[jolsa-perf:bpf/tracing_multi_9 3/12] kernel/bpf/syscall.c:3497:42: error: incompatible pointer types passing 'struct bpf_tramp_node *' to parameter of type 'struct bpf_tramp_link *'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tracing_multi_9
head:   4a1d38e3df06743886a06b547187aec8023ef27d
commit: 79e86aac9eaf3b5bdb4db339fb6082022ef69eb9 [3/12] bpf: Add struct bpf_tramp_node object
config: x86_64-randconfig-161-20260131 (https://download.01.org/0day-ci/archive/20260131/202601311315.nMWUIIfg-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
smatch version: v0.5.0-8994-gd50c5a4c
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260131/202601311315.nMWUIIfg-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/202601311315.nMWUIIfg-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/bpf/syscall.c:5:
   include/linux/bpf.h:1544:51: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
    1544 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
         |                                                   ^
   include/linux/bpf.h:1550:53: warning: declaration of 'struct bpf_tramp_link' will not be visible outside of this function [-Wvisibility]
    1550 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
         |                                                     ^
>> kernel/bpf/syscall.c:3497:42: error: incompatible pointer types passing 'struct bpf_tramp_node *' to parameter of type 'struct bpf_tramp_link *' [-Werror,-Wincompatible-pointer-types]
    3497 |         WARN_ON_ONCE(bpf_trampoline_unlink_prog(&tr_link->link.node,
         |                                                 ^~~~~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:120:25: note: expanded from macro 'WARN_ON_ONCE'
     120 |         int __ret_warn_on = !!(condition);                              \
         |                                ^~~~~~~~~
   include/linux/bpf.h:1550:69: note: passing argument to parameter 'link' here
    1550 | static inline int bpf_trampoline_unlink_prog(struct bpf_tramp_link *link,
         |                                                                     ^
   kernel/bpf/syscall.c:3731:33: error: incompatible pointer types passing 'struct bpf_tramp_node *' to parameter of type 'struct bpf_tramp_link *' [-Werror,-Wincompatible-pointer-types]
    3731 |         err = bpf_trampoline_link_prog(&link->link.node, tr, tgt_prog);
         |                                        ^~~~~~~~~~~~~~~~
   include/linux/bpf.h:1544:67: note: passing argument to parameter 'link' here
    1544 | static inline int bpf_trampoline_link_prog(struct bpf_tramp_link *link,
         |                                                                   ^
   2 warnings and 2 errors generated.


vim +3497 kernel/bpf/syscall.c

  3491	
  3492	static void bpf_tracing_link_release(struct bpf_link *link)
  3493	{
  3494		struct bpf_tracing_link *tr_link =
  3495			container_of(link, struct bpf_tracing_link, link.link);
  3496	
> 3497		WARN_ON_ONCE(bpf_trampoline_unlink_prog(&tr_link->link.node,
  3498							tr_link->trampoline,
  3499							tr_link->tgt_prog));
  3500	
  3501		bpf_trampoline_put(tr_link->trampoline);
  3502	
  3503		/* tgt_prog is NULL if target is a kernel function */
  3504		if (tr_link->tgt_prog)
  3505			bpf_prog_put(tr_link->tgt_prog);
  3506	}
  3507	

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