Hi Alan, 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/Alan-Maguire/bpf-add-helpers-to-... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: x86_64-randconfig-s021-20200917 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-201-g24bdaac6-dirty # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/bpf/btf.c:2467:17: sparse: sparse: Using plain integer as NULL pointer kernel/bpf/btf.c:3244:17: sparse: sparse: Using plain integer as NULL pointer kernel/bpf/btf.c:3585:9: sparse: sparse: Using plain integer as NULL pointer Please review and possibly fold the followup patch. # https://github.com/0day-ci/linux/commit/a85186d405b24251bfd7179ae1949f345... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alan-Maguire/bpf-add-helpers-to-support-BTF-based-kernel-data-display/20200918-213932 git checkout a85186d405b24251bfd7179ae1949f3458e9702d vim +2465 kernel/bpf/btf.c 2452 2453 static void btf_ptr_show(const struct btf *btf, const struct btf_type *t, 2454 u32 type_id, void *data, u8 bits_offset, 2455 struct btf_show *show) 2456 { 2457 void *safe_data; 2458 2459 safe_data = btf_show_start_type(show, t, type_id, data); 2460 if (!safe_data) 2461 return; 2462 2463 /* It is a hashed value unless BTF_SHOW_PTR_RAW is specified */ 2464 if (show->flags & BTF_SHOW_PTR_RAW) 2466 else 2467 btf_show_type_value(show, "0x%p", *(void **)safe_data); 2468 btf_show_end_type(show); 2469 } 2470 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org