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/* internal.h: mm/ internal definitions

 *

 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.

 * Written by David Howells (dhowells@redhat.com)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version

 * 2 of the License, or (at your option) any later version.

 */

#ifndef __MM_INTERNAL_H

#define __MM_INTERNAL_H

#include <linux/mm.h>

static inline void set_page_count(struct page *page, int v)

{

        atomic_set(&page->_count, v);

}

/*

 * Turn a non-refcounted page (->_count == 0) into refcounted with

 * a count of one.

 */

static inline void set_page_refcounted(struct page *page)

{

        VM_BUG_ON(PageCompound(page) && PageTail(page));

        VM_BUG_ON(atomic_read(&page->_count));

        set_page_count(page, 1);

}

static inline void __put_page(struct page *page)

{

        atomic_dec(&page->_count);

}

extern void fastcall __init __free_pages_bootmem(struct page *page,

                                                unsigned int order);

/*

 * function for dealing with page's order in buddy system.

 * zone->lock is already acquired when we use these.

 * So, we don't need atomic page->flags operations here.

 */

static inline unsigned long page_order(struct page *page)

{

        VM_BUG_ON(!PageBuddy(page));

        return page_private(page);

}

#endif