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1da177e4 LT |
1 | /* internal.h: mm/ internal definitions |
2 | * | |
3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
0f8053a5 NP |
11 | #ifndef __MM_INTERNAL_H |
12 | #define __MM_INTERNAL_H | |
13 | ||
14 | #include <linux/mm.h> | |
1da177e4 | 15 | |
42b77728 JB |
16 | void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, |
17 | unsigned long floor, unsigned long ceiling); | |
18 | ||
01ad1c08 AK |
19 | extern void prep_compound_page(struct page *page, unsigned long order); |
20 | ||
7835e98b | 21 | static inline void set_page_count(struct page *page, int v) |
77a8a788 | 22 | { |
7835e98b NP |
23 | atomic_set(&page->_count, v); |
24 | } | |
25 | ||
26 | /* | |
27 | * Turn a non-refcounted page (->_count == 0) into refcounted with | |
28 | * a count of one. | |
29 | */ | |
30 | static inline void set_page_refcounted(struct page *page) | |
31 | { | |
ae1276b9 | 32 | VM_BUG_ON(PageTail(page)); |
725d704e | 33 | VM_BUG_ON(atomic_read(&page->_count)); |
77a8a788 | 34 | set_page_count(page, 1); |
77a8a788 NP |
35 | } |
36 | ||
0f8053a5 NP |
37 | static inline void __put_page(struct page *page) |
38 | { | |
39 | atomic_dec(&page->_count); | |
40 | } | |
41 | ||
0c0a4a51 | 42 | extern void __free_pages_bootmem(struct page *page, unsigned int order); |
0f8053a5 | 43 | |
48f13bf3 MG |
44 | /* |
45 | * function for dealing with page's order in buddy system. | |
46 | * zone->lock is already acquired when we use these. | |
47 | * So, we don't need atomic page->flags operations here. | |
48 | */ | |
49 | static inline unsigned long page_order(struct page *page) | |
50 | { | |
51 | VM_BUG_ON(!PageBuddy(page)); | |
52 | return page_private(page); | |
53 | } | |
b5a0e011 AH |
54 | |
55 | /* | |
56 | * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node, | |
57 | * so all functions starting at paging_init should be marked __init | |
58 | * in those cases. SPARSEMEM, however, allows for memory hotplug, | |
59 | * and alloc_bootmem_node is not used. | |
60 | */ | |
61 | #ifdef CONFIG_SPARSEMEM | |
62 | #define __paginginit __meminit | |
63 | #else | |
64 | #define __paginginit __init | |
65 | #endif | |
66 | ||
6b74ab97 MG |
67 | /* Memory initialisation debug and verification */ |
68 | enum mminit_level { | |
69 | MMINIT_WARNING, | |
70 | MMINIT_VERIFY, | |
71 | MMINIT_TRACE | |
72 | }; | |
73 | ||
74 | #ifdef CONFIG_DEBUG_MEMORY_INIT | |
75 | ||
76 | extern int mminit_loglevel; | |
77 | ||
78 | #define mminit_dprintk(level, prefix, fmt, arg...) \ | |
79 | do { \ | |
80 | if (level < mminit_loglevel) { \ | |
81 | printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \ | |
82 | printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \ | |
83 | } \ | |
84 | } while (0) | |
85 | ||
708614e6 MG |
86 | extern void mminit_verify_pageflags_layout(void); |
87 | extern void mminit_verify_page_links(struct page *page, | |
88 | enum zone_type zone, unsigned long nid, unsigned long pfn); | |
68ad8df4 | 89 | extern void mminit_verify_zonelist(void); |
708614e6 | 90 | |
6b74ab97 MG |
91 | #else |
92 | ||
93 | static inline void mminit_dprintk(enum mminit_level level, | |
94 | const char *prefix, const char *fmt, ...) | |
95 | { | |
96 | } | |
97 | ||
708614e6 MG |
98 | static inline void mminit_verify_pageflags_layout(void) |
99 | { | |
100 | } | |
101 | ||
102 | static inline void mminit_verify_page_links(struct page *page, | |
103 | enum zone_type zone, unsigned long nid, unsigned long pfn) | |
104 | { | |
105 | } | |
68ad8df4 MG |
106 | |
107 | static inline void mminit_verify_zonelist(void) | |
108 | { | |
109 | } | |
6b74ab97 | 110 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
2dbb51c4 MG |
111 | |
112 | /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ | |
113 | #if defined(CONFIG_SPARSEMEM) | |
114 | extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
115 | unsigned long *end_pfn); | |
116 | #else | |
117 | static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
118 | unsigned long *end_pfn) | |
119 | { | |
120 | } | |
121 | #endif /* CONFIG_SPARSEMEM */ | |
122 | ||
0f8053a5 | 123 | #endif |