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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 | ||
894bc310 LS |
42 | /* |
43 | * in mm/vmscan.c: | |
44 | */ | |
62695a84 | 45 | extern int isolate_lru_page(struct page *page); |
894bc310 | 46 | extern void putback_lru_page(struct page *page); |
62695a84 | 47 | |
894bc310 LS |
48 | /* |
49 | * in mm/page_alloc.c | |
50 | */ | |
0c0a4a51 | 51 | extern void __free_pages_bootmem(struct page *page, unsigned int order); |
0f8053a5 | 52 | |
48f13bf3 MG |
53 | /* |
54 | * function for dealing with page's order in buddy system. | |
55 | * zone->lock is already acquired when we use these. | |
56 | * So, we don't need atomic page->flags operations here. | |
57 | */ | |
58 | static inline unsigned long page_order(struct page *page) | |
59 | { | |
60 | VM_BUG_ON(!PageBuddy(page)); | |
61 | return page_private(page); | |
62 | } | |
b5a0e011 | 63 | |
894bc310 LS |
64 | #ifdef CONFIG_UNEVICTABLE_LRU |
65 | /* | |
66 | * unevictable_migrate_page() called only from migrate_page_copy() to | |
67 | * migrate unevictable flag to new page. | |
68 | * Note that the old page has been isolated from the LRU lists at this | |
69 | * point so we don't need to worry about LRU statistics. | |
70 | */ | |
71 | static inline void unevictable_migrate_page(struct page *new, struct page *old) | |
72 | { | |
73 | if (TestClearPageUnevictable(old)) | |
74 | SetPageUnevictable(new); | |
75 | } | |
76 | #else | |
77 | static inline void unevictable_migrate_page(struct page *new, struct page *old) | |
78 | { | |
79 | } | |
80 | #endif | |
81 | ||
82 | ||
b5a0e011 AH |
83 | /* |
84 | * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node, | |
85 | * so all functions starting at paging_init should be marked __init | |
86 | * in those cases. SPARSEMEM, however, allows for memory hotplug, | |
87 | * and alloc_bootmem_node is not used. | |
88 | */ | |
89 | #ifdef CONFIG_SPARSEMEM | |
90 | #define __paginginit __meminit | |
91 | #else | |
92 | #define __paginginit __init | |
93 | #endif | |
94 | ||
6b74ab97 MG |
95 | /* Memory initialisation debug and verification */ |
96 | enum mminit_level { | |
97 | MMINIT_WARNING, | |
98 | MMINIT_VERIFY, | |
99 | MMINIT_TRACE | |
100 | }; | |
101 | ||
102 | #ifdef CONFIG_DEBUG_MEMORY_INIT | |
103 | ||
104 | extern int mminit_loglevel; | |
105 | ||
106 | #define mminit_dprintk(level, prefix, fmt, arg...) \ | |
107 | do { \ | |
108 | if (level < mminit_loglevel) { \ | |
109 | printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \ | |
110 | printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \ | |
111 | } \ | |
112 | } while (0) | |
113 | ||
708614e6 MG |
114 | extern void mminit_verify_pageflags_layout(void); |
115 | extern void mminit_verify_page_links(struct page *page, | |
116 | enum zone_type zone, unsigned long nid, unsigned long pfn); | |
68ad8df4 | 117 | extern void mminit_verify_zonelist(void); |
708614e6 | 118 | |
6b74ab97 MG |
119 | #else |
120 | ||
121 | static inline void mminit_dprintk(enum mminit_level level, | |
122 | const char *prefix, const char *fmt, ...) | |
123 | { | |
124 | } | |
125 | ||
708614e6 MG |
126 | static inline void mminit_verify_pageflags_layout(void) |
127 | { | |
128 | } | |
129 | ||
130 | static inline void mminit_verify_page_links(struct page *page, | |
131 | enum zone_type zone, unsigned long nid, unsigned long pfn) | |
132 | { | |
133 | } | |
68ad8df4 MG |
134 | |
135 | static inline void mminit_verify_zonelist(void) | |
136 | { | |
137 | } | |
6b74ab97 | 138 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
2dbb51c4 MG |
139 | |
140 | /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ | |
141 | #if defined(CONFIG_SPARSEMEM) | |
142 | extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
143 | unsigned long *end_pfn); | |
144 | #else | |
145 | static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
146 | unsigned long *end_pfn) | |
147 | { | |
148 | } | |
149 | #endif /* CONFIG_SPARSEMEM */ | |
150 | ||
0f8053a5 | 151 | #endif |