drivers/android/binder_alloc.c:234:21: warning: 'binder_page_lookup' defined but not used

drivers/android/binder_alloc.c:234:21: warning: 'binder_page_lookup' defined but not used

[kernel test robot]

tree:   https://github.com/intel-lab-lkp/linux/commits/Bo-Zhang/binder-switch-alloc-mutex-to-spinlock-for-buffer-metadata/20260904-190447
head:   0eaa7c96e838c958ee4182433326639329ee3733
commit: 0eaa7c96e838c958ee4182433326639329ee3733 binder: add install_mutex to serialize page install and shrinker zap
date:   2 days ago
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20260908/202609081155.54SVIR98-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260908/202609081155.54SVIR98-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/202609081155.54SVIR98-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/android/binder_alloc.c:234:21: warning: 'binder_page_lookup' defined but not used [-Wunused-function]
     234 | static struct page *binder_page_lookup(struct binder_alloc *alloc,
         |                     ^~~~~~~~~~~~~~~~~~


vim +/binder_page_lookup +234 drivers/android/binder_alloc.c

072010abc3ad98b Carlos Llamas 2024-12-10  233  
9e2aa76549b9fd2 Carlos Llamas 2024-12-10 @234  static struct page *binder_page_lookup(struct binder_alloc *alloc,
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  235  				       unsigned long addr)
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  236  {
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  237  	struct mm_struct *mm = alloc->mm;
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  238  	struct page *page;
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  239  	long npages = 0;
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  240  
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  241  	/*
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  242  	 * Find an existing page in the remote mm. If missing,
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  243  	 * don't attempt to fault-in just propagate an error.
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  244  	 */
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  245  	mmap_read_lock(mm);
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  246  	if (binder_alloc_is_mapped(alloc))
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  247  		npages = get_user_pages_remote(mm, addr, 1, FOLL_NOFAULT,
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  248  					       &page, NULL);
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  249  	mmap_read_unlock(mm);
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  250  
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  251  	return npages > 0 ? page : NULL;
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  252  }
9e2aa76549b9fd2 Carlos Llamas 2024-12-10  253  

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