Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Nick Piggin | 0f8053a | 2006-03-22 00:08:33 -0800 | [diff] [blame] | 11 | #ifndef __MM_INTERNAL_H |
| 12 | #define __MM_INTERNAL_H |
| 13 | |
| 14 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
Jan Beulich | 42b7772 | 2008-07-23 21:27:10 -0700 | [diff] [blame] | 16 | void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma, |
| 17 | unsigned long floor, unsigned long ceiling); |
| 18 | |
Andi Kleen | 01ad1c0 | 2008-07-23 21:27:46 -0700 | [diff] [blame] | 19 | extern void prep_compound_page(struct page *page, unsigned long order); |
| 20 | |
Nick Piggin | 7835e98 | 2006-03-22 00:08:40 -0800 | [diff] [blame] | 21 | static inline void set_page_count(struct page *page, int v) |
Nick Piggin | 77a8a78 | 2006-01-06 00:10:57 -0800 | [diff] [blame] | 22 | { |
Nick Piggin | 7835e98 | 2006-03-22 00:08:40 -0800 | [diff] [blame] | 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 | { |
Qi Yong | ae1276b | 2008-02-04 22:29:27 -0800 | [diff] [blame] | 32 | VM_BUG_ON(PageTail(page)); |
Nick Piggin | 725d704 | 2006-09-25 23:30:55 -0700 | [diff] [blame] | 33 | VM_BUG_ON(atomic_read(&page->_count)); |
Nick Piggin | 77a8a78 | 2006-01-06 00:10:57 -0800 | [diff] [blame] | 34 | set_page_count(page, 1); |
Nick Piggin | 77a8a78 | 2006-01-06 00:10:57 -0800 | [diff] [blame] | 35 | } |
| 36 | |
Nick Piggin | 0f8053a | 2006-03-22 00:08:33 -0800 | [diff] [blame] | 37 | static inline void __put_page(struct page *page) |
| 38 | { |
| 39 | atomic_dec(&page->_count); |
| 40 | } |
| 41 | |
Lee Schermerhorn | 894bc31 | 2008-10-18 20:26:39 -0700 | [diff] [blame^] | 42 | /* |
| 43 | * in mm/vmscan.c: |
| 44 | */ |
Nick Piggin | 62695a8 | 2008-10-18 20:26:09 -0700 | [diff] [blame] | 45 | extern int isolate_lru_page(struct page *page); |
Lee Schermerhorn | 894bc31 | 2008-10-18 20:26:39 -0700 | [diff] [blame^] | 46 | extern void putback_lru_page(struct page *page); |
Nick Piggin | 62695a8 | 2008-10-18 20:26:09 -0700 | [diff] [blame] | 47 | |
Lee Schermerhorn | 894bc31 | 2008-10-18 20:26:39 -0700 | [diff] [blame^] | 48 | /* |
| 49 | * in mm/page_alloc.c |
| 50 | */ |
Yasunori Goto | 0c0a4a5 | 2008-04-28 02:13:34 -0700 | [diff] [blame] | 51 | extern void __free_pages_bootmem(struct page *page, unsigned int order); |
Nick Piggin | 0f8053a | 2006-03-22 00:08:33 -0800 | [diff] [blame] | 52 | |
Mel Gorman | 48f13bf | 2007-10-16 01:26:10 -0700 | [diff] [blame] | 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 | } |
Alexander van Heukelum | b5a0e01 | 2008-02-23 15:24:06 -0800 | [diff] [blame] | 63 | |
Lee Schermerhorn | 894bc31 | 2008-10-18 20:26:39 -0700 | [diff] [blame^] | 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 | |
Alexander van Heukelum | b5a0e01 | 2008-02-23 15:24:06 -0800 | [diff] [blame] | 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 | |
Mel Gorman | 6b74ab9 | 2008-07-23 21:26:49 -0700 | [diff] [blame] | 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 | |
Mel Gorman | 708614e | 2008-07-23 21:26:51 -0700 | [diff] [blame] | 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); |
Mel Gorman | 68ad8df | 2008-07-23 21:26:52 -0700 | [diff] [blame] | 117 | extern void mminit_verify_zonelist(void); |
Mel Gorman | 708614e | 2008-07-23 21:26:51 -0700 | [diff] [blame] | 118 | |
Mel Gorman | 6b74ab9 | 2008-07-23 21:26:49 -0700 | [diff] [blame] | 119 | #else |
| 120 | |
| 121 | static inline void mminit_dprintk(enum mminit_level level, |
| 122 | const char *prefix, const char *fmt, ...) |
| 123 | { |
| 124 | } |
| 125 | |
Mel Gorman | 708614e | 2008-07-23 21:26:51 -0700 | [diff] [blame] | 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 | } |
Mel Gorman | 68ad8df | 2008-07-23 21:26:52 -0700 | [diff] [blame] | 134 | |
| 135 | static inline void mminit_verify_zonelist(void) |
| 136 | { |
| 137 | } |
Mel Gorman | 6b74ab9 | 2008-07-23 21:26:49 -0700 | [diff] [blame] | 138 | #endif /* CONFIG_DEBUG_MEMORY_INIT */ |
Mel Gorman | 2dbb51c | 2008-07-23 21:26:52 -0700 | [diff] [blame] | 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 | |
Nick Piggin | 0f8053a | 2006-03-22 00:08:33 -0800 | [diff] [blame] | 151 | #endif |