Re: [PATCH bpf-next v5 1/3] cfi: add C CFI type macro

[kernel test robot]

Hi Maxwell,

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/Maxwell-Bland/arm64-cfi-bpf-Support-kCFI-BPF-on-arm64/20240611-021203
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/cwhnmpn5yvg6ma7mvjviy4p7z6gdoba57daeprpc4zcokfhpv2%4044gvdmcfuspt
patch subject: [PATCH bpf-next v5 1/3] cfi: add C CFI type macro
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20240611/202406111716.SluzXu9X-lkp@xxxxxxxxx/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 4403cdbaf01379de96f8d0d6ea4f51a085e37766)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240611/202406111716.SluzXu9X-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/202406111716.SluzXu9X-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> arch/riscv/kernel/cfi.c:85:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
      85 | DEFINE_CFI_TYPE(cfi_bpf_hash, __bpf_prog_runX);
         | ^
         | int
>> arch/riscv/kernel/cfi.c:85:17: error: a parameter list without types is only allowed in a function definition
      85 | DEFINE_CFI_TYPE(cfi_bpf_hash, __bpf_prog_runX);
         |                 ^
   arch/riscv/kernel/cfi.c:89:1: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
      89 | DEFINE_CFI_TYPE(cfi_bpf_subprog_hash, __bpf_callback_fn);
         | ^
         | int
   arch/riscv/kernel/cfi.c:89:17: error: a parameter list without types is only allowed in a function definition
      89 | DEFINE_CFI_TYPE(cfi_bpf_subprog_hash, __bpf_callback_fn);
         |                 ^
   4 errors generated.


vim +/int +85 arch/riscv/kernel/cfi.c

    81	
    82	/* Must match bpf_func_t / DEFINE_BPF_PROG_RUN() */
    83	extern unsigned int __bpf_prog_runX(const void *ctx,
    84					    const struct bpf_insn *insn);
  > 85	DEFINE_CFI_TYPE(cfi_bpf_hash, __bpf_prog_runX);
    86	

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https://github.com/intel/lkp-tests/wiki