[android-common:android17-6.18 0/1] drivers/android/binder.c:7389:2: error: call to undeclared function 'unload_binderfs'; ISO C99 and later do not support implicit function declarations

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

tree:   https://android.googlesource.com/kernel/common android17-6.18
head:   ba857eb99ec955367580dc1c301b326e13ef6524
commit: 42393aa5693a216b395461b4edcf1ba46526b64e [0/1] ANDROID: binder: support loading both drivers at the same time
config: x86_64-buildonly-randconfig-004-20260117 (https://download.01.org/0day-ci/archive/20260117/202601171842.FXaePKaa-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/20260117/202601171842.FXaePKaa-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/202601171842.FXaePKaa-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/android/binder.c:7389:2: error: call to undeclared function 'unload_binderfs'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    7389 |         unload_binderfs();
         |         ^
   drivers/android/binder.c:7389:2: note: did you mean 'init_binderfs'?
   drivers/android/binder_internal.h:103:26: note: 'init_binderfs' declared here
     103 | static inline int __init init_binderfs(void)
         |                          ^
   1 error generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for I2C_K1
   Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && OF [=n]
   Selected by [m]:
   - MFD_SPACEMIT_P1 [=m] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && I2C [=y]


vim +/unload_binderfs +7389 drivers/android/binder.c

  7385	
  7386	void binder_unload_builtin(void)
  7387	{
  7388		genl_unregister_family(&binder_nl_family);
> 7389		unload_binderfs();
  7390		debugfs_remove_recursive(binder_debugfs_dir_entry_root);
  7391		binder_alloc_shrinker_exit();
  7392		binder_remove_trace_events(THIS_MODULE);
  7393	}
  7394	

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