ia64/linux-2.6.18-xen.hg

view mm/internal.h @ 563:3b3701ad4eec

pvSCSI frontend driver

Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com>
Signed-off-by: Jun Kamada <kama@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Jun 02 09:58:56 2008 +0100 (2008-06-02)
parents 831230e53067
children
line source
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 #ifndef __MM_INTERNAL_H
12 #define __MM_INTERNAL_H
14 #include <linux/mm.h>
16 static inline void set_page_count(struct page *page, int v)
17 {
18 atomic_set(&page->_count, v);
19 }
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 {
27 BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page);
28 BUG_ON(atomic_read(&page->_count));
29 set_page_count(page, 1);
30 }
32 static inline void __put_page(struct page *page)
33 {
34 atomic_dec(&page->_count);
35 }
37 extern void fastcall __init __free_pages_bootmem(struct page *page,
38 unsigned int order);
40 #endif