1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __LINUX_BOOTMEM_INFO_H 3#define __LINUX_BOOTMEM_INFO_H 4 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 in 10 * 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_NODE 21void __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 the 29 * buddy will be marked reserved already in the memmap. For those 30 * 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 bootmem 38 * 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 else 45 VM_BUG_ON_PAGE(1, page); 46} 47#else 48static 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#endif 67 68#endif /* __LINUX_BOOTMEM_INFO_H */ 69