[android-common:android15-6.6-desktop 15/67] mm/swap.c:722:9: error: implicit declaration of function 'folio_update_drain'; did you mean 'folio_activate_drain'?

[android-common:android15-6.6-desktop 15/67] mm/swap.c:722:9: error: implicit declaration of function 'folio_update_drain'; did you mean 'folio_activate_drain'?

[kernel test robot]

tree:   https://android.googlesource.com/kernel/common android15-6.6-desktop
head:   e2b6daceb83c9b9ae90fca4b78fc265484ded662
commit: 502d91a72b9c5bef5d3ae1b7b2b3a9901a8a4e2f [15/67] CHROMIUM: mm/mglru: slow down promotion through page tables
config: arm-vf610m4_defconfig (https://download.01.org/0day-ci/archive/20241117/202411170103.PPdWSFlT-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241117/202411170103.PPdWSFlT-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/202411170103.PPdWSFlT-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/swap.c: In function 'lru_add_drain_cpu':
>> mm/swap.c:722:9: error: implicit declaration of function 'folio_update_drain'; did you mean 'folio_activate_drain'? [-Wimplicit-function-declaration]
     722 |         folio_update_drain(cpu);
         |         ^~~~~~~~~~~~~~~~~~
         |         folio_activate_drain


vim +722 mm/swap.c

   685	
   686	/*
   687	 * Drain pages out of the cpu's folio_batch.
   688	 * Either "cpu" is the current CPU, and preemption has already been
   689	 * disabled; or "cpu" is being hot-unplugged, and is already dead.
   690	 */
   691	void lru_add_drain_cpu(int cpu)
   692	{
   693		struct cpu_fbatches *fbatches = &per_cpu(cpu_fbatches, cpu);
   694		struct folio_batch *fbatch = &fbatches->lru_add;
   695	
   696		if (folio_batch_count(fbatch))
   697			folio_batch_move_lru(fbatch, lru_add_fn);
   698	
   699		fbatch = &per_cpu(lru_rotate.fbatch, cpu);
   700		/* Disabling interrupts below acts as a compiler barrier. */
   701		if (data_race(folio_batch_count(fbatch))) {
   702			unsigned long flags;
   703	
   704			/* No harm done if a racing interrupt already did this */
   705			local_lock_irqsave(&lru_rotate.lock, flags);
   706			folio_batch_move_lru(fbatch, lru_move_tail_fn);
   707			local_unlock_irqrestore(&lru_rotate.lock, flags);
   708		}
   709	
   710		fbatch = &fbatches->lru_deactivate_file;
   711		if (folio_batch_count(fbatch))
   712			folio_batch_move_lru(fbatch, lru_deactivate_file_fn);
   713	
   714		fbatch = &fbatches->lru_deactivate;
   715		if (folio_batch_count(fbatch))
   716			folio_batch_move_lru(fbatch, lru_deactivate_fn);
   717	
   718		fbatch = &fbatches->lru_lazyfree;
   719		if (folio_batch_count(fbatch))
   720			folio_batch_move_lru(fbatch, lru_lazyfree_fn);
   721	
 > 722		folio_update_drain(cpu);
   723	}
   724	

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