164 static void __section_mark_present(struct mem_section *ms,  in __section_mark_present()  argument
170 	ms->section_mem_map |= SECTION_MARKED_PRESENT;  in __section_mark_present()
194 		struct mem_section *ms;  in subsection_map_init()  local
199 		ms = __nr_to_section(nr);  in subsection_map_init()
200 		subsection_mask_set(ms->usage->subsection_map, pfn, pfns);  in subsection_map_init()
225 		struct mem_section *ms;  in memory_present()  local
230 		ms = __nr_to_section(section_nr);  in memory_present()
231 		if (!ms->section_mem_map) {  in memory_present()
232 			ms->section_mem_map = sparse_encode_early_nid(nid) |  in memory_present()
234 			__section_mark_present(ms, section_nr);  in memory_present()
289 static void __meminit sparse_init_one_section(struct mem_section *ms,  in sparse_init_one_section()  argument
293 	ms->section_mem_map &= ~SECTION_MAP_MASK;  in sparse_init_one_section()
294 	ms->section_mem_map |= sparse_encode_mem_map(mem_map, pnum)  in sparse_init_one_section()
296 	ms->usage = usage;  in sparse_init_one_section()
538 	struct mem_section *ms;  in sparse_init_nid()  local
555 		ms = __nr_to_section(pnum);  in sparse_init_nid()
556 		if (!preinited_vmemmap_section(ms)) {  in sparse_init_nid()
583 		ms = __nr_to_section(pnum);  in sparse_init_nid()
584 		if (!preinited_vmemmap_section(ms))  in sparse_init_nid()
585 			ms->section_mem_map = 0;  in sparse_init_nid()
586 		ms->section_mem_map = 0;  in sparse_init_nid()
636 		struct mem_section *ms;  in online_mem_sections()  local
642 		ms = __nr_to_section(section_nr);  in online_mem_sections()
643 		ms->section_mem_map |= SECTION_IS_ONLINE;  in online_mem_sections()
654 		struct mem_section *ms;  in offline_mem_sections()  local
663 		ms = __nr_to_section(section_nr);  in offline_mem_sections()
664 		ms->section_mem_map &= ~SECTION_IS_ONLINE;  in offline_mem_sections()
696 	struct mem_section *ms = __pfn_to_section(pfn);  in clear_subsection_map()  local
697 	unsigned long *subsection_map = ms->usage  in clear_subsection_map()
698 		? &ms->usage->subsection_map[0] : NULL;  in clear_subsection_map()
713 static bool is_subsection_map_empty(struct mem_section *ms)  in is_subsection_map_empty()  argument
715 	return bitmap_empty(&ms->usage->subsection_map[0],  in is_subsection_map_empty()
721 	struct mem_section *ms = __pfn_to_section(pfn);  in fill_subsection_map()  local
728 	subsection_map = &ms->usage->subsection_map[0];  in fill_subsection_map()
790 static bool is_subsection_map_empty(struct mem_section *ms)  in is_subsection_map_empty()  argument
820 	struct mem_section *ms = __pfn_to_section(pfn);  in section_deactivate()  local
821 	bool section_is_early = early_section(ms);  in section_deactivate()
828 	empty = is_subsection_map_empty(ms);  in section_deactivate()
835 		 * ms->usage array.  in section_deactivate()
837 		ms->section_mem_map &= ~SECTION_HAS_MEM_MAP;  in section_deactivate()
846 		if (!PageReserved(virt_to_page(ms->usage))) {  in section_deactivate()
847 			kfree_rcu(ms->usage, rcu);  in section_deactivate()
848 			WRITE_ONCE(ms->usage, NULL);  in section_deactivate()
850 		memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr);  in section_deactivate()
867 		ms->section_mem_map = (unsigned long)NULL;  in section_deactivate()
874 	struct mem_section *ms = __pfn_to_section(pfn);  in section_activate()  local
879 	if (!ms->usage) {  in section_activate()
883 		ms->usage = usage;  in section_activate()
889 			ms->usage = NULL;  in section_activate()
901 	if (nr_pages < PAGES_PER_SECTION && early_section(ms))  in section_activate()
938 	struct mem_section *ms;  in sparse_add_section()  local
957 	ms = __nr_to_section(section_nr);  in sparse_add_section()
959 	__section_mark_present(ms, section_nr);  in sparse_add_section()
964 	sparse_init_one_section(ms, section_nr, memmap, ms->usage, 0);  in sparse_add_section()
972 	struct mem_section *ms = __pfn_to_section(pfn);  in sparse_remove_section()  local
974 	if (WARN_ON_ONCE(!valid_section(ms)))  in sparse_remove_section()