| 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 | BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page); |
| 28 | 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 |