linux/include/linux/bootmem_info.h

/* 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 page->lru.next. These have to be in
 * some random range in unsigned long space for debugging purposes.
 */
enum { … };

#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
void __init register_page_bootmem_info_node(struct pglist_data *pgdat);

void get_page_bootmem(unsigned long info, struct page *page,
		      unsigned long type);
void put_page_bootmem(struct page *page);

/*
 * 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)
{ … }
#else
static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
}

static inline void put_page_bootmem(struct page *page)
{
}

static inline void get_page_bootmem(unsigned long info, struct page *page,
				    unsigned long 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 */