Re: [PATCH bpf-next 3/8] bpf: Create inner oracle maps

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

Hi Paul,

kernel test robot noticed the following build warnings:

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

url:    https://github.com/intel-lab-lkp/linux/commits/Paul-Chaignon/bpf-Save-pruning-point-states-in-oracle/20251208-102146
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/7229111ef814fd10cac9c3a14d38ddb0f39dc376.1765158925.git.paul.chaignon%40gmail.com
patch subject: [PATCH bpf-next 3/8] bpf: Create inner oracle maps
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20251209/202512091002.b53du7lS-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/202512091002.b53du7lS-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/202512091002.b53du7lS-lkp@intel.com/

All warnings (new ones prefixed by >>):

   kernel/bpf/oracle.c: In function 'patch_oracle_check_insn':
>> kernel/bpf/oracle.c:137:32: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     137 |         ld_addrs[0].imm = (u32)(u64)inner_map;
         |                                ^
   kernel/bpf/oracle.c:138:28: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     138 |         ld_addrs[1].imm = ((u64)inner_map) >> 32;
         |                            ^


vim +137 kernel/bpf/oracle.c

   111	
   112	struct bpf_prog *patch_oracle_check_insn(struct bpf_verifier_env *env, struct bpf_insn *insn,
   113						 int i, int *cnt)
   114	{
   115		struct bpf_insn ld_addrs[2] = {
   116			BPF_LD_IMM64_RAW(0, BPF_PSEUDO_MAP_ORACLE, 0),
   117		};
   118		struct bpf_insn_aux_data *aux = &env->insn_aux_data[i];
   119		struct list_head *head = aux->oracle_states;
   120		struct bpf_insn *insn_buf = env->insn_buf;
   121		struct bpf_prog *new_prog = env->prog;
   122		int num_oracle_states, err;
   123		struct bpf_map *inner_map;
   124	
   125		if (env->subprog_cnt > 1)
   126			/* Skip the oracle if subprogs are used. */
   127			goto noop;
   128	
   129		num_oracle_states = list_count_nodes(head);
   130		if (!num_oracle_states)
   131			goto noop;
   132	
   133		inner_map = create_inner_oracle_map(num_oracle_states);
   134		if (IS_ERR(inner_map))
   135			return (void *)inner_map;
   136	
 > 137		ld_addrs[0].imm = (u32)(u64)inner_map;

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