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Date: Mon, 16 Aug 2021 20:54:31 +0800
From: kernel test robot <lkp@...el.com>
To: Björn Töpel <bjorn.topel@...el.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Daniel Borkmann <daniel@...earbox.net>
Subject: include/linux/filter.h:363:18: warning: cast between incompatible
function types from 'int (*)(struct bpf_map *, void *, void *, u64)' {aka
'int (*)(struct bpf_map *, void *, void *, long long unsigned int)'} to 'u64
(*)(u64, u64, u64, u64, u64)' {aka...
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7c60610d476766e128cc4284bb6349732cbd6606
commit: e6a4750ffe9d701c4d55212b14b615e63571d235 bpf, xdp: Make bpf_redirect_map() a map operation
date: 5 months ago
config: arc-randconfig-p002-20210813 (attached as .config)
compiler: arceb-elf-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# 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
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
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:363:18: 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:11662:37: 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:363:18: warning: cast between incompatible function types from 'void * (*)(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:12070:45: note: in expansion of macro 'BPF_CAST_CALL'
12070 | insn->imm = BPF_CAST_CALL(ops->map_lookup_elem) -
| ^~~~~~~~~~~~~
>> include/linux/filter.h:363:18: warning: cast between incompatible function types from 'int (*)(struct bpf_map *, void *, void *, u64)' {aka 'int (*)(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:12074:45: note: in expansion of macro 'BPF_CAST_CALL'
12074 | insn->imm = BPF_CAST_CALL(ops->map_update_elem) -
| ^~~~~~~~~~~~~
>> include/linux/filter.h:363:18: warning: cast between incompatible function types from 'int (*)(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:12078:45: note: in expansion of macro 'BPF_CAST_CALL'
12078 | insn->imm = BPF_CAST_CALL(ops->map_delete_elem) -
| ^~~~~~~~~~~~~
>> include/linux/filter.h:363:18: warning: cast between incompatible function types from 'int (*)(struct bpf_map *, void *, u64)' {aka 'int (*)(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:12082:45: note: in expansion of macro 'BPF_CAST_CALL'
12082 | insn->imm = BPF_CAST_CALL(ops->map_push_elem) -
| ^~~~~~~~~~~~~
>> include/linux/filter.h:363:18: warning: cast between incompatible function types from 'int (*)(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:12086:45: note: in expansion of macro 'BPF_CAST_CALL'
12086 | insn->imm = BPF_CAST_CALL(ops->map_pop_elem) -
| ^~~~~~~~~~~~~
>> include/linux/filter.h:363:18: warning: cast between incompatible function types from 'int (*)(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:12090:45: note: in expansion of macro 'BPF_CAST_CALL'
12090 | insn->imm = BPF_CAST_CALL(ops->map_peek_elem) -
| ^~~~~~~~~~~~~
>> include/linux/filter.h:363:18: warning: cast between incompatible function types from 'int (*)(struct bpf_map *, u32, u64)' {aka 'int (*)(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:12094:45: note: in expansion of macro 'BPF_CAST_CALL'
12094 | insn->imm = BPF_CAST_CALL(ops->map_redirect) -
| ^~~~~~~~~~~~~
vim +363 include/linux/filter.h
f8f6d679aaa78b9 Daniel Borkmann 2014-05-29 361
09772d92cd5ad99 Daniel Borkmann 2018-06-02 362 #define BPF_CAST_CALL(x) \
09772d92cd5ad99 Daniel Borkmann 2018-06-02 @363 ((u64 (*)(u64, u64, u64, u64, u64))(x))
09772d92cd5ad99 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@...earbox.net>
:::::: CC: Alexei Starovoitov <ast@...nel.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Download attachment ".config.gz" of type "application/gzip" (37577 bytes)
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