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 | */ |
12 | enum { |
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 |
21 | void __init register_page_bootmem_info_node(struct pglist_data *pgdat); |
22 | |
23 | void get_page_bootmem(unsigned long info, struct page *page, |
24 | unsigned long type); |
25 | void 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 | */ |
32 | static 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 |
48 | static inline void register_page_bootmem_info_node(struct pglist_data *pgdat) |
49 | { |
50 | } |
51 | |
52 | static inline void put_page_bootmem(struct page *page) |
53 | { |
54 | } |
55 | |
56 | static inline void get_page_bootmem(unsigned long info, struct page *page, |
57 | unsigned long type) |
58 | { |
59 | } |
60 | |
61 | static 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 | |