Re: [PATCH 3/5] io_uring: bpf: extend io_uring with bpf struct_ops

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

Hi Ming,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20251104]
[cannot apply to bpf-next/net bpf-next/master bpf/master linus/master v6.18-rc4 v6.18-rc3 v6.18-rc2 v6.18-rc4]
[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/Ming-Lei/io_uring-prepare-for-extending-io_uring-with-bpf/20251105-002757
base:   next-20251104
patch link:    https://lore.kernel.org/r/20251104162123.1086035-4-ming.lei%40redhat.com
patch subject: [PATCH 3/5] io_uring: bpf: extend io_uring with bpf struct_ops
config: parisc-randconfig-r121-20251107 (https://download.01.org/0day-ci/archive/20251108/202511080257.ZRnK6f2W-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511080257.ZRnK6f2W-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/202511080257.ZRnK6f2W-lkp@intel.com/

All errors (new ones prefixed by >>):

   io_uring/bpf.c: In function 'uring_bpf_ops_is_valid_access':
>> io_uring/bpf.c:117:9: error: implicit declaration of function 'bpf_tracing_btf_ctx_access'; did you mean 'bpf_sock_convert_ctx_access'? [-Werror=implicit-function-declaration]
     return bpf_tracing_btf_ctx_access(off, size, type, prog, info);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
            bpf_sock_convert_ctx_access
   In file included from include/linux/bpf_verifier.h:7,
                    from io_uring/bpf.c:9:
   io_uring/bpf.c: In function 'io_bpf_init':
   include/linux/bpf.h:2044:50: warning: statement with no effect [-Wunused-value]
    #define register_bpf_struct_ops(st_ops, type) ({ (void *)(st_ops); 0; })
                                                     ^~~~~~~~~~~~~~~~
   io_uring/bpf.c:303:8: note: in expansion of macro 'register_bpf_struct_ops'
     err = register_bpf_struct_ops(&bpf_uring_bpf_ops, uring_bpf_ops);
           ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from <command-line>:
   In function 'io_kiocb_cmd_sz_check',
       inlined from 'io_uring_bpf_prep' at io_uring/bpf.c:41:32:
   include/linux/compiler_types.h:603:38: error: call to '__compiletime_assert_513' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                         ^
   include/linux/compiler_types.h:584:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler_types.h:603:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
     ^~~~~~~~~~~~~~~~
   include/linux/io_uring_types.h:655:2: note: in expansion of macro 'BUILD_BUG_ON'
     BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
     ^~~~~~~~~~~~
   In function 'io_kiocb_cmd_sz_check',
       inlined from '__io_uring_bpf_issue.isra.4' at io_uring/bpf.c:58:32,
       inlined from 'io_uring_bpf_issue' at io_uring/bpf.c:72:9:
   include/linux/compiler_types.h:603:38: error: call to '__compiletime_assert_513' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                         ^
   include/linux/compiler_types.h:584:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler_types.h:603:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
     ^~~~~~~~~~~~~~~~
   include/linux/io_uring_types.h:655:2: note: in expansion of macro 'BUILD_BUG_ON'
     BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
     ^~~~~~~~~~~~
   In function 'io_kiocb_cmd_sz_check',
       inlined from '__io_uring_bpf_issue.isra.4' at io_uring/bpf.c:58:32,
       inlined from 'io_uring_bpf_issue' at io_uring/bpf.c:77:9:
   include/linux/compiler_types.h:603:38: error: call to '__compiletime_assert_513' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                         ^
   include/linux/compiler_types.h:584:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler_types.h:603:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
     ^~~~~~~~~~~~~~~~
   include/linux/io_uring_types.h:655:2: note: in expansion of macro 'BUILD_BUG_ON'
     BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
     ^~~~~~~~~~~~
   In function 'io_kiocb_cmd_sz_check',
       inlined from 'io_uring_bpf_fail' at io_uring/bpf.c:82:32:
   include/linux/compiler_types.h:603:38: error: call to '__compiletime_assert_513' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                         ^
   include/linux/compiler_types.h:584:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler_types.h:603:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
     ^~~~~~~~~~~~~~~~
   include/linux/io_uring_types.h:655:2: note: in expansion of macro 'BUILD_BUG_ON'
     BUILD_BUG_ON(cmd_sz > sizeof(struct io_cmd_data));
     ^~~~~~~~~~~~
   include/linux/io_uring_types.h: In function 'io_uring_bpf_cleanup':
   include/linux/compiler_types.h:603:38: error: call to '__compiletime_assert_513' declared with attribute error: BUILD_BUG_ON failed: cmd_sz > sizeof(struct io_cmd_data)
     _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                         ^
   include/linux/compiler_types.h:584:4: note: in definition of macro '__compiletime_assert'


vim +117 io_uring/bpf.c

   111	
   112	static bool uring_bpf_ops_is_valid_access(int off, int size,
   113					       enum bpf_access_type type,
   114					       const struct bpf_prog *prog,
   115					       struct bpf_insn_access_aux *info)
   116	{
 > 117		return bpf_tracing_btf_ctx_access(off, size, type, prog, info);
   118	}
   119	

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