On Mon, Jan 13, 2025 at 8:11 AM Jason Xing <kerneljasonxing@xxxxxxxxx> wrote: > > Thanks for the report. > > On Sun, Jan 12, 2025 at 10:50 PM kernel test robot <lkp@xxxxxxxxx> wrote: > > > > Hi Jason, > > > > kernel test robot noticed the following build warnings: > > > > [auto build test WARNING on net-next/main] > > > > url: https://github.com/intel-lab-lkp/linux/commits/Jason-Xing/net-timestamp-add-support-for-bpf_setsockopt/20250112-194115 > > base: net-next/main > > patch link: https://lore.kernel.org/r/20250112113748.73504-2-kerneljasonxing%40gmail.com > > patch subject: [PATCH net-next v5 01/15] net-timestamp: add support for bpf_setsockopt() > > config: i386-buildonly-randconfig-005-20250112 (https://download.01.org/0day-ci/archive/20250112/202501122252.dqEPb1Wd-lkp@xxxxxxxxx/config) > > compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250112/202501122252.dqEPb1Wd-lkp@xxxxxxxxx/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 <lkp@xxxxxxxxx> > > | Closes: https://lore.kernel.org/oe-kbuild-all/202501122252.dqEPb1Wd-lkp@xxxxxxxxx/ > > > > All warnings (new ones prefixed by >>): > > > > net/core/filter.c: In function 'sk_bpf_set_cb_flags': > > net/core/filter.c:5237:11: error: 'struct sock' has no member named 'sk_bpf_cb_flags' > > 5237 | sk->sk_bpf_cb_flags = sk_bpf_cb_flags; > > | ^~ > > Strange. In this series, I've already ensured that the caller of > sk_bpf_set_cb_flags is protected under CONFIG_BPF_SYSCALL, which is > the same as sk_bpf_cb_flags. > > I wonder how it accesses the sk_bpf_cb_flags field if the function it > belongs to is not used, see more details as below (like "defined but > not used"). Well, I still can't figure out how it happened. In the next respin, I will try "#ifdef CONFIG_BPF" which bpf_sock_ops_cb_flags uses. Thanks, Jason
