Hi James, kernel test robot noticed the following build warnings:
[auto build test WARNING on bpf-next/master] [also build test WARNING on bpf/master linus/master v6.16-rc7 next-20250725] [cannot apply to bpf-next/net] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/James-Bottomley/bpf-make-bpf_key-an-opaque-type/20250724-224304 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20250724143428.4416-3-James.Bottomley%40HansenPartnership.com patch subject: [PATCH 2/3] bpf: remove bpf_key reference config: i386-randconfig-002-20250725 (https://download.01.org/0day-ci/archive/20250726/202507262040.o1rzhqvf-...@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250726/202507262040.o1rzhqvf-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202507262040.o1rzhqvf-...@intel.com/ All warnings (new ones prefixed by >>): kernel/trace/bpf_trace.c: In function '____bpf_trace_printk': kernel/trace/bpf_trace.c:378:9: warning: function '____bpf_trace_printk' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 378 | ret = bstr_printf(data.buf, MAX_BPRINTF_BUF, fmt, data.bin_args); | ^~~ kernel/trace/bpf_trace.c: In function '____bpf_trace_vprintk': kernel/trace/bpf_trace.c:434:9: warning: function '____bpf_trace_vprintk' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 434 | ret = bstr_printf(data.buf, MAX_BPRINTF_BUF, fmt, data.bin_args); | ^~~ kernel/trace/bpf_trace.c: In function '____bpf_seq_printf': kernel/trace/bpf_trace.c:476:9: warning: function '____bpf_seq_printf' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 476 | seq_bprintf(m, fmt, data.bin_args); | ^~~~~~~~~~~ kernel/trace/bpf_trace.c: In function 'bpf_key_put': >> kernel/trace/bpf_trace.c:1349:37: warning: cast from pointer to integer of >> different size [-Wpointer-to-int-cast] 1349 | if (system_keyring_id_check((u64)bkey->key) < 0) | ^ vim +1349 kernel/trace/bpf_trace.c 1339 1340 /** 1341 * bpf_key_put - decrement key reference count if key is valid and free bpf_key 1342 * @bkey: bpf_key structure 1343 * 1344 * Decrement the reference count of the key inside *bkey*, if the pointer 1345 * is valid, and free *bkey*. 1346 */ 1347 __bpf_kfunc void bpf_key_put(struct bpf_key *bkey) 1348 { > 1349 if (system_keyring_id_check((u64)bkey->key) < 0) 1350 key_put(bkey->key); 1351 1352 kfree(bkey); 1353 } 1354 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
