[android-common:android16-6.12 0/3] kernel/locking/rwsem.c:1651:2: error: call to undeclared function 'trace_android_vh_rwsem_write_finished'; ISO C99 and later do not support implicit function declarations

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

Hi JianMin,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android16-6.12
head:   9d40b257ba08a2ae9a2cb55b34afe1cff4721b18
commit: 78cf7a145c200d185e2370c712abd8235d1bd5aa [0/3] ANDROID: rwsem: Add vendor hook to the rw-semaphore
config: i386-buildonly-randconfig-002-20260521 (https://download.01.org/0day-ci/archive/20260522/202605220242.7mJigvPC-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260522/202605220242.7mJigvPC-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/202605220242.7mJigvPC-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/locking/rwsem.c:1651:2: error: call to undeclared function 'trace_android_vh_rwsem_write_finished'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1651 |         trace_android_vh_rwsem_write_finished(sem);
         |         ^
   kernel/locking/rwsem.c:1651:2: note: did you mean 'trace_android_vh_rwsem_write_wait_finish'?
   include/trace/hooks/dtask.h:44:1: note: 'trace_android_vh_rwsem_write_wait_finish' declared here
      44 | DECLARE_HOOK(android_vh_rwsem_write_wait_finish,
         | ^
   include/trace/hooks/vendor_hooks.h:119:22: note: expanded from macro 'DECLARE_HOOK'
     119 | #define DECLARE_HOOK DECLARE_EVENT_NOP
         |                      ^
   include/linux/tracepoint.h:605:21: note: expanded from macro 'DECLARE_EVENT_NOP'
     605 |         static inline void trace_##name(proto)                          \
         |                            ^
   <scratch space>:25:1: note: expanded from here
      25 | trace_android_vh_rwsem_write_wait_finish
         | ^
   kernel/locking/rwsem.c:1662:2: error: call to undeclared function 'trace_android_vh_rwsem_write_finished'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1662 |         trace_android_vh_rwsem_write_finished(sem);
         |         ^
   2 errors generated.


vim +/trace_android_vh_rwsem_write_finished +1651 kernel/locking/rwsem.c

  1644	
  1645	/*
  1646	 * release a write lock
  1647	 */
  1648	void up_write(struct rw_semaphore *sem)
  1649	{
  1650		rwsem_release(&sem->dep_map, _RET_IP_);
> 1651		trace_android_vh_rwsem_write_finished(sem);
  1652		__up_write(sem);
  1653	}
  1654	EXPORT_SYMBOL(up_write);
  1655	

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