Hi Hao, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Hao-Luo/bpf-BTF-support-for-ksyms/20200917-064052 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: powerpc-randconfig-s032-20200916 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-201-g24bdaac6-dirty # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> kernel/bpf/helpers.c:631:31: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got void const * @@ >> kernel/bpf/helpers.c:631:31: sparse: expected void const [noderef] __percpu *__vpp_verify >> kernel/bpf/helpers.c:631:31: sparse: got void const * # https://github.com/0day-ci/linux/commit/3f6ea3c1c73efe466a96ff7499219fe3b03b8f48 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hao-Luo/bpf-BTF-support-for-ksyms/20200917-064052 git checkout 3f6ea3c1c73efe466a96ff7499219fe3b03b8f48 vim +631 kernel/bpf/helpers.c 625 626 BPF_CALL_2(bpf_per_cpu_ptr, const void *, ptr, u32, cpu) 627 { 628 if (cpu >= nr_cpu_ids) 629 return (unsigned long)NULL; 630 > 631 return (unsigned long)per_cpu_ptr(ptr, cpu); 632 } 633 634 const struct bpf_func_proto bpf_per_cpu_ptr_proto = { 635 .func = bpf_per_cpu_ptr, 636 .gpl_only = false, 637 .ret_type = RET_PTR_TO_MEM_OR_BTF_ID_OR_NULL, 638 .arg1_type = ARG_PTR_TO_PERCPU_BTF_ID, 639 .arg2_type = ARG_ANYTHING, 640 }; 641 > 642 const struct bpf_func_proto bpf_get_current_task_proto __weak; 643 const struct bpf_func_proto bpf_probe_read_user_proto __weak; 644 const struct bpf_func_proto bpf_probe_read_user_str_proto __weak; 645 const struct bpf_func_proto bpf_probe_read_kernel_proto __weak; 646 const struct bpf_func_proto bpf_probe_read_kernel_str_proto __weak; 647 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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