69 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __LINUX_BOOTMEM_INFO_H3#define __LINUX_BOOTMEM_INFO_H4 5#include <linux/mm.h>6#include <linux/kmemleak.h>7 8/*9 * Types for free bootmem stored in page->lru.next. These have to be in10 * some random range in unsigned long space for debugging purposes.11 */12enum {13 MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 12,14 SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,15 MIX_SECTION_INFO,16 NODE_INFO,17 MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,18};19 20#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE21void __init register_page_bootmem_info_node(struct pglist_data *pgdat);22 23void get_page_bootmem(unsigned long info, struct page *page,24 unsigned long type);25void put_page_bootmem(struct page *page);26 27/*28 * Any memory allocated via the memblock allocator and not via the29 * buddy will be marked reserved already in the memmap. For those30 * pages, we can call this function to free it to buddy allocator.31 */32static inline void free_bootmem_page(struct page *page)33{34 unsigned long magic = page->index;35 36 /*37 * The reserve_bootmem_region sets the reserved flag on bootmem38 * pages.39 */40 VM_BUG_ON_PAGE(page_ref_count(page) != 2, page);41 42 if (magic == SECTION_INFO || magic == MIX_SECTION_INFO)43 put_page_bootmem(page);44 else45 VM_BUG_ON_PAGE(1, page);46}47#else48static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)49{50}51 52static inline void put_page_bootmem(struct page *page)53{54}55 56static inline void get_page_bootmem(unsigned long info, struct page *page,57 unsigned long type)58{59}60 61static inline void free_bootmem_page(struct page *page)62{63 kmemleak_free_part_phys(PFN_PHYS(page_to_pfn(page)), PAGE_SIZE);64 free_reserved_page(page);65}66#endif67 68#endif /* __LINUX_BOOTMEM_INFO_H */69