include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, u32, u64)' {aka 'int (* const)(struct bpf_map *, unsigned int, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64)' {aka...

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   92477dd1faa650e50bd3bb35a6c0b8d09198cc35
commit: e6a4750ffe9d701c4d55212b14b615e63571d235 bpf, xdp: Make bpf_redirect_map() a map operation
date:   7 months ago
config: i386-randconfig-r036-20210927 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e6a4750ffe9d701c4d55212b14b615e63571d235
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e6a4750ffe9d701c4d55212b14b615e63571d235
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   In file included from include/linux/bpf_verifier.h:9,
                    from kernel/bpf/verifier.c:12:
   kernel/bpf/verifier.c: In function 'jit_subprogs':
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'unsigned int (*)(const void *, const struct bpf_insn *)' to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:11662:16: note: in expansion of macro 'BPF_CAST_CALL'
   11662 |    insn->imm = BPF_CAST_CALL(func[subprog]->bpf_func) -
         |                ^~~~~~~~~~~~~
   kernel/bpf/verifier.c: In function 'do_misc_fixups':
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'void * (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12070:17: note: in expansion of macro 'BPF_CAST_CALL'
   12070 |     insn->imm = BPF_CAST_CALL(ops->map_lookup_elem) -
         |                 ^~~~~~~~~~~~~
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *, void *, u64)' {aka 'int (* const)(struct bpf_map *, void *, void *, long long unsigned int)'} to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12074:17: note: in expansion of macro 'BPF_CAST_CALL'
   12074 |     insn->imm = BPF_CAST_CALL(ops->map_update_elem) -
         |                 ^~~~~~~~~~~~~
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12078:17: note: in expansion of macro 'BPF_CAST_CALL'
   12078 |     insn->imm = BPF_CAST_CALL(ops->map_delete_elem) -
         |                 ^~~~~~~~~~~~~
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *, u64)' {aka 'int (* const)(struct bpf_map *, void *, long long unsigned int)'} to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12082:17: note: in expansion of macro 'BPF_CAST_CALL'
   12082 |     insn->imm = BPF_CAST_CALL(ops->map_push_elem) -
         |                 ^~~~~~~~~~~~~
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12086:17: note: in expansion of macro 'BPF_CAST_CALL'
   12086 |     insn->imm = BPF_CAST_CALL(ops->map_pop_elem) -
         |                 ^~~~~~~~~~~~~
   include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, void *)' to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12090:17: note: in expansion of macro 'BPF_CAST_CALL'
   12090 |     insn->imm = BPF_CAST_CALL(ops->map_peek_elem) -
         |                 ^~~~~~~~~~~~~
>> include/linux/filter.h:363:4: warning: cast between incompatible function types from 'int (* const)(struct bpf_map *, u32,  u64)' {aka 'int (* const)(struct bpf_map *, unsigned int,  long long unsigned int)'} to 'u64 (*)(u64,  u64,  u64,  u64,  u64)' {aka 'long long unsigned int (*)(long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int,  long long unsigned int)'} [-Wcast-function-type]
     363 |   ((u64 (*)(u64, u64, u64, u64, u64))(x))
         |    ^
   kernel/bpf/verifier.c:12094:17: note: in expansion of macro 'BPF_CAST_CALL'
   12094 |     insn->imm = BPF_CAST_CALL(ops->map_redirect) -
         |                 ^~~~~~~~~~~~~


vim +363 include/linux/filter.h

f8f6d679aaa78b98 Daniel Borkmann 2014-05-29  361  
09772d92cd5ad998 Daniel Borkmann 2018-06-02  362  #define BPF_CAST_CALL(x)					\
09772d92cd5ad998 Daniel Borkmann 2018-06-02 @363  		((u64 (*)(u64, u64, u64, u64, u64))(x))
09772d92cd5ad998 Daniel Borkmann 2018-06-02  364  

:::::: The code at line 363 was first introduced by commit
:::::: 09772d92cd5ad998b0d5f6f46cd1658f8cb698cf bpf: avoid retpoline for lookup/update/delete calls on maps

:::::: TO: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
:::::: CC: Alexei Starovoitov <ast@xxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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