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 | |
Nick Piggin | 77a8a78 | 2006-01-06 00:10:57 -0800 | [diff] [blame] | 16 | static inline void set_page_refs(struct page *page, int order) |
| 17 | { |
| 18 | #ifdef CONFIG_MMU |
| 19 | set_page_count(page, 1); |
| 20 | #else |
| 21 | int i; |
| 22 | |
| 23 | /* |
| 24 | * We need to reference all the pages for this order, otherwise if |
| 25 | * anyone accesses one of the pages with (get/put) it will be freed. |
| 26 | * - eg: access_process_vm() |
| 27 | */ |
| 28 | for (i = 0; i < (1 << order); i++) |
| 29 | set_page_count(page + i, 1); |
| 30 | #endif /* CONFIG_MMU */ |
| 31 | } |
| 32 | |
Nick Piggin | 0f8053a | 2006-03-22 00:08:33 -0800 | [diff] [blame^] | 33 | static inline void __put_page(struct page *page) |
| 34 | { |
| 35 | atomic_dec(&page->_count); |
| 36 | } |
| 37 | |
David Howells | a226f6c | 2006-01-06 00:11:08 -0800 | [diff] [blame] | 38 | extern void fastcall __init __free_pages_bootmem(struct page *page, |
| 39 | unsigned int order); |
Nick Piggin | 0f8053a | 2006-03-22 00:08:33 -0800 | [diff] [blame^] | 40 | |
| 41 | #endif |