66 	struct mem_section *section = NULL;  in sparse_index_alloc()  local
71 		section = kzalloc_node(array_size, GFP_KERNEL, nid);  in sparse_index_alloc()
73 		section = memblock_alloc_node(array_size, SMP_CACHE_BYTES,  in sparse_index_alloc()
75 		if (!section)  in sparse_index_alloc()
80 	return section;  in sparse_index_alloc()
86 	struct mem_section *section;  in sparse_index_init()  local
89 	 * An existing section is possible in the sub-section hotplug  in sparse_index_init()
91 	 * the existing section.  in sparse_index_init()
98 	section = sparse_index_alloc(nid);  in sparse_index_init()
99 	if (!section)  in sparse_index_init()
102 	mem_section[root] = section;  in sparse_index_init()
141  * mem_map, we use section_mem_map to store the section's NUMA
150 static inline int sparse_early_nid(struct mem_section *section)  in sparse_early_nid()  argument
152 	return (section->section_mem_map >> SECTION_NID_SHIFT);  in sparse_early_nid()
278 		unsigned long section = pfn_to_section_nr(pfn);  in memory_present()  local
281 		sparse_index_init(section, nid);  in memory_present()
282 		set_section_nid(section, nid);  in memory_present()
284 		ms = __nr_to_section(section);  in memory_present()
363 	 * page being freed and making a section unremovable while  in sparse_early_usemaps_alloc_pgdat_section()
365 	 * a pgdat can prevent a section being removed. If section A  in sparse_early_usemaps_alloc_pgdat_section()
366 	 * contains a pgdat and section B contains the usemap, both  in sparse_early_usemaps_alloc_pgdat_section()
368 	 * from the same section as the pgdat where possible to avoid  in sparse_early_usemaps_alloc_pgdat_section()
412 		pr_info("node %d must be removed before remove section %ld\n",  in check_usemap_section_nr()
418 	 * Some platforms allow un-removable section because they will just  in check_usemap_section_nr()
420 	 * Just notify un-removable section's number here.  in check_usemap_section_nr()
422 …pr_info("Section %ld and %ld (node %d) have a circular dependency on usemap and pgdat allocations\…  in check_usemap_section_nr()
577  * for each and record the physical to section mapping.
724 		 * When this function is called, the removing section is  in free_map_bootmem()
726 		 * from page allocator. If removing section's memmap is placed  in free_map_bootmem()
727 		 * on the same section, it must not be freed.  in free_map_bootmem()
753 				"section already deactivated (%#lx + %ld)\n",  in section_deactivate()
761 	 * 1/ deactivation of a partial hot-added section (only possible  in section_deactivate()
763 	 *    a/ section was present at memory init  in section_deactivate()
764 	 *    b/ section was hot-added post memory init  in section_deactivate()
765 	 * 2/ deactivation of a complete hot-added section  in section_deactivate()
766 	 * 3/ deactivation of a complete section from memory init  in section_deactivate()
830 	 * referenced.  If we hot-add memory into such a section then we  in section_activate()
847  * sparse_add_section - add a memory section, or populate an existing one
848  * @nid: The node to add section on
850  * @nr_pages: number of pfns to add in the section
857  * * -EEXIST	- Section has been present.
886 	/* Align memmap to section boundary in the subsection case */  in sparse_add_section()
900 	 * A further optimization is to have per section refcounted  in clear_hwpoisoned_pages()