[modules:ppavlu-module-include 32/37] mm/page_alloc.c:6949:2: error: call to undeclared function 'DEFINE_DYNAMIC_DEBUG_METADATA'; ISO C99 and later do not support implicit function declarations

[modules:ppavlu-module-include 32/37] mm/page_alloc.c:6949:2: error: call to undeclared function 'DEFINE_DYNAMIC_DEBUG_METADATA'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/modules/linux.git ppavlu-module-include
head:   fcbfd3cbe0a054838436812cc0b664f71ba1d0a4
commit: 1c6a138c5d5c9156a13a7d82df4f2fec5c2b71a2 [32/37] WIP: module: Avoid including linux/dynamic_debug in linux/module.h
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260820/202608200157.w2LJC8K6-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260820/202608200157.w2LJC8K6-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/202608200157.w2LJC8K6-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/page_alloc.c:6949:2: error: call to undeclared function 'DEFINE_DYNAMIC_DEBUG_METADATA'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    6949 |         DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, "migrate failure");
         |         ^
>> mm/page_alloc.c:6949:32: error: use of undeclared identifier 'descriptor'
    6949 |         DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, "migrate failure");
         |                                       ^~~~~~~~~~
>> mm/page_alloc.c:6951:6: error: call to undeclared function 'DYNAMIC_DEBUG_BRANCH'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    6951 |         if (DYNAMIC_DEBUG_BRANCH(descriptor)) {
         |             ^
   mm/page_alloc.c:6951:27: error: use of undeclared identifier 'descriptor'
    6951 |         if (DYNAMIC_DEBUG_BRANCH(descriptor)) {
         |                                  ^~~~~~~~~~
   4 errors generated.


vim +/DEFINE_DYNAMIC_DEBUG_METADATA +6949 mm/page_alloc.c

4aa4abf1f14bd6 Ryan Roberts    2026-04-01  6944  
8df995f6bde01d Alexandre Ghiti 2019-05-13  6945  #ifdef CONFIG_CONTIG_ALLOC
a1394bddf9b60e Minchan Kim     2021-04-29  6946  /* Usage: See admin-guide/dynamic-debug-howto.rst */
a1394bddf9b60e Minchan Kim     2021-04-29  6947  static void alloc_contig_dump_pages(struct list_head *page_list)
a1394bddf9b60e Minchan Kim     2021-04-29  6948  {
a1394bddf9b60e Minchan Kim     2021-04-29 @6949  	DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, "migrate failure");
a1394bddf9b60e Minchan Kim     2021-04-29  6950  
a1394bddf9b60e Minchan Kim     2021-04-29 @6951  	if (DYNAMIC_DEBUG_BRANCH(descriptor)) {
a1394bddf9b60e Minchan Kim     2021-04-29  6952  		struct page *page;
a1394bddf9b60e Minchan Kim     2021-04-29  6953  
a1394bddf9b60e Minchan Kim     2021-04-29  6954  		dump_stack();
a1394bddf9b60e Minchan Kim     2021-04-29  6955  		list_for_each_entry(page, page_list, lru)
a1394bddf9b60e Minchan Kim     2021-04-29  6956  			dump_page(page, "migration failure");
a1394bddf9b60e Minchan Kim     2021-04-29  6957  	}
a1394bddf9b60e Minchan Kim     2021-04-29  6958  }
a1394bddf9b60e Minchan Kim     2021-04-29  6959  

:::::: The code at line 6949 was first introduced by commit
:::::: a1394bddf9b60e96d075d94b71a8857696598186 mm: page_alloc: dump migrate-failed pages

:::::: TO: Minchan Kim <minchan@kernel.org>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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