From: kernel test robot <lkp@intel.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [jolsa-perf:bpf/tracing_multi_6 5/24] include/linux/bpf.h:1543:51: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function
Date: Fri, 06 Mar 2026 12:33:53 +0800 [thread overview]
Message-ID: <202603061254.s5Def6q1-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi_6
head: af446b2f2e0f478bc501b1791673d2aa5994101b
commit: 3b32c0175ca684f984fc605e911b80c0d0b6149b [5/24] bpf: Add struct bpf_tramp_node object
config: um-randconfig-002-20260306 (https://download.01.org/0day-ci/archive/20260306/202603061254.s5Def6q1-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c32caeec8158d634bb71ab8911a6031248b9fc47)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260306/202603061254.s5Def6q1-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/202603061254.s5Def6q1-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from kernel/sched/rq-offsets.c:5:
In file included from kernel/sched/sched.h:64:
In file included from include/linux/syscalls_api.h:1:
In file included from include/linux/syscalls.h:95:
In file included from include/trace/syscall.h:7:
In file included from include/linux/trace_events.h:10:
In file included from include/linux/perf_event.h:53:
In file included from include/linux/security.h:35:
>> include/linux/bpf.h:1543:51: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
1543 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
| ^
include/linux/bpf.h:1549:53: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
1549 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
| ^
2 warnings generated.
--
In file included from fs/smb/client/dir.c:17:
In file included from fs/smb/client/cifsglob.h:30:
In file included from fs/smb/client/smb2pdu.h:14:
In file included from include/net/sock.h:46:
In file included from include/linux/netdevice.h:44:
In file included from include/uapi/linux/neighbour.h:6:
In file included from include/linux/netlink.h:9:
In file included from include/net/scm.h:9:
In file included from include/linux/security.h:35:
>> include/linux/bpf.h:1543:51: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
1543 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
| ^
include/linux/bpf.h:1549:53: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
1549 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
| ^
fs/smb/client/dir.c:417:9: warning: variable 'sbflags' is uninitialized when used here [-Wuninitialized]
417 | if (sbflags & CIFS_MOUNT_DYNPERM)
| ^~~~~~~
fs/smb/client/dir.c:190:22: note: initialize the variable 'sbflags' to silence this warning
190 | unsigned int sbflags;
| ^
| = 0
3 warnings generated.
--
In file included from kernel/sched/rq-offsets.c:5:
In file included from kernel/sched/sched.h:64:
In file included from include/linux/syscalls_api.h:1:
In file included from include/linux/syscalls.h:95:
In file included from include/trace/syscall.h:7:
In file included from include/linux/trace_events.h:10:
In file included from include/linux/perf_event.h:53:
In file included from include/linux/security.h:35:
>> include/linux/bpf.h:1543:51: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
1543 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
| ^
include/linux/bpf.h:1549:53: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
1549 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
| ^
2 warnings generated.
vim +1543 include/linux/bpf.h
75ccbef6369e94e Björn Töpel 2019-12-13 1507
75ccbef6369e94e Björn Töpel 2019-12-13 1508 #define DEFINE_BPF_DISPATCHER(name) \
c86df29d11dfba2 Peter Zijlstra 2022-11-03 1509 __BPF_DISPATCHER_SC(name); \
4f9087f16651aca Peter Zijlstra 2023-12-15 1510 noinline __bpfcall unsigned int bpf_dispatcher_##name##_func( \
75ccbef6369e94e Björn Töpel 2019-12-13 1511 const void *ctx, \
75ccbef6369e94e Björn Töpel 2019-12-13 1512 const struct bpf_insn *insnsi, \
af3f4134006bf3b Stanislav Fomichev 2022-06-28 1513 bpf_func_t bpf_func) \
75ccbef6369e94e Björn Töpel 2019-12-13 1514 { \
c86df29d11dfba2 Peter Zijlstra 2022-11-03 1515 return __BPF_DISPATCHER_CALL(name); \
75ccbef6369e94e Björn Töpel 2019-12-13 1516 } \
6a64037d4bf252b Björn Töpel 2020-03-12 1517 EXPORT_SYMBOL(bpf_dispatcher_##name##_func); \
6a64037d4bf252b Björn Töpel 2020-03-12 1518 struct bpf_dispatcher bpf_dispatcher_##name = \
18acb7fac22ff7b Peter Zijlstra 2022-11-03 1519 BPF_DISPATCHER_INIT(bpf_dispatcher_##name);
dbe69b29988465b Jiri Olsa 2022-10-18 1520
75ccbef6369e94e Björn Töpel 2019-12-13 1521 #define DECLARE_BPF_DISPATCHER(name) \
6a64037d4bf252b Björn Töpel 2020-03-12 1522 unsigned int bpf_dispatcher_##name##_func( \
75ccbef6369e94e Björn Töpel 2019-12-13 1523 const void *ctx, \
75ccbef6369e94e Björn Töpel 2019-12-13 1524 const struct bpf_insn *insnsi, \
af3f4134006bf3b Stanislav Fomichev 2022-06-28 1525 bpf_func_t bpf_func); \
6a64037d4bf252b Björn Töpel 2020-03-12 1526 extern struct bpf_dispatcher bpf_dispatcher_##name;
c86df29d11dfba2 Peter Zijlstra 2022-11-03 1527
6a64037d4bf252b Björn Töpel 2020-03-12 1528 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_##name##_func
6a64037d4bf252b Björn Töpel 2020-03-12 1529 #define BPF_DISPATCHER_PTR(name) (&bpf_dispatcher_##name)
75ccbef6369e94e Björn Töpel 2019-12-13 1530 void bpf_dispatcher_change_prog(struct bpf_dispatcher *d, struct bpf_prog *from,
75ccbef6369e94e Björn Töpel 2019-12-13 1531 struct bpf_prog *to);
dba122fb5e122e8 Jiri Olsa 2020-03-12 1532 /* Called only from JIT-enabled code, so there's no need for stubs. */
7c8ce4ffb684676 Xu Kuohai 2024-11-12 1533 void bpf_image_ksym_init(void *data, unsigned int size, struct bpf_ksym *ksym);
7c8ce4ffb684676 Xu Kuohai 2024-11-12 1534 void bpf_image_ksym_add(struct bpf_ksym *ksym);
a108f7dcfa010e3 Jiri Olsa 2020-03-12 1535 void bpf_image_ksym_del(struct bpf_ksym *ksym);
dba122fb5e122e8 Jiri Olsa 2020-03-12 1536 void bpf_ksym_add(struct bpf_ksym *ksym);
dba122fb5e122e8 Jiri Olsa 2020-03-12 1537 void bpf_ksym_del(struct bpf_ksym *ksym);
ca45c84afb8c91a Josh Poimboeuf 2025-12-03 1538 bool bpf_has_frame_pointer(unsigned long ip);
3486bedd99196ec Song Liu 2022-02-04 1539 int bpf_jit_charge_modmem(u32 size);
3486bedd99196ec Song Liu 2022-02-04 1540 void bpf_jit_uncharge_modmem(u32 size);
f92c1e183604c20 Jiri Olsa 2021-12-08 1541 bool bpf_prog_has_trampoline(const struct bpf_prog *prog);
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1542 #else
f7e0beaf39d3868 Kui-Feng Lee 2022-05-10 @1543 static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
d6083f040d5d8f8 Leon Hwang 2024-10-15 1544 struct bpf_trampoline *tr,
d6083f040d5d8f8 Leon Hwang 2024-10-15 1545 struct bpf_prog *tgt_prog)
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1546 {
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1547 return -ENOTSUPP;
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1548 }
f7e0beaf39d3868 Kui-Feng Lee 2022-05-10 1549 static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
d6083f040d5d8f8 Leon Hwang 2024-10-15 1550 struct bpf_trampoline *tr,
d6083f040d5d8f8 Leon Hwang 2024-10-15 1551 struct bpf_prog *tgt_prog)
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1552 {
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1553 return -ENOTSUPP;
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1554 }
f7b12b6fea00988 Toke Høiland-Jørgensen 2020-09-25 1555 static inline struct bpf_trampoline *bpf_trampoline_get(u64 key,
f7b12b6fea00988 Toke Høiland-Jørgensen 2020-09-25 1556 struct bpf_attach_target_info *tgt_info)
f7b12b6fea00988 Toke Høiland-Jørgensen 2020-09-25 1557 {
b724a6418f1f853 Leon Hwang 2023-09-17 1558 return NULL;
f7b12b6fea00988 Toke Høiland-Jørgensen 2020-09-25 1559 }
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1560 static inline void bpf_trampoline_put(struct bpf_trampoline *tr) {}
75ccbef6369e94e Björn Töpel 2019-12-13 1561 #define DEFINE_BPF_DISPATCHER(name)
75ccbef6369e94e Björn Töpel 2019-12-13 1562 #define DECLARE_BPF_DISPATCHER(name)
6a64037d4bf252b Björn Töpel 2020-03-12 1563 #define BPF_DISPATCHER_FUNC(name) bpf_dispatcher_nop_func
75ccbef6369e94e Björn Töpel 2019-12-13 1564 #define BPF_DISPATCHER_PTR(name) NULL
75ccbef6369e94e Björn Töpel 2019-12-13 1565 static inline void bpf_dispatcher_change_prog(struct bpf_dispatcher *d,
75ccbef6369e94e Björn Töpel 2019-12-13 1566 struct bpf_prog *from,
75ccbef6369e94e Björn Töpel 2019-12-13 1567 struct bpf_prog *to) {}
e9b4e606c2289d6 Jiri Olsa 2020-01-23 1568 static inline bool is_bpf_image_address(unsigned long address)
e9b4e606c2289d6 Jiri Olsa 2020-01-23 1569 {
e9b4e606c2289d6 Jiri Olsa 2020-01-23 1570 return false;
e9b4e606c2289d6 Jiri Olsa 2020-01-23 1571 }
f92c1e183604c20 Jiri Olsa 2021-12-08 1572 static inline bool bpf_prog_has_trampoline(const struct bpf_prog *prog)
f92c1e183604c20 Jiri Olsa 2021-12-08 1573 {
f92c1e183604c20 Jiri Olsa 2021-12-08 1574 return false;
f92c1e183604c20 Jiri Olsa 2021-12-08 1575 }
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1576 #endif
fec56f5890d93fc Alexei Starovoitov 2019-11-14 1577
:::::: The code at line 1543 was first introduced by commit
:::::: f7e0beaf39d3868dc700d4954b26cf8443c5d423 bpf, x86: Generate trampolines from bpf_tramp_links
:::::: TO: Kui-Feng Lee <kuifeng@fb.com>
:::::: CC: Andrii Nakryiko <andrii@kernel.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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