blob: 17256bb2f4ef23bfef9ec32856057124149f414d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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 Piggin77a8a782006-01-06 00:10:57 -080012static 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
David Howellsa226f6c2006-01-06 00:11:08 -080029extern void fastcall __init __free_pages_bootmem(struct page *page,
30 unsigned int order);