xref: /openbmc/linux/mm/internal.h (revision e868d61272caa648214046a096e5a6bfc068dc8c)
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
13 
14 #include <linux/mm.h>
15 
16 static inline void set_page_count(struct page *page, int v)
17 {
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 {
27 	VM_BUG_ON(PageCompound(page) && PageTail(page));
28 	VM_BUG_ON(atomic_read(&page->_count));
29 	set_page_count(page, 1);
30 }
31 
32 static inline void __put_page(struct page *page)
33 {
34 	atomic_dec(&page->_count);
35 }
36 
37 extern void fastcall __init __free_pages_bootmem(struct page *page,
38 						unsigned int order);
39 
40 #endif
41