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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 | |
7835e98b | 16 | static inline void set_page_count(struct page *page, int v) |
77a8a788 | 17 | { |
7835e98b NP |
18 | atomic_set(&page->_count, v); |
19 | } | |
20 | ||
21 | /* | |
22 | * Turn a non-refcounted page (->_count == 0) into refcounted with | |
23 | * a count of one. | |
24 | */ | |
25 | static inline void set_page_refcounted(struct page *page) | |
26 | { | |
ae1276b9 | 27 | VM_BUG_ON(PageTail(page)); |
725d704e | 28 | VM_BUG_ON(atomic_read(&page->_count)); |
77a8a788 | 29 | set_page_count(page, 1); |
77a8a788 NP |
30 | } |
31 | ||
0f8053a5 NP |
32 | static inline void __put_page(struct page *page) |
33 | { | |
34 | atomic_dec(&page->_count); | |
35 | } | |
36 | ||
0c0a4a51 | 37 | extern void __free_pages_bootmem(struct page *page, unsigned int order); |
0f8053a5 | 38 | |
48f13bf3 MG |
39 | /* |
40 | * function for dealing with page's order in buddy system. | |
41 | * zone->lock is already acquired when we use these. | |
42 | * So, we don't need atomic page->flags operations here. | |
43 | */ | |
44 | static inline unsigned long page_order(struct page *page) | |
45 | { | |
46 | VM_BUG_ON(!PageBuddy(page)); | |
47 | return page_private(page); | |
48 | } | |
b5a0e011 AH |
49 | |
50 | /* | |
51 | * FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node, | |
52 | * so all functions starting at paging_init should be marked __init | |
53 | * in those cases. SPARSEMEM, however, allows for memory hotplug, | |
54 | * and alloc_bootmem_node is not used. | |
55 | */ | |
56 | #ifdef CONFIG_SPARSEMEM | |
57 | #define __paginginit __meminit | |
58 | #else | |
59 | #define __paginginit __init | |
60 | #endif | |
61 | ||
6b74ab97 MG |
62 | /* Memory initialisation debug and verification */ |
63 | enum mminit_level { | |
64 | MMINIT_WARNING, | |
65 | MMINIT_VERIFY, | |
66 | MMINIT_TRACE | |
67 | }; | |
68 | ||
69 | #ifdef CONFIG_DEBUG_MEMORY_INIT | |
70 | ||
71 | extern int mminit_loglevel; | |
72 | ||
73 | #define mminit_dprintk(level, prefix, fmt, arg...) \ | |
74 | do { \ | |
75 | if (level < mminit_loglevel) { \ | |
76 | printk(level <= MMINIT_WARNING ? KERN_WARNING : KERN_DEBUG); \ | |
77 | printk(KERN_CONT "mminit::" prefix " " fmt, ##arg); \ | |
78 | } \ | |
79 | } while (0) | |
80 | ||
708614e6 MG |
81 | extern void mminit_verify_pageflags_layout(void); |
82 | extern void mminit_verify_page_links(struct page *page, | |
83 | enum zone_type zone, unsigned long nid, unsigned long pfn); | |
84 | ||
6b74ab97 MG |
85 | #else |
86 | ||
87 | static inline void mminit_dprintk(enum mminit_level level, | |
88 | const char *prefix, const char *fmt, ...) | |
89 | { | |
90 | } | |
91 | ||
708614e6 MG |
92 | static inline void mminit_verify_pageflags_layout(void) |
93 | { | |
94 | } | |
95 | ||
96 | static inline void mminit_verify_page_links(struct page *page, | |
97 | enum zone_type zone, unsigned long nid, unsigned long pfn) | |
98 | { | |
99 | } | |
6b74ab97 | 100 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
2dbb51c4 MG |
101 | |
102 | /* mminit_validate_memmodel_limits is independent of CONFIG_DEBUG_MEMORY_INIT */ | |
103 | #if defined(CONFIG_SPARSEMEM) | |
104 | extern void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
105 | unsigned long *end_pfn); | |
106 | #else | |
107 | static inline void mminit_validate_memmodel_limits(unsigned long *start_pfn, | |
108 | unsigned long *end_pfn) | |
109 | { | |
110 | } | |
111 | #endif /* CONFIG_SPARSEMEM */ | |
112 | ||
0f8053a5 | 113 | #endif |