Hi Menglong, kernel test robot noticed the following build warnings:
[auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Menglong-Dong/bpf-add-tracing-session-support/20251026-110720 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20251026030143.23807-3-dongml2%40chinatelecom.cn patch subject: [PATCH bpf-next v3 2/7] bpf: add two kfunc for TRACE_SESSION config: i386-buildonly-randconfig-003-20251026 (https://download.01.org/0day-ci/archive/20251026/[email protected]/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251026/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): kernel/trace/bpf_trace.c: In function '____bpf_trace_printk': kernel/trace/bpf_trace.c:377:9: warning: function '____bpf_trace_printk' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 377 | 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:433:9: warning: function '____bpf_trace_vprintk' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 433 | 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:475:9: warning: function '____bpf_seq_printf' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 475 | seq_bprintf(m, fmt, data.bin_args); | ^~~~~~~~~~~ kernel/trace/bpf_trace.c: In function 'bpf_fsession_cookie': >> kernel/trace/bpf_trace.c:3379:16: warning: cast to pointer from integer of >> different size [-Wint-to-pointer-cast] 3379 | return (u64 *)((u64 *)ctx)[nr_args + 2]; | ^ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for I2C_K1 Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && OF [=n] Selected by [y]: - MFD_SPACEMIT_P1 [=y] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && I2C [=y] vim +3379 kernel/trace/bpf_trace.c 3372 3373 __bpf_kfunc u64 *bpf_fsession_cookie(void *ctx) 3374 { 3375 /* This helper call is inlined by verifier. */ 3376 u64 nr_args = ((u64 *)ctx)[-1]; 3377 3378 /* ctx[nr_args + 2] is the session cookie address */ > 3379 return (u64 *)((u64 *)ctx)[nr_args + 2]; 3380 } 3381 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
