) > 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 > # install arm64 cross compiling tool for clang build > # apt-get install binutils-aarch64-linux-gnu > # > https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/com... > git remote add arm-platforms > https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git > git fetch --no-tags arm-platforms hack/m1-pmu > git checkout a905c66ae0b391425e9ad7f261ad7b4c33af2c07 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 > ARCH=arm64 > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp(a)intel.com&gt; > > All warnings (new ones prefixed by >>): > >>> drivers/perf/apple_m1_cpu_pmu.c:100:32: warning: initializer >>> overrides prior initialization of this subobject >>> [-Winitializer-overrides] > [M1_PMU_PERFCTR_UNKNOWN_01] = BIT(7), > ^~~~~~ > include/vdso/bits.h:7:19: note: expanded from macro 'BIT' > #define BIT(nr) (UL(1) << (nr)) > ^~~~~~~~~~~~~~~ > drivers/perf/apple_m1_cpu_pmu.c:99:32: note: previous initialization > is here > [0 ... M1_PMU_PERFCTR_LAST] = ANY_BUT_0_1, > ^~~~~~~~~~~ Oh please, not that thing again. I've commented on this many times, and this warning is just bogus. Initialisation override is a necessity, and working around this warning leads to something that is far less maintainable, and thus more *dangerous* than this. I really wish this warning was simply turned off, because it only leads to the robot emails to be ignored do to the number of false positives.