[jgunthorpe:iommu_pages 6/20] drivers/iommu/iommu-pages.c:38:40: error: use of undeclared identifier 'NR_IOMMU_PAGES'; did you mean 'NR_MEMMAP_PAGES'?

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

tree:   https://github.com/jgunthorpe/linux iommu_pages
head:   470a82a6588cba1a19210a78a710620a15b6019b
commit: 6c72aac62af905e9c969c12aa399d8bed4b4d033 [6/20] iommu/pages: De-inline the substantial functions
config: hexagon-randconfig-002-20250129 (https://download.01.org/0day-ci/archive/20250129/202501291628.UWEGyLaJ-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 19306351a2c45e266fa11b41eb1362b20b6ca56d)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250129/202501291628.UWEGyLaJ-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/202501291628.UWEGyLaJ-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/iommu/iommu-pages.c:38:40: error: use of undeclared identifier 'NR_IOMMU_PAGES'; did you mean 'NR_MEMMAP_PAGES'?
      38 |         mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, pgcnt);
         |                                               ^~~~~~~~~~~~~~
         |                                               NR_MEMMAP_PAGES
   include/linux/vmstat.h:42:2: note: 'NR_MEMMAP_PAGES' declared here
      42 |         NR_MEMMAP_PAGES,        /* page metadata allocated through buddy allocator */
         |         ^
   drivers/iommu/iommu-pages.c:38:40: warning: implicit conversion from enumeration type 'enum vm_stat_item' to different enumeration type 'enum node_stat_item' [-Wenum-conversion]
      38 |         mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, pgcnt);
         |         ~~~~~~~~~~~~~~~~~~~                   ^~~~~~~~~~~~~~
   drivers/iommu/iommu-pages.c:50:40: error: use of undeclared identifier 'NR_IOMMU_PAGES'; did you mean 'NR_MEMMAP_PAGES'?
      50 |         mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, -pgcnt);
         |                                               ^~~~~~~~~~~~~~
         |                                               NR_MEMMAP_PAGES
   include/linux/vmstat.h:42:2: note: 'NR_MEMMAP_PAGES' declared here
      42 |         NR_MEMMAP_PAGES,        /* page metadata allocated through buddy allocator */
         |         ^
   drivers/iommu/iommu-pages.c:50:40: warning: implicit conversion from enumeration type 'enum vm_stat_item' to different enumeration type 'enum node_stat_item' [-Wenum-conversion]
      50 |         mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, -pgcnt);
         |         ~~~~~~~~~~~~~~~~~~~                   ^~~~~~~~~~~~~~
   2 warnings and 2 errors generated.


vim +38 drivers/iommu/iommu-pages.c

     9	
    10	/**
    11	 * iommu_alloc_pages_node - Allocate a zeroed page of a given order from
    12	 *                          specific NUMA node
    13	 * @nid: memory NUMA node id
    14	 * @gfp: buddy allocator flags
    15	 * @order: page order
    16	 *
    17	 * Returns the virtual address of the allocated page. The page must be
    18	 * freed either by calling iommu_free_page() or via iommu_put_pages_list().
    19	 */
    20	void *iommu_alloc_pages_node(int nid, gfp_t gfp, unsigned int order)
    21	{
    22		const unsigned long pgcnt = 1UL << order;
    23		struct page *page;
    24	
    25		page = alloc_pages_node(nid, gfp | __GFP_ZERO | __GFP_COMP, order);
    26		if (unlikely(!page))
    27			return NULL;
    28	
    29		/*
    30		 * All page allocations that should be reported to as "iommu-pagetables"
    31		 * to userspace must use one of the functions below. This includes
    32		 * allocations of page-tables and other per-iommu_domain configuration
    33		 * structures.
    34		 *
    35		 * This is necessary for the proper accounting as IOMMU state can be
    36		 * rather large, i.e. multiple gigabytes in size.
    37		 */
  > 38		mod_node_page_state(page_pgdat(page), NR_IOMMU_PAGES, pgcnt);
    39		mod_lruvec_page_state(page, NR_SECONDARY_PAGETABLE, pgcnt);
    40	
    41		return page_address(page);
    42	}
    43	EXPORT_SYMBOL_GPL(iommu_alloc_pages_node);
    44	

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