Re: [PATCH bpf-next v5 2/2] bpf: allow bpf_current_task_under_cgroup() with BPF_CGROUP_*

[kernel test robot]

Hi Matteo,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Matteo-Croce/bpf-enable-generic-kfuncs-for-BPF_CGROUP_-programs/20240815-000517
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20240813132831.184362-3-technoboy85%40gmail.com
patch subject: [PATCH bpf-next v5 2/2] bpf: allow bpf_current_task_under_cgroup() with BPF_CGROUP_*
config: i386-buildonly-randconfig-002-20240816 (https://download.01.org/0day-ci/archive/20240816/202408161356.OvFB1jZi-lkp@xxxxxxxxx/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240816/202408161356.OvFB1jZi-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/202408161356.OvFB1jZi-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: bpf_current_task_under_cgroup_proto
   >>> referenced by bpf_trace.c
   >>>               kernel/trace/bpf_trace.o:(bpf_tracing_func_proto) in archive vmlinux.a

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