/* SPDX-License-Identifier: GPL-2.0 */#ifndef __LINUX_BOOTMEM_INFO_H#define __LINUX_BOOTMEM_INFO_H #include <linux/mm.h>#include <linux/kmemleak.h> /* * Types for free bootmem stored in the low bits of page->private. */enum bootmem_type {	MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 1,	SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,	MIX_SECTION_INFO,	NODE_INFO,	MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,}; #ifdef CONFIG_HAVE_BOOTMEM_INFO_NODEvoid __init register_page_bootmem_info_node(struct pglist_data *pgdat);void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,				  unsigned long nr_pages); void get_page_bootmem(unsigned long info, struct page *page,		enum bootmem_type type);void put_page_bootmem(struct page *page); static inline enum bootmem_type bootmem_type(const struct page *page){	return (unsigned long)page->private & 0xf;} static inline unsigned long bootmem_info(const struct page *page){	return (unsigned long)page->private >> 4;} /* * Any memory allocated via the memblock allocator and not via the * buddy will be marked reserved already in the memmap. For those * pages, we can call this function to free it to buddy allocator. */static inline void free_bootmem_page(struct page *page){	enum bootmem_type type = bootmem_type(page); 	/*	 * The reserve_bootmem_region sets the reserved flag on bootmem	 * pages.	 */	VM_BUG_ON_PAGE(page_ref_count(page) != 2, page); 	if (type == SECTION_INFO || type == MIX_SECTION_INFO)		put_page_bootmem(page);	else		VM_BUG_ON_PAGE(1, page);}#elsestatic inline void register_page_bootmem_info_node(struct pglist_data *pgdat){} static inline void register_page_bootmem_memmap(unsigned long section_nr,		struct page *map, unsigned long nr_pages){} static inline void put_page_bootmem(struct page *page){} static inline enum bootmem_type bootmem_type(const struct page *page){	return SECTION_INFO;} static inline unsigned long bootmem_info(const struct page *page){	return 0;} static inline void get_page_bootmem(unsigned long info, struct page *page,				    enum bootmem_type type){} static inline void free_bootmem_page(struct page *page){	kmemleak_free_part_phys(PFN_PHYS(page_to_pfn(page)), PAGE_SIZE);	free_reserved_page(page);}#endif #endif /* __LINUX_BOOTMEM_INFO_H */