[openeuler:openEuler-1.0-LTS 1355/1355] mm/pin_mem.c:1075:12: sparse: sparse: symbol 'reserve_idr' was not declared. Should it be static?

[openeuler:openEuler-1.0-LTS 1355/1355] mm/pin_mem.c:1075:12: sparse: sparse: symbol 'reserve_idr' was not declared. Should it be static?

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   a8a9daf97ebc8e303e039402fe784e7bd4e5a9bb
commit: 892de178c180d2924ad5f3dcf55baa3b8ab2272d [1355/1355] pid: add pid reserve method for checkpoint and restore
config: arm64-randconfig-r133-20241227 (https://download.01.org/0day-ci/archive/20241228/202412280946.xMuoN3LG-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20241228/202412280946.xMuoN3LG-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/202412280946.xMuoN3LG-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   mm/pin_mem.c:34:14: sparse: sparse: symbol 'max_pin_pid_num' was not declared. Should it be static?
   mm/pin_mem.c:35:15: sparse: sparse: symbol 'redirect_space_size' was not declared. Should it be static?
   mm/pin_mem.c:171:6: sparse: sparse: symbol 'reserve_page_from_buddy' was not declared. Should it be static?
   mm/pin_mem.c:254:6: sparse: sparse: symbol 'free_user_map_pages' was not declared. Should it be static?
   mm/pin_mem.c:311:6: sparse: sparse: symbol 'check_redirect_end_valid' was not declared. Should it be static?
   mm/pin_mem.c:392:5: sparse: sparse: symbol 'calculate_pin_mem_digest' was not declared. Should it be static?
   mm/pin_mem.c:481:5: sparse: sparse: symbol 'collect_pmd_huge_pages' was not declared. Should it be static?
   mm/pin_mem.c:544:5: sparse: sparse: symbol 'collect_normal_pages' was not declared. Should it be static?
   mm/pin_mem.c:610:6: sparse: sparse: symbol 'free_pin_pages' was not declared. Should it be static?
   mm/pin_mem.c:770:12: sparse: sparse: symbol 'remap_normal_pages' was not declared. Should it be static?
   mm/pin_mem.c:857:12: sparse: sparse: symbol 'remap_huge_pmd_pages' was not declared. Should it be static?
>> mm/pin_mem.c:1075:12: sparse: sparse: symbol 'reserve_idr' was not declared. Should it be static?
   mm/pin_mem.c:844:63: sparse: sparse: not addressable
   mm/pin_mem.c:846:63: sparse: sparse: not addressable
   mm/pin_mem.c:848:71: sparse: sparse: not addressable
   mm/pin_mem.c:851:65: sparse: sparse: not addressable
   mm/pin_mem.c:171:6: warning: no previous prototype for 'reserve_page_from_buddy' [-Wmissing-prototypes]
     171 | void reserve_page_from_buddy(unsigned long nr_pages, struct page *page)
         |      ^~~~~~~~~~~~~~~~~~~~~~~
   mm/pin_mem.c:254:6: warning: no previous prototype for 'free_user_map_pages' [-Wmissing-prototypes]
     254 | void free_user_map_pages(unsigned int pid_index, unsigned int entry_index, unsigned int page_index)
         |      ^~~~~~~~~~~~~~~~~~~
   mm/pin_mem.c:311:6: warning: no previous prototype for 'check_redirect_end_valid' [-Wmissing-prototypes]
     311 | bool check_redirect_end_valid(struct redirect_info *redirect_start,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~
   mm/pin_mem.c:392:5: warning: no previous prototype for 'calculate_pin_mem_digest' [-Wmissing-prototypes]
     392 | int calculate_pin_mem_digest(struct pin_mem_dump_info *pmdi, char *digest)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~
   mm/pin_mem.c:481:5: warning: no previous prototype for 'collect_pmd_huge_pages' [-Wmissing-prototypes]
     481 | int collect_pmd_huge_pages(struct task_struct *task,
         |     ^~~~~~~~~~~~~~~~~~~~~~
   mm/pin_mem.c:544:5: warning: no previous prototype for 'collect_normal_pages' [-Wmissing-prototypes]
     544 | int collect_normal_pages(struct task_struct *task,
         |     ^~~~~~~~~~~~~~~~~~~~
   mm/pin_mem.c: In function 'collect_normal_pages':
   mm/pin_mem.c:549:26: warning: variable 'nr_pages' set but not used [-Wunused-but-set-variable]
     549 |         unsigned long i, nr_pages;
         |                          ^~~~~~~~
   mm/pin_mem.c: At top level:
   mm/pin_mem.c:610:6: warning: no previous prototype for 'free_pin_pages' [-Wmissing-prototypes]
     610 | void free_pin_pages(struct page_map_entry *pme)
         |      ^~~~~~~~~~~~~~
   mm/pin_mem.c:770:12: warning: no previous prototype for 'remap_normal_pages' [-Wmissing-prototypes]
     770 | vm_fault_t remap_normal_pages(struct mm_struct *mm, struct vm_area_struct *vma,
         |            ^~~~~~~~~~~~~~~~~~
   mm/pin_mem.c: In function 'get_hugepage_gfpmask':
   mm/pin_mem.c:844:63: error: lvalue required as unary '&' operand
     844 |         if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags))
         |                                                               ^
   mm/pin_mem.c:846:63: error: lvalue required as unary '&' operand
     846 |         if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags))
         |                                                               ^
   mm/pin_mem.c:848:71: error: lvalue required as unary '&' operand
     848 |         if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags))
         |                                                                       ^
   mm/pin_mem.c:851:65: error: lvalue required as unary '&' operand
     851 |         if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags))
         |                                                                 ^
   mm/pin_mem.c: At top level:
   mm/pin_mem.c:857:12: warning: no previous prototype for 'remap_huge_pmd_pages' [-Wmissing-prototypes]
     857 | vm_fault_t remap_huge_pmd_pages(struct mm_struct *mm, struct vm_area_struct *vma,
         |            ^~~~~~~~~~~~~~~~~~~~

vim +/reserve_idr +1075 mm/pin_mem.c

  1073	
  1074	#ifdef CONFIG_PID_RESERVE
> 1075	struct idr *reserve_idr;
  1076	

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