[hare-nvme:configfs-ns 1/9] drivers/nvme/target/bpf_ops.c:25:16: error: implicit declaration of function 'bpf_tracing_btf_ctx_access'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/hare/nvme.git configfs-ns
head:   509cbb083b05db0f02a3ceea68bb093f8725a6a5
commit: 94040dcdf8d7b146f62dfb3e0156d93a9713880d [1/9] nvmet-bpf: eBPF struct_ops support for log pages
config: loongarch-randconfig-001-20260509 (https://download.01.org/0day-ci/archive/20260509/202605090205.CEh9SC9R-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260509/202605090205.CEh9SC9R-lkp@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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605090205.CEh9SC9R-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/nvme/target/bpf_ops.c: In function 'nvmet_bpf_ops_is_valid_access':
>> drivers/nvme/target/bpf_ops.c:25:16: error: implicit declaration of function 'bpf_tracing_btf_ctx_access' [-Wimplicit-function-declaration]
      25 |         return bpf_tracing_btf_ctx_access(off, size, type, prog, info);
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/bpf_verifier.h:7,
                    from drivers/nvme/target/bpf_ops.c:4:
   drivers/nvme/target/bpf_ops.c: In function 'nvmet_bpf_struct_ops_init':
   include/linux/bpf.h:2142:50: warning: statement with no effect [-Wunused-value]
    2142 | #define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })
         |                                                  ^~~~~~~~~~~~~~~~
   drivers/nvme/target/bpf_ops.c:309:15: note: in expansion of macro 'register_bpf_struct_ops'
     309 |         ret = register_bpf_struct_ops(&bpf_nvmet_bpf_ops, nvmet_bpf_ops);
         |               ^~~~~~~~~~~~~~~~~~~~~~~


vim +/bpf_tracing_btf_ctx_access +25 drivers/nvme/target/bpf_ops.c

    19	
    20	static bool nvmet_bpf_ops_is_valid_access(int off, int size,
    21						  enum bpf_access_type type,
    22						  const struct bpf_prog *prog,
    23						  struct bpf_insn_access_aux *info)
    24	{
  > 25		return bpf_tracing_btf_ctx_access(off, size, type, prog, info);
    26	}
    27	

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