projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* internal.h: mm/ internal definitions |
| 2 | * | |
| 3 | * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. | |
| 4 | * Written by David Howells ([email protected]) | |
| 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 | { | |
| d85f3385 | 27 | VM_BUG_ON(PageCompound(page) && 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 | ||
| a226f6c8 DH |
37 | extern void fastcall __init __free_pages_bootmem(struct page *page, |
| 38 | unsigned int order); | |
| 0f8053a5 | 39 | |
| 48f13bf3 MG |
40 | /* |
| 41 | * function for dealing with page's order in buddy system. | |
| 42 | * zone->lock is already acquired when we use these. | |
| 43 | * So, we don't need atomic page->flags operations here. | |
| 44 | */ | |
| 45 | static inline unsigned long page_order(struct page *page) | |
| 46 | { | |
| 47 | VM_BUG_ON(!PageBuddy(page)); | |
| 48 | return page_private(page); | |
| 49 | } | |
| 0f8053a5 | 50 | #endif |