| 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 | */ |
| 11 | |
| Nick Piggin | 77a8a78 | 2006-01-06 00:10:57 -0800 | [diff] [blame^] | 12 | static inline void set_page_refs(struct page *page, int order) |
| 13 | { |
| 14 | #ifdef CONFIG_MMU |
| 15 | set_page_count(page, 1); |
| 16 | #else |
| 17 | int i; |
| 18 | |
| 19 | /* |
| 20 | * We need to reference all the pages for this order, otherwise if |
| 21 | * anyone accesses one of the pages with (get/put) it will be freed. |
| 22 | * - eg: access_process_vm() |
| 23 | */ |
| 24 | for (i = 0; i < (1 << order); i++) |
| 25 | set_page_count(page + i, 1); |
| 26 | #endif /* CONFIG_MMU */ |
| 27 | } |
| 28 | |