Re: [PATCH 3/9] mm: Call free_transhuge_folio() directly from destroy_large_folio()

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

Hi Matthew,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on linus/master v6.5-rc6 next-20230809]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox-Oracle/io_uring-Stop-calling-free_compound_page/20230815-112847
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20230815032645.1393700-4-willy%40infradead.org
patch subject: [PATCH 3/9] mm: Call free_transhuge_folio() directly from destroy_large_folio()
config: arm-randconfig-r046-20230815 (https://download.01.org/0day-ci/archive/20230815/202308151509.ErdX8wsj-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230815/202308151509.ErdX8wsj-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/202308151509.ErdX8wsj-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/page_alloc.c:615:3: error: call to undeclared function 'free_transhuge_folio'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     615 |                 free_transhuge_folio(folio);
         |                 ^
   1 error generated.


vim +/free_transhuge_folio +615 mm/page_alloc.c

   604	
   605	void destroy_large_folio(struct folio *folio)
   606	{
   607		enum compound_dtor_id dtor = folio->_folio_dtor;
   608	
   609		if (folio_test_hugetlb(folio)) {
   610			free_huge_page(folio);
   611			return;
   612		}
   613	
   614		if (folio_test_transhuge(folio) && dtor == TRANSHUGE_PAGE_DTOR) {
 > 615			free_transhuge_folio(folio);
   616			return;
   617		}
   618	
   619		VM_BUG_ON_FOLIO(dtor >= NR_COMPOUND_DTORS, folio);
   620		compound_page_dtors[dtor](&folio->page);
   621	}
   622	

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